Ios UICollectionView:ObjC Apple示例代码到Swift转换（找不到成员）
我尝试将Apple为UICollectionView（）提供的示例代码转换为Swift 但是，在写入时（视图控制器，第82行）：Ios UICollectionView:ObjC Apple示例代码到Swift转换（找不到成员）,ios,uiviewcontroller,swift,uicollectionview,Ios,Uiviewcontroller,Swift,Uicollectionview,我尝试将Apple为UICollectionView（）提供的示例代码转换为Swift 但是，在写入时（视图控制器，第82行）：self.collectionView.performBatchUpdates（self.collectionView.deleteItemsAndExpaths（NSArray（object:tappedCellPath）），完成：nil） 我得到了错误 Could not find member 'performBatchUpdates' 因此，我甚至连建筑都不知
self.collectionView.performBatchUpdates（self.collectionView.deleteItemsAndExpaths（NSArray（object:tappedCellPath）），完成：nil）Could not find member 'performBatchUpdates'
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
// Override point for customization after application launch.
self.window!.backgroundColor = UIColor.whiteColor()
self.window!.makeKeyAndVisible()
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
import UIKit
let reuseIdentifier = "Cell"
class ViewController: UICollectionViewController {
init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
// Custom initialization
}
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Register cell classes
cellCount = 20
var tapRecognizer : UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTapGesture:")
self.collectionView.addGestureRecognizer(tapRecognizer)
self.collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
self.collectionView.reloadData()
self.collectionView.backgroundColor = UIColor.scrollViewTexturedBackgroundColor()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// #pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
// #pragma mark UICollectionViewDataSource
override func numberOfSectionsInCollectionView(collectionView: UICollectionView?) -> Int {
//#warning Incomplete method implementation -- Return the number of sections
return 0
}
override func collectionView(collectionView: UICollectionView?, numberOfItemsInSection section: Int) -> Int {
//#warning Incomplete method implementation -- Return the number of items in the section
return cellCount!
}
override func collectionView(collectionView: UICollectionView?, cellForItemAtIndexPath indexPath: NSIndexPath?) -> UICollectionViewCell? {
let cell = collectionView?.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as UICollectionViewCell
// Configure the cell
return cell
}
func handleTapGesture(sender: UITapGestureRecognizer) {
if (sender.state == .Ended) {
println("tap")
var initialPinchPoint : CGPoint = sender.locationInView(self.collectionView)
var tappedCellPath : NSIndexPath = self.collectionView.indexPathForItemAtPoint(initialPinchPoint)
if (tappedCellPath != nil) {
cellCount = cellCount!-1
self.collectionView.performBatchUpdates(self.collectionView.deleteItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
} else {
cellCount = cellCount!+1
self.collectionView.performBatchUpdates(self.collectionView.insertItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
}
}
}
// pragma mark <UICollectionViewDelegate>
/*
// Uncomment this method to specify if the specified item should be highlighted during tracking
func collectionView(collectionView: UICollectionView?, shouldHighlightItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment this method to specify if the specified item should be selected
func collectionView(collectionView: UICollectionView?, shouldSelectItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
func collectionView(collectionView: UICollectionView?, shouldShowMenuForItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, canPerformAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, performAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) {
}
*/
}
import UIKit
class Cell: UICollectionViewCell {
init(frame: CGRect) {
super.init(frame: frame)
self.contentView.layer.cornerRadius = 35
self.contentView.layer.borderWidth = 1
self.contentView.layer.borderColor = UIColor.whiteColor().CGColor
self.contentView.backgroundColor = UIColor.clearColor()
}
}
import UIKit
import QuartzCore
var cellCount : NSInteger?
var center : CGPoint?
var radius : CGFloat?
var deleteIndexPaths : NSMutableArray?
var insertIndexPaths : NSMutableArray?
class CircleLayout: UICollectionViewLayout {
var centerX : CGFloat?
var centerY : CGFloat?
