我需要通过按钮将 PostList[indexPath.row].id 传递给另一个 View Controller ，而不选择所有单元格:
class UserNewFeeds: UIViewController, UITableViewDataSource, UITableViewDelegate {
let Shamar_URL = NSURL(string: "http://127.0.0.1/jadeed/fetchtimeline.php")
var PostList = Array<Feeds>()
var refresh = UIRefreshControl()
@IBOutlet weak var CollectionList: UITableView!
override func viewDidLoad() {
super.viewDidLoad()
LoadNewFeeds()
CollectionList.reloadData()
}
var FeedUser : String?
@IBAction func refresh(_ sender: Any) {
CollectionList.reloadData()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return PostList.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let Cell:NewFeedsCell = tableView.dequeueReusableCell(withIdentifier: "Feed", for: indexPath) as! NewFeedsCell
Cell.Userimg.image = #imageLiteral(resourceName: "User")
Cell.Fullname.text = PostList[indexPath.row].name
Cell.Username.text = PostList[indexPath.row].username
Cell.DatePost.text = PostList[indexPath.row].date
Cell.PostView.text = PostList[indexPath.row].body
Cell.PostID.text = PostList[indexPath.row].id
Cell.come.tag = indexPath.row
Cell.come.addTarget(self, action: #selector(UserNewFeeds.Connect), for: .touchUpInside)
print(Cell.come.tag)
return Cell
}
func Connect(_ sender: Any, event: Any, segue: UIStoryboardSegue) {
performSegue(withIdentifier: "ID_Post", sender: sender)
let touches = (event as AnyObject).allTouches!
let touch = touches?.first!
let currentTouchPosition = touch?.location(in: CollectionList)
var indexPath = CollectionList.indexPathForRow(at: currentTouchPosition!)!
if segue.identifier == "ID_Post" {
let testCon = segue.destination as! UserComments
testCon.id_post = PostList[indexPath.row].id
print(PostList[indexPath.row].id!)
}
print("position:\(indexPath.row)")
}
override func viewWillAppear(_ animated: Bool) {
CollectionList.estimatedRowHeight = 220
CollectionList.rowHeight = UITableViewAutomaticDimension
}
func LoadNewFeeds() {
let request = NSMutableURLRequest(url: Shamar_URL! as URL)
let task = URLSession.shared.dataTask(with: request as URLRequest){
data, response, error in
if error != nil{
print("error is \(error!)")
return;
}
DispatchQueue.main.async(execute: {
do {
let myJSON = try JSONSerialization.jsonObject(with: data!, options: .mutableContainers) as? [String:Any]
let parseJSON = myJSON
let PostList = parseJSON?["Timeline"] as! [[String:Any]]
DispatchQueue.global().sync {
self.PostList.removeAll()
for post in PostList {
self.PostList.append(Feeds(name: post["name"]! as! String , username: post["post_by"]! as! String , body: post["body"]! as! String , date: post["post_date"]! as! String, id: post["id_post"]! as! String))
}
self.CollectionList.reloadData()
}
} catch {
print(error)
}
})
}
task.resume()
}
}
我正在尝试使用这个函数但是失败了:
func Connect(_ sender: Any, event: Any, segue: UIStoryboardSegue) {
performSegue(withIdentifier: "ID_Post", sender: sender)
let touches = (event as AnyObject).allTouches!
let touch = touches?.first!
let currentTouchPosition = touch?.location(in: CollectionList)
var indexPath = CollectionList.indexPathForRow(at: currentTouchPosition!)!
if segue.identifier == "ID_Post" {
let testCon = segue.destination as! UserComments
testCon.id_post = PostList[indexPath.row].id
print(PostList[indexPath.row].id!)
}
print("position:\(indexPath.row)")
}
这是错误:
2017-10-02 03:44:41.235 Al-Jadeed[31709:211436] -[UITouchesEvent identifier]: unrecognized selector sent to instance 0x6000000f0400
2017-10-02 03:44:41.326 Al-Jadeed[31709:211436] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UITouchesEvent identifier]: unrecognized selector sent to instance 0x6000000f0400'
*** First throw call stack:
(
0 CoreFoundation 0x000000010b5edb0b __exceptionPreprocess + 171
1 libobjc.A.dylib 0x000000010ac3d141 objc_exception_throw + 48
2 CoreFoundation 0x000000010b65d134 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 CoreFoundation 0x000000010b574840 ___forwarding___ + 1024
4 CoreFoundation 0x000000010b5743b8 _CF_forwarding_prep_0 + 120
5 Al-Jadeed 0x000000010a46ddba _TFC9Al_Jadeed12UserNewFeeds7ConnectfTP_5eventP_5segueCSo17UIStoryboardSegue_T_ + 1850
6 Al-Jadeed 0x000000010a46e689 _TToFC9Al_Jadeed12UserNewFeeds7ConnectfTP_5eventP_5segueCSo17UIStoryboardSegue_T_ + 121
7 UIKit 0x000000010c359d82 -[UIApplication sendAction:to:from:forEvent:] + 83
8 UIKit 0x000000010c4de5ac -[UIControl sendAction:to:forEvent:] + 67
9 UIKit 0x000000010c4de8c7 -[UIControl _sendActionsForEvents:withEvent:] + 450
10 UIKit 0x000000010c4dd802 -[UIControl touchesEnded:withEvent:] + 618
11 UIKit 0x000000010c8831f9 _UIGestureEnvironmentSortAndSendDelayedTouches + 5553
12 UIKit 0x000000010c87e210 _UIGestureEnvironmentUpdate + 1409
13 UIKit 0x000000010c87dc43 -[UIGestureEnvironment _deliverEvent:toGestureRecognizers:usingBlock:] + 484
14 UIKit 0x000000010c87ce0a -[UIGestureEnvironment _updateGesturesForEvent:window:] + 274
15 UIKit 0x000000010c3c8eea -[UIWindow sendEvent:] + 4092
16 UIKit 0x000000010c375a84 -[UIApplication sendEvent:] + 352
17 UIKit 0x000000010cb595d4 __dispatchPreprocessedEventFromEventQueue + 2926
18 UIKit 0x000000010cb51532 __handleEventQueue + 1122
19 CoreFoundation 0x000000010b593c01 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
20 CoreFoundation 0x000000010b5790cf __CFRunLoopDoSources0 + 527
21 CoreFoundation 0x000000010b5785ff __CFRunLoopRun + 911
22 CoreFoundation 0x000000010b578016 CFRunLoopRunSpecific + 406
23 GraphicsServices 0x00000001114f6a24 GSEventRunModal + 62
24 UIKit 0x000000010c358134 UIApplicationMain + 159
25 Al-Jadeed 0x000000010a4bed67 main + 55
26 libdyld.dylib 0x000000010f73a65d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
最佳答案
您的转换失败是因为您发送的是 ViewController 作为 segue 的发送者，而不是按钮。
将您的 Connect 方法更改为:
func Connect(sender: UIButton) {
performSegue(withIdentifier: "ID_Post", sender: sender)
}
现在更改按钮的选择器，使其将自身作为参数发送(并正确设置标签):
Cell.come.tag = indexPath.row
Cell.come.addTarget(self, action: #selector(UserNewFeeds.Connect(_:)), for: .touchUpInside)
关于ios - 通过其中的按钮从 UITableViewCell 传递数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/46516388/