自定义单元格错误addTargetbutton
我创build了一个布局如下：在storyborad我有一个视图，包含一个表视图，我关联类TableViewController 。 然后，我创build了一个新的视图与自定义单元格，并分配给它的类CustomCell 。
当我尝试将操作分配给button时遇到问题。 由于各种原因，我需要在TableViewController中分配操作。
这是我的代码：
这是CustomCell：
class CustomCategoryTableViewCell:UITableViewCell { @IBOutlet weak var customButton: UIButton! @IBOutlet weak var title: UILabel! override func awakeFromNib() { super.awakeFromNib() } override func setSelected(selected: Bool, animated: Bool) { super.setSelected(selected, animated: animated) println("Cell is selected.") } } 这是我的TableViewController：
override func viewDidLoad() { super.viewDidLoad() // Register custom cell var nib = UINib(nibName: "CategoryCell", bundle: nil) tableView.registerNib(nib, forCellReuseIdentifier: "CustomCellCategory") …more code } override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { println("numero rihe \(myArray.count)") return myArray.count } override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { let cellCustom:CustomCategoryTableViewCell = tableView.dequeueReusableCellWithIdentifier("CustomCellCategory") as CustomCategoryTableViewCell // Button cellCustom.customButton.tag = indexPath.row println("current level: \(myArray[indexPath.row].level)") if (myArray[indexPath.row].level > 0){ var puppy="" for (var i = 0; i < myArray[indexPath.row].level; i++){ puppy += " " } cellCustom.title.text = "\(puppy)-\(myArray[indexPath.row].nameCategory)" }else{ cellCustom.title.text = myArray[indexPath.row].nameCategory } // Setto button aperto/chiuso if (myArray[indexPath.row].isOpen){ var image = UIImage(named: "item-icon-folder.png"); cellCustom.customButton.setBackgroundImage(image, forState: UIControlState.Normal) }else{ var image = UIImage(named: "item-icon-folder-selected.png"); cellCustom.customButton.setBackgroundImage(image, forState: UIControlState.Normal) } //cellCustom.customButton(cellCustom, action:"searchChild", forControlEvents: UIControlEvents.TouchUpInside) // Nascondo Button. if (!myArray[cellCustom.customButton.tag].hasChild){ print("Non ha figli") cellCustom.customButton.hidden = true var image = UIImage(named: "item-counter.png"); cellCustom.customButton.setBackgroundImage(image, forState: UIControlState.Normal) } cellCustom.customButton.addTarget(cellCustom, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside) cellCustom.title.numberOfLines = 3 cellCustom.title.lineBreakMode = .ByWordWrapping return cellCustom } func buttonAction(sender:UIButton!) { println(“tapped”) }
当我运行这个，给我一个错误：
*** First throw call stack: ( 0 CoreFoundation 0x000000010c574f35 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x000000010e0b8bb7 objc_exception_throw + 45 2 CoreFoundation 0x000000010c57c04d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205 3 CoreFoundation 0x000000010c4d427c ___forwarding___ + 988 4 CoreFoundation 0x000000010c4d3e18 _CF_forwarding_prep_0 + 120 5 UIKit 0x000000010ce018be -[UIApplication sendAction:to:from:forEvent:] + 75 6 UIKit 0x000000010cf08410 -[UIControl _sendActionsForEvents:withEvent:] + 467 7 UIKit 0x000000010cf077df -[UIControl touchesEnded:withEvent:] + 522 8 UIKit 0x000000010d1ae540 _UIGestureRecognizerUