Ios 以编程方式创建UITableView
我在Xcode 4.6中有一个使用故事板的应用程序。我向视图控制器类添加了一个UITableView,该类按预期工作。但是,当我尝试删除情节提要中的UITableView并以编程方式将其添加回同一个类时,我遇到了两个特定的问题: 1)虽然我将UITableViewCell类型设置为subtitle类型,但细节标签不再显示。 2)当我选择一个单元格时应该出现的segue没有出现,而且prepare segue甚至没有被调用,这表明在选择一个单元格时没有消息发送到表视图。 以下是相关代码:Ios 以编程方式创建UITableView,ios,objective-c,xcode,uitableview,Ios,Objective C,Xcode,Uitableview,我在Xcode 4.6中有一个使用故事板的应用程序。我向视图控制器类添加了一个UITableView,该类按预期工作。但是,当我尝试删除情节提要中的UITableView并以编程方式将其添加回同一个类时,我遇到了两个特定的问题: 1)虽然我将UITableViewCell类型设置为subtitle类型,但细节标签不再显示。 2)当我选择一个单元格时应该出现的segue没有出现,而且prepare segue甚至没有被调用,这表明在选择一个单元格时没有消息发送到表视图。 以下是相关代码: @int
@interface StatsTableViewController () <UITableViewDataSource, UITableViewDelegate>
@property (strong, nonatomic) UITableView *tableView;
@end
@implementation StatsTableViewController
-(UITableView *)makeTableView
{
CGFloat x = 0;
CGFloat y = 50;
CGFloat width = self.view.frame.size.width;
CGFloat height = self.view.frame.size.height - 50;
CGRect tableFrame = CGRectMake(x, y, width, height);
UITableView *tableView = [[UITableView alloc]initWithFrame:tableFrame style:UITableViewStylePlain];
tableView.rowHeight = 45;
tableView.sectionFooterHeight = 22;
tableView.sectionHeaderHeight = 22;
tableView.scrollEnabled = YES;
tableView.showsVerticalScrollIndicator = YES;
tableView.userInteractionEnabled = YES;
tableView.bounces = YES;
tableView.delegate = self;
tableView.dataSource = self;
return tableView;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.tableView = [self makeTableView];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"newFriendCell"];
[self.view addSubview:self.tableView];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"newFriendCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil)
{
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
Friend *friend = [self.fetchedResultsController objectAtIndexPath:indexPath];
**//THIS DATA APPEARS**
cell.textLabel.text = friend.name;
cell.textLabel.font = [cell.textLabel.font fontWithSize:20];
cell.imageView.image = [UIImage imageNamed:@"icon57x57"];
**//THIS DATA DOES NOT APPEAR**
cell.detailTextLabel.text = [NSString stringWithFormat:@"%i Games", friend.gameCount];
cell.detailTextLabel.textColor = [UIColor lightGrayColor];
return cell;
}
-(void)tableView:(UITableView *)tableView didDeselectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:@"detailsView" sender:self];
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
//I set the segue identifier in the interface builder
if ([segue.identifier isEqualToString:@"detailsView"])
{
NSLog(@"segue"); //check to see if method is called, it is NOT called upon cell touch
NSIndexPath *indexPath = [self.tableView indexPathForCell:sender];
///more code to prepare next view controller....