override func prepareLayout() {
super.prepareLayout()
var size : CGSize = self.collectionView.frame.size
cellCount = self.collectionView.numberOfItemsInSection(0)
center = CGPointMake(size.width/2.0, size.height/2.0)
centerX = center!.x
centerY = center!.y
radius = 300
}
override func collectionViewContentSize() -> CGSize {
return self.collectionView.frame.size
}
override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
attributes.size = CGSizeMake(70, 70)
attributes.center = CGPointMake(0,0)
return attributes
}
override func layoutAttributesForElementsInRect(rect: CGRect) -> AnyObject[]! {
var attributes : NSMutableArray = NSMutableArray.array()
for (var i = 0; i<cellCount!; i++) {
var indexPath : NSIndexPath = NSIndexPath(forItem: i, inSection: 0)
attributes.addObject(self.layoutAttributesForItemAtIndexPath(indexPath))
}
return attributes
}
override func prepareForCollectionViewUpdates(updateItems: AnyObject[]!) {
super.prepareForCollectionViewUpdates(updateItems)
deleteIndexPaths = NSMutableArray.array()
insertIndexPaths = NSMutableArray.array()
for update : AnyObject in updateItems{
if (update.updateAction == UICollectionUpdateAction.Delete) {
deleteIndexPaths!.addObject(update.indexPathBeforeUpdate)
} else if (update.updateAction == UICollectionUpdateAction.Insert) {
insertIndexPaths!.addObject(update.indexPathAfterUpdate)
}
}
}
override func finalizeCollectionViewUpdates() {
deleteIndexPaths = nil
insertIndexPaths = nil
}
override func initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath)
if (insertIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
}
}
return attributes
}
override func finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath)
if (deleteIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
attributes.transform3D = CATransform3DMakeScale(0.1,0.1,1.0)
}
}
return attributes
}
}
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
// Override point for customization after application launch.
self.window!.backgroundColor = UIColor.whiteColor()
self.window!.makeKeyAndVisible()
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
import UIKit
let reuseIdentifier = "Cell"
class ViewController: UICollectionViewController {
init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
// Custom initialization
}
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Register cell classes
cellCount = 20
var tapRecognizer : UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTapGesture:")
self.collectionView.addGestureRecognizer(tapRecognizer)
self.collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
self.collectionView.reloadData()
self.collectionView.backgroundColor = UIColor.scrollViewTexturedBackgroundColor()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// #pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
// #pragma mark UICollectionViewDataSource
override func numberOfSectionsInCollectionView(collectionView: UICollectionView?) -> Int {
//#warning Incomplete method implementation -- Return the number of sections
return 0
}
override func collectionView(collectionView: UICollectionView?, numberOfItemsInSection section: Int) -> Int {
//#warning Incomplete method implementation -- Return the number of items in the section
return cellCount!
}
override func collectionView(collectionView: UICollectionView?, cellForItemAtIndexPath indexPath: NSIndexPath?) -> UICollectionViewCell? {
let cell = collectionView?.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as UICollectionViewCell
// Configure the cell
return cell
}
func handleTapGesture(sender: UITapGestureRecognizer) {
if (sender.state == .Ended) {
println("tap")
var initialPinchPoint : CGPoint = sender.locationInView(self.collectionView)
var tappedCellPath : NSIndexPath = self.collectionView.indexPathForItemAtPoint(initialPinchPoint)
if (tappedCellPath != nil) {
cellCount = cellCount!-1
self.collectionView.performBatchUpdates(self.collectionView.deleteItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
} else {
cellCount = cellCount!+1
self.collectionView.performBatchUpdates(self.collectionView.insertItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
}
}
}
// pragma mark <UICollectionViewDelegate>
/*
// Uncomment this method to specify if the specified item should be highlighted during tracking
func collectionView(collectionView: UICollectionView?, shouldHighlightItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment this method to specify if the specified item should be selected
func collectionView(collectionView: UICollectionView?, shouldSelectItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
func collectionView(collectionView: UICollectionView?, shouldShowMenuForItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, canPerformAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, performAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) {
}
*/
}
import UIKit
class Cell: UICollectionViewCell {
init(frame: CGRect) {
super.init(frame: frame)
self.contentView.layer.cornerRadius = 35
self.contentView.layer.borderWidth = 1
self.contentView.layer.borderColor = UIColor.whiteColor().CGColor
self.contentView.backgroundColor = UIColor.clearColor()
}
}
import UIKit
import QuartzCore
var cellCount : NSInteger?
var center : CGPoint?
var radius : CGFloat?
var deleteIndexPaths : NSMutableArray?
var insertIndexPaths : NSMutableArray?
