Ios 选择didselectitem后如何从集合视图导航到另一个集合视图
我一直在尝试制作一个项目,该项目的内容应该是Ios 选择didselectitem后如何从集合视图导航到另一个集合视图,ios,swift,uinavigationcontroller,uicollectionview,Ios,Swift,Uinavigationcontroller,Uicollectionview,我一直在尝试制作一个项目,该项目的内容应该是collectionView,在从中选择一个项目后,该项目将被另一个collectionView import UIKit class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate { @IBOutlet weak var myCollectionView: UICollectionView! var imgURLArray
collectionView
,在从中选择一个项目后,该项目将被另一个collectionView
import UIKit
class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate {
@IBOutlet weak var myCollectionView: UICollectionView!
var imgURLArray = [String]()
var nameArray = [String]()
final let urlString = "https://unembittered-vector.000webhostapp.com/JSON/alljson.txt"
override func viewDidLoad() {
super.viewDidLoad()
self.downloadJsonWithURL()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func downloadJsonWithURL() {
let url = NSURL(string: urlString)
URLSession.shared.dataTask(with: (url as? URL)!, completionHandler: {(data, response, error) -> Void in
if let jsonObj = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? NSDictionary {
print(jsonObj!.value(forKey: "Materials")!)
if let actorArray = jsonObj!.value(forKey: "Materials") as? NSArray {
for actor in actorArray{
if let actorDict = actor as? NSDictionary {
if let name = actorDict.value(forKey: "name") {
self.nameArray.append(name as! String)
}/*
if let name = actorDict.value(forKey: "dob") {
self.dobArray.append(name as! String)
} */
if let name = actorDict.value(forKey: "image") {
self.imgURLArray.append(name as! String)
}
}
}
}
OperationQueue.main.addOperation({
self.myCollectionView.reloadData()
})
}
}).resume()
}
func downloadJsonWithTask() {
let url = NSURL(string: urlString)
var downloadTask = URLRequest(url: (url as? URL)!, cachePolicy: URLRequest.CachePolicy.reloadIgnoringCacheData, timeoutInterval: 20)
downloadTask.httpMethod = "GET"
URLSession.shared.dataTask(with: downloadTask, completionHandler: {(data, response, error) -> Void in
let jsonData = try? JSONSerialization.jsonObject(with: data!, options: .allowFragments)
print(jsonData!)
}).resume()
}
//Number of views
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return imgURLArray.count
}
//Populate view
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! myCell
print("test")
cell.nameLabel.text = nameArray[indexPath.row]
let imgURL = NSURL(string: imgURLArray[indexPath.row])
if imgURL != nil {
print("check")
let data = NSData(contentsOf: (imgURL as? URL)!)
//cell.myImageView.image = UIImage(data: data as! Data)
cell.myImageView.image = UIImage(data: data as! Data)
}
else{
print("error")}
//cell.myImageView.image = UIImage(named: array[indexPath.row] + ".JPG")
return cell
}
/*func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
let vc = self.storyboard?.instantiateViewController(withIdentifier: "ViewController") as! ViewController
//vc.imageString = imgURLArray[indexPath.row]
//vc.nameString = nameArray[indexPath.row]
//vc.dobString = dobArray[indexPath.row]
//cell.myImageView.image = UIImage(named: array[indexPath.row] + ".JPG")
//return cell1
//self.navigationController?.pushViewController(vc, animated: true)
}*/
}
下面是一个关于如何实现所需内容的示例: 1。情节提要 2。视图控制器
import UIKit
class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate
{
override func viewDidLoad()
{
super.viewDidLoad()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return 10
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath)
{
let controller = self.storyboard?.instantiateViewController(withIdentifier: "SecondViewController") as! SecondViewController
self.navigationController?.pushViewController(controller, animated: true)
}
}
class SecondViewController: UIViewController, UICollectionViewDataSource
{
override func viewDidLoad()
{
super.viewDidLoad()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
{
return 5
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
{
return collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)
}
}
如果您面临任何问题,请回复。您面临的问题是什么?我是ios的新手。。我想在上面代码中的集合视图中单击项目后转到另一个集合视图。请告诉我们您到底想要什么。如果你们能帮助我从集合视图导航到另一个视图(不是详细视图,而是另一个集合视图),我将不胜感激@PGDEV您可以从一个UIViewController导航到另一个UIViewController。这就是你想要的吗?你实现了你所需要的吗?你能帮我举一个集合视图的例子吗?集合视图使用图像从json加载数据,并从视图中单击一个项目导航到另一个使用集合视图的页面,集合视图再次从json加载数据@PGDevYes,但我还不能导航到另一个集合视图