}
}
@接口StatsTableViewController()
@属性(强,非原子)UITableView*tableView;
@结束
@StatsTableViewController的实现
-(UITableView*)makeTableView
{
cgx=0;
cGy=50;
CGFloat宽度=self.view.frame.size.width;
CGFloat高度=self.view.frame.size.height-50;
CGRect tableFrame=CGRectMake(x,y,宽度,高度);
UITableView*tableView=[[UITableView alloc]initWithFrame:tableFrame样式:UITableViewStylePlain];
tableView.rowHeight=45;
tableView.sectionFooterHeight=22;
tableView.sectionHeaderHeight=22;
tableView.scrollEnabled=是;
tableView.showsVerticalScrollIndicator=是;
tableView.userInteractionEnabled=是;
tableView.bounces=是;
tableView.delegate=self;
tableView.dataSource=self;
返回表视图;
}
-(无效)viewDidLoad
{
[超级视图下载];
self.tableView=[self-makeTableView];
[self.tableView注册表类:[UITableViewCell类]强制重用标识符:@“newFriendCell”];
[self.view addSubview:self.tableView];
}
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
静态NSString*CellIdentifier=@“newFriendCell”;
UITableViewCell*单元格=[tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
如果(单元格==nil)
{
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle重用标识符:CellIdentifier];
}
Friend*Friend=[self.fetchedResultsController对象索引路径:indexPath];
**//显示此数据**
cell.textlab.text=friend.name;
cell.textLabel.font=[cell.textLabel.fontWithSize:20];
cell.imageView.image=[UIImage ImageName:@“icon57x57”];
**//此数据不显示**
cell.detailTextLabel.text=[NSString stringWithFormat:@“%i Games”,friend.gameCount];
cell.detailTextLabel.textColor=[UIColor lightGrayColor];
返回单元;
}
-(void)tableView:(UITableView*)tableView未取消行索引路径:(NSIndexPath*)索引路径
{
[self-PerformsgueWithIdentifier:@“detailsView”发件人:self];
}
-(void)prepareForSegue:(UIStoryboardSegue*)segue发送方:(id)发送方
{
//我在界面生成器中设置了segue标识符
if([segue.identifier IsequalString:@“detailsView”])
{
NSLog(@“segue”);//检查是否调用了方法,在单元触摸时不会调用该方法
nsindepath*indepath=[self.tableView indexPathForCell:sender];
///准备下一个视图控制器的更多代码。。。。
}
}
为了解决这两个问题,我不确定我忘记了做什么。非常感谢您的帮助。当您注册一个类并使用dequeueReusableCellWithIdentifier:forIndexPath:,dequeue方法保证返回一个单元格,因此永远不会输入if(cell==nil)子句。因此,只需按旧方法执行,不注册类,并使用dequeueReusableCellWithIdentifier:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"newFriendCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
//etc.
return cell;
}
至于segue,它不能被调用,因为您不能对您在代码中而不是在IB中创建的表进行segue。同样,请回到旧方法,使用tableView:DidSelectRowatineXpath:选择单元格时将调用它。在那里实例化您的细节控制器,并在代码中进行转换
编辑后:
我没有看到你添加的代码。您已经实现了DidDeceloseRowatineXpath,而不是DidSelectRowatineXpath。如果你改变这一点,你的segue应该可以工作。你可能会这样做,它的工作100%
- (void)viewDidLoad
{
[super viewDidLoad];
// init table view
tableView = [[UITableView alloc] initWithFrame:self.view.bounds style:UITableViewStylePlain];
// must set delegate & dataSource, otherwise the the table will be empty and not responsive
tableView.delegate = self;
tableView.dataSource = self;
tableView.backgroundColor = [UIColor cyanColor];
// add to canvas
[self.view addSubview:tableView];
}
#pragma mark - UITableViewDataSource
// number of section(s), now I assume there is only 1 section
- (NSInteger)numberOfSectionsInTableView:(UITableView *)theTableView
{
return 1;
}
// number of row in the section, I assume there is only 1 row
- (NSInteger)tableView:(UITableView *)theTableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
// the cell will be returned to the tableView
- (UITableViewCell *)tableView:(UITableView *)theTableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = @"HistoryCell";
// Similar to UITableViewCell, but
JSCustomCell *cell = (JSCustomCell *)[theTableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[JSCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
// Just want to test, so I hardcode the data
cell.descriptionLabel.text = @"Testing";
return cell;
}
#pragma mark - UITableViewDelegate
// when user tap the row, what action you want to perform
- (void)tableView:(UITableView *)theTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"selected %d row", indexPath.row);
}
@end
这些是UITableView委托方法。使用tableViewController创建tableview
#import "ViewController.h"
@interface ViewController ()
{
NSMutableArray *name;
}
@end
- (void)viewDidLoad
{
[super viewDidLoad];
name=[[NSMutableArray alloc]init];
[name addObject:@"ronak"];
[name addObject:@"vibha"];
[name addObject:@"shivani"];
[name addObject:@"nidhi"];
[name addObject:@"firdosh"];
[name addObject:@"himani"];
_tableview_outlet.delegate = self;
_tableview_outlet.dataSource = self;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [name count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [name objectAtIndex:indexPath.row];
return cell;
}
import UIKit
class TableViewController: UITableViewController
{
let tableViewModel = TableViewModel()
var product: [String] = []
var price: [String] = []
override func viewDidLoad()
{
super.viewDidLoad()
self.tableView.contentInset = UIEdgeInsetsMake( 20, 20 , 0, 0)
let priceProductDetails = tableViewModel.dataProvider()
for (key, value) in priceProductDetails
{
product.append(key)
price.append(value)
}
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return product.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = UITableViewCell(style: .Value1, reuseIdentifier: "UITableViewCell")
cell.textLabel?.text = product[indexPath.row]
cell.detailTextLabel?.text = price[indexPath.row]
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
print("You tapped cell number \(indexPath.row).")