class CircleLayout: UICollectionViewLayout {
var centerX : CGFloat?
var centerY : CGFloat?
override func prepareLayout() {
super.prepareLayout()
var size : CGSize = self.collectionView.frame.size
cellCount = self.collectionView.numberOfItemsInSection(0)
center = CGPointMake(size.width/2.0, size.height/2.0)
centerX = center!.x
centerY = center!.y
radius = 300
}
override func collectionViewContentSize() -> CGSize {
return self.collectionView.frame.size
}
override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
attributes.size = CGSizeMake(70, 70)
attributes.center = CGPointMake(0,0)
return attributes
}
override func layoutAttributesForElementsInRect(rect: CGRect) -> AnyObject[]! {
var attributes : NSMutableArray = NSMutableArray.array()
for (var i = 0; i<cellCount!; i++) {
var indexPath : NSIndexPath = NSIndexPath(forItem: i, inSection: 0)
attributes.addObject(self.layoutAttributesForItemAtIndexPath(indexPath))
}
return attributes
}
override func prepareForCollectionViewUpdates(updateItems: AnyObject[]!) {
super.prepareForCollectionViewUpdates(updateItems)
deleteIndexPaths = NSMutableArray.array()
insertIndexPaths = NSMutableArray.array()
for update : AnyObject in updateItems{
if (update.updateAction == UICollectionUpdateAction.Delete) {
deleteIndexPaths!.addObject(update.indexPathBeforeUpdate)
} else if (update.updateAction == UICollectionUpdateAction.Insert) {
insertIndexPaths!.addObject(update.indexPathAfterUpdate)
}
}
}
override func finalizeCollectionViewUpdates() {
deleteIndexPaths = nil
insertIndexPaths = nil
}
override func initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath)
if (insertIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
}
}
return attributes
}
override func finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath)
if (deleteIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
attributes.transform3D = CATransform3DMakeScale(0.1,0.1,1.0)
}
}
return attributes
}
}
import UIKit
@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
var window: UIWindow?
func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: NSDictionary?) -> Bool {
self.window = UIWindow(frame: UIScreen.mainScreen().bounds)
// Override point for customization after application launch.
self.window!.backgroundColor = UIColor.whiteColor()
self.window!.makeKeyAndVisible()
return true
}
func applicationWillResignActive(application: UIApplication) {
// Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
// Use this method to pause ongoing tasks, disable timers, and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}
func applicationDidEnterBackground(application: UIApplication) {
// Use this method to release shared resources, save user data, invalidate timers, and store enough application state information to restore your application to its current state in case it is terminated later.
// If your application supports background execution, this method is called instead of applicationWillTerminate: when the user quits.
}
func applicationWillEnterForeground(application: UIApplication) {
// Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}
func applicationDidBecomeActive(application: UIApplication) {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background, optionally refresh the user interface.
}
func applicationWillTerminate(application: UIApplication) {
// Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}
}
import UIKit
let reuseIdentifier = "Cell"
class ViewController: UICollectionViewController {
init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: NSBundle?) {
super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
// Custom initialization
}
override func viewDidLoad() {
super.viewDidLoad()
// Uncomment the following line to preserve selection between presentations
// self.clearsSelectionOnViewWillAppear = false
// Register cell classes
cellCount = 20
var tapRecognizer : UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: "handleTapGesture:")
self.collectionView.addGestureRecognizer(tapRecognizer)
self.collectionView.registerClass(UICollectionViewCell.self, forCellWithReuseIdentifier: reuseIdentifier)
self.collectionView.reloadData()
self.collectionView.backgroundColor = UIColor.scrollViewTexturedBackgroundColor()
// Do any additional setup after loading the view.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
/*
// #pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
// #pragma mark UICollectionViewDataSource
override func numberOfSectionsInCollectionView(collectionView: UICollectionView?) -> Int {
//#warning Incomplete method implementation -- Return the number of sections
return 0
}
override func collectionView(collectionView: UICollectionView?, numberOfItemsInSection section: Int) -> Int {
//#warning Incomplete method implementation -- Return the number of items in the section
return cellCount!