}
}
样本表
#import "StartreserveViewController.h"
#import "CollectionViewController.h"
#import "TableViewCell1.h"
@interface StartreserveViewController ()
{
NSArray *name;
NSArray *images;
NSInteger selectindex;
}
@end
@implementation StartreserveViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor blueColor];
_startReservetable.backgroundColor = [UIColor blueColor];
name = [[NSArray alloc]initWithObjects:@"Mobiles",@"Costumes",@"Shoes",
nil];
images = [[NSArray
alloc]initWithObjects:@"mobilestitle.jpg",@"costumetitle.jpeg",
@"shoestitle.png",nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
pragma标记-UiTableview数据源
h
#导入
@接口StartRetServeViewController:
UIViewController
@属性(强,非原子)IBUITableView*StartServeTable;
@结束
vc.m
导入“secondViewController.h”
vc.m
尝试定义单元格的高度。行高不是单元格的高度吗?我把它设置为45,这应该是足够的空间了…哦,是的,那会有用的,我认为你定义了一个错误的方法,应该是didSelect,而不是didSelect。我认为你可以使用segue,如果它存在于你的故事板中,但你仍然需要实现
tableView:didSelectRowAtIndexPath:
,并以编程方式执行segue,这与目的背道而驰。@tapi,是的,我知道,我没有看到她的一些代码,我还以为OP试图直接从一个单元格生成序列。我只是尝试添加tableView:didSelectRowAtIndexPath:并在主体performsguewithidentifier中。。。但这是行不通的。我想我会试着在code@user1697845,它应该可以工作——你确定你在IB和代码中的segue名称相同吗?@user1697845,为什么当你在IB中有表视图时,你要删除它并在代码中重做它?只是好奇。最好每次都记得这和这里已经给出的7个答案有什么不同?当给出答案时,最好给出正确答案。
#import "ViewController.h"
@interface ViewController ()
{
NSMutableArray *name;
}
@end
- (void)viewDidLoad
{
[super viewDidLoad];
name=[[NSMutableArray alloc]init];
[name addObject:@"ronak"];
[name addObject:@"vibha"];
[name addObject:@"shivani"];
[name addObject:@"nidhi"];
[name addObject:@"firdosh"];
[name addObject:@"himani"];
_tableview_outlet.delegate = self;
_tableview_outlet.dataSource = self;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [name count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = @"cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [name objectAtIndex:indexPath.row];
return cell;
}
import UIKit
class TableViewController: UITableViewController
{
let tableViewModel = TableViewModel()
var product: [String] = []
var price: [String] = []
override func viewDidLoad()
{
super.viewDidLoad()
self.tableView.contentInset = UIEdgeInsetsMake( 20, 20 , 0, 0)
let priceProductDetails = tableViewModel.dataProvider()
for (key, value) in priceProductDetails
{
product.append(key)
price.append(value)
}
}
override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int
{
return product.count
}
override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
let cell = UITableViewCell(style: .Value1, reuseIdentifier: "UITableViewCell")
cell.textLabel?.text = product[indexPath.row]
cell.detailTextLabel?.text = price[indexPath.row]
return cell
}
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
print("You tapped cell number \(indexPath.row).")