}
override func collectionView(collectionView: UICollectionView?, cellForItemAtIndexPath indexPath: NSIndexPath?) -> UICollectionViewCell? {
let cell = collectionView?.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as UICollectionViewCell
// Configure the cell
return cell
}
func handleTapGesture(sender: UITapGestureRecognizer) {
if (sender.state == .Ended) {
println("tap")
var initialPinchPoint : CGPoint = sender.locationInView(self.collectionView)
var tappedCellPath : NSIndexPath = self.collectionView.indexPathForItemAtPoint(initialPinchPoint)
if (tappedCellPath != nil) {
cellCount = cellCount!-1
self.collectionView.performBatchUpdates(self.collectionView.deleteItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
} else {
cellCount = cellCount!+1
self.collectionView.performBatchUpdates(self.collectionView.insertItemsAtIndexPaths(NSArray(object: tappedCellPath)), completion: nil)
}
}
}
// pragma mark <UICollectionViewDelegate>
/*
// Uncomment this method to specify if the specified item should be highlighted during tracking
func collectionView(collectionView: UICollectionView?, shouldHighlightItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment this method to specify if the specified item should be selected
func collectionView(collectionView: UICollectionView?, shouldSelectItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return true
}
*/
/*
// Uncomment these methods to specify if an action menu should be displayed for the specified item, and react to actions performed on the item
func collectionView(collectionView: UICollectionView?, shouldShowMenuForItemAtIndexPath indexPath: NSIndexPath?) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, canPerformAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) -> Bool {
return false
}
func collectionView(collectionView: UICollectionView?, performAction action: String?, forItemAtIndexPath indexPath: NSIndexPath?, withSender sender: AnyObject) {
}
*/
}
import UIKit
class Cell: UICollectionViewCell {
init(frame: CGRect) {
super.init(frame: frame)
self.contentView.layer.cornerRadius = 35
self.contentView.layer.borderWidth = 1
self.contentView.layer.borderColor = UIColor.whiteColor().CGColor
self.contentView.backgroundColor = UIColor.clearColor()
}
}
import UIKit
import QuartzCore
var cellCount : NSInteger?
var center : CGPoint?
var radius : CGFloat?
var deleteIndexPaths : NSMutableArray?
var insertIndexPaths : NSMutableArray?
class CircleLayout: UICollectionViewLayout {
var centerX : CGFloat?
var centerY : CGFloat?
override func prepareLayout() {
super.prepareLayout()
var size : CGSize = self.collectionView.frame.size
cellCount = self.collectionView.numberOfItemsInSection(0)
center = CGPointMake(size.width/2.0, size.height/2.0)
centerX = center!.x
centerY = center!.y
radius = 300
}
override func collectionViewContentSize() -> CGSize {
return self.collectionView.frame.size
}
override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = UICollectionViewLayoutAttributes(forCellWithIndexPath: indexPath)
attributes.size = CGSizeMake(70, 70)
attributes.center = CGPointMake(0,0)
return attributes
}
override func layoutAttributesForElementsInRect(rect: CGRect) -> AnyObject[]! {
var attributes : NSMutableArray = NSMutableArray.array()
for (var i = 0; i<cellCount!; i++) {
var indexPath : NSIndexPath = NSIndexPath(forItem: i, inSection: 0)
attributes.addObject(self.layoutAttributesForItemAtIndexPath(indexPath))
}
return attributes
}
override func prepareForCollectionViewUpdates(updateItems: AnyObject[]!) {
super.prepareForCollectionViewUpdates(updateItems)
deleteIndexPaths = NSMutableArray.array()
insertIndexPaths = NSMutableArray.array()