}
}
#import "StartreserveViewController.h"
#import "CollectionViewController.h"
#import "TableViewCell1.h"
@interface StartreserveViewController ()
{
NSArray *name;
NSArray *images;
NSInteger selectindex;
}
@end
@implementation StartreserveViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor blueColor];
_startReservetable.backgroundColor = [UIColor blueColor];
name = [[NSArray alloc]initWithObjects:@"Mobiles",@"Costumes",@"Shoes",
nil];
images = [[NSArray
alloc]initWithObjects:@"mobilestitle.jpg",@"costumetitle.jpeg",
@"shoestitle.png",nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
(NSInteger)section
{
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellId = @"tableview";
TableViewCell1 *cell =[tableView dequeueReusableCellWithIdentifier:cellId];
cell.cellTxt .text = [name objectAtIndex:indexPath.row];
cell.cellImg.image = [UIImage imageNamed:[images
objectAtIndex:indexPath.row]];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
(NSIndexPath *)indexPath
{
selectindex = indexPath.row;
[self performSegueWithIdentifier:@"second" sender:self];
}
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:@"second"])
{
CollectionViewController *obj = segue.destinationViewController;
obj.receivename = [name objectAtIndex:selectindex];
}
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
@end
#import <UIKit/UIKit.h>
@interface StartreserveViewController :
UIViewController<UITableViewDelegate,UITableViewDataSource>
@property (strong, nonatomic) IBOutlet UITableView *startReservetable;
@end
#import "ViewController.h"
@interface ViewController ()
{
NSArray *cityArray;
NSArray *citySubTitleArray;
NSArray *cityImage;
NSInteger selectindexpath;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
cityArray = [[NSArray
alloc]initWithObjects:@"Coimbatore",@"Salem",@"Chennai",nil];
citySubTitleArray = [[NSArray alloc]initWithObjects:@"1",@"2",@"3", nil];
cityImage = [[NSArray alloc]initWithObjects:@"12-300x272.png"
, @"380267_70d232fc33b44d4ebe7b42bbe63ee9be.png",@"apple-logo_318
-40184.png", nil];
}
#pragma mark - UITableView Data Source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger) tableView:(UITableView *)tableView numberOfRowsInSection
:(NSInteger)section
{
return cityImage.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellId = @"city";
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:cellId];
if (cell == nil)
{
cell = [[UITableViewCell
alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellId];
}
cell.textLabel.text = [cityArray objectAtIndex:indexPath.row];
cell.detailTextLabel.text = [citySubTitleArray objectAtIndex:indexPath.row];
cell.imageView.image = [UIImage imageNamed:
[cityImage objectAtIndex:indexPath.row]];
// NSData *data = [[NSData alloc]initWithContentsOfURL:
[NSURL URLWithString:@""]];
// cell.imageView.image = [UIImage imageWithData:data];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath
: (NSIndexPath *)indexPath
{
NSLog(@"---- %@",[cityArray objectAtIndex:indexPath.row]);
NSLog(@"----- %@",[cityImage objectAtIndex:indexPath.row]);
selectindexpath=indexPath.row;
[self performSegueWithIdentifier:@"second" sender:self];
}
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little p
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
if ([segue.identifier isEqualToString:@"second"])
{
secondViewController *object=segue.destinationViewController;
object.cityName=[cityArray objectAtIndex:selectindexpath];
object.cityImage=[cityImage objectAtIndex:selectindexpath];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController<UITableViewDataSource
, UITableViewDelegate>
@property (strong, nonatomic) IBOutlet UITableView *cityLabelList;
@end
#import <UIKit/UIKit.h>
@interface secondViewController : UIViewController
@property(strong, nonatomic) NSString *cityName;
@property(strong,nonatomic)NSString *cityImage;
@end
#import "secondViewController.h"
@interface secondViewController ()
@property (strong, nonatomic) IBOutlet UILabel *lbl_desc;
@property (strong, nonatomic) IBOutlet UIImageView *img_city;
@end
@implementation secondViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.title=self.cityName;
if ([self.cityName isEqualToString:@"Coimbatore"])
{
self.lbl_desc.text=@"Coimbatore city";
self.img_city.image=[UIImage imageNamed:
[NSString stringWithFormat:@"%@",self.cityImage]];
}
else if ([self.cityName isEqualToString:@"Chennai"])
{
self.lbl_desc.text= @"Chennai City Gangstar";
self.img_city.image=[UIImage imageNamed:
[NSString stringWithFormat:@"%@",self.cityImage]];
}
else
{
self.lbl_desc.text= @"selam City";
self.img_city.image=[UIImage imageNamed:
[NSString stringWithFormat:@"%@",self.cityImage]];
}
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}