for update : AnyObject in updateItems{
if (update.updateAction == UICollectionUpdateAction.Delete) {
deleteIndexPaths!.addObject(update.indexPathBeforeUpdate)
} else if (update.updateAction == UICollectionUpdateAction.Insert) {
insertIndexPaths!.addObject(update.indexPathAfterUpdate)
}
}
}
override func finalizeCollectionViewUpdates() {
deleteIndexPaths = nil
insertIndexPaths = nil
}
override func initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.initialLayoutAttributesForAppearingItemAtIndexPath(itemIndexPath)
if (insertIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
}
}
return attributes
}
override func finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath: NSIndexPath!) -> UICollectionViewLayoutAttributes! {
var attributes : UICollectionViewLayoutAttributes = super.finalLayoutAttributesForDisappearingItemAtIndexPath(itemIndexPath)
if (deleteIndexPaths!.containsObject(itemIndexPath)) {
if(attributes == false) {
attributes = self.layoutAttributesForItemAtIndexPath(itemIndexPath)
attributes.alpha = 0.0
attributes.center = CGPointMake(center!.x, center!.y)
attributes.transform3D = CATransform3DMakeScale(0.1,0.1,1.0)
}
}
return attributes
}
}
导入UIKit
进口石英砂
var-cellCount:NSInteger？
变量中心：CGPoint？
变量半径：CGFloat？
var deleteIndexPaths:NSMutableArray？
var insertIndexPaths:NSMutableArray？
类CircleLayout:UICollectionViewLayout{
var centerX:CGFloat？
变量中心：CGFloat？
重写函数prepareLayout（）{
super.prepareLayout（）
变量大小：CGSize=self.collectionView.frame.size
cellCount=self.collectionView.numberOfItemsInSection（0）
中心=CGPointMake（大小.宽度/2.0，大小.高度/2.0）
centerX=中心！.x
centerY=center！.y
半径=300
}
重写func collectionViewContentSize（）->CGSize{
返回self.collectionView.frame.size
}
重写func LayoutAttribute ForItemAtIndexPath（indexPath:NSIndexPath！）->UICollectionViewLayoutAttribute{
变量属性：UICollectionViewLayoutAttributes=UICollectionViewLayoutAttributes（forCellWithIndexPath:indexPath）
attributes.size=CGSizeMake（70,70）
attributes.center=CGPointMake（0,0）
返回属性
}
重写func LAYUTATTRIBUTESFORELEMENTSINRECT（rect:CGRect）->任何对象[]{
变量属性：NSMutableArray=NSMutableArray.array（）
对于（变量i=0；i UICollectionViewLayoutAttribute{
变量属性：UICollectionViewLayoutAttributes=super.initialLayoutAttributesForAppearingItemAtIndexPath（itemIndexPath）
if（insertindexpath！.containsObject（itemIndexPath））{
如果（属性==false）{
attributes=self.layouttributesforItemAtIndexPath（itemIndexPath）
attributes.alpha=0.0
attributes.center=CGPointMake（中心！.x，中心！.y）
}
}
返回属性
}
重写func FinallYoutAttributesfordisAppearinGitemAtIndexPath（itemIndexPath:NSIndexPath！）->UICollectionViewLayoutAttributes{
变量属性：UICollectionViewLayoutAttributes=super.finalLayoutAttributesForDisappearingItemAtIndexPath（itemIndexPath）
if（deleteIndexPaths！.containsObject（itemIndexPath））{
如果（属性==false）{
attributes=self.layouttributesforItemAtIndexPath（itemIndexPath）
attributes.alpha=0.0
attributes.center=CGPointMake（中心！.x，中心！.y）
attributes.transform3D=CATTransformM3dMakeScale（0.1,0.1,1.0）
}
}
返回属性
}
}
self.collectionView.performBatchUpdates({
self.collectionView.deleteItemsAtIndexPaths(NSArray(object: tappedCellPath))
}, completion: nil)
performBatchUpdates期望块作为其第一个参数。我相信这将按预期工作：
self.collectionView.performBatchUpdates({
self.collectionView.deleteItemsAtIndexPaths(NSArray(object: tappedCellPath))
}, completion: nil)
请删除所有不相关的代码。说真的-没有人会读所有这些。1.您是否尝试过将失败的行拆分为几行（使用临时变量）？由于Swift编译器的错误，有时会有神奇的帮助。2.您是否尝试过清理目标并重建？有时也会有帮助。我不知道问题的根源是代码的哪一部分。如果我只是发布我认为相关的代码，我可能会错过导致问题的部分。@radex-我尝试过这样做，但没有成功你能给我一个我应该尝试的例子吗？请删除所有不相关的代码。说真的，没有人会读所有这些。1.你有没有尝试过将失败的行拆分为几行（使用临时变量）？由于Swift编译器的错误，有时会有神奇的帮助。2.您是否尝试过清理目标并重建？有时也会有帮助。我不知道问题的根源是代码的哪一部分。如果我只是发布我认为相关的代码，我可能会错过导致问题的部分。@radex-我尝试过这样做，但没有成功你能给我一个我应该尝试的例子吗？这解决了那个问题！非常感谢-我一定是瞎子！这解决了那个问题！非常感谢-我一定是瞎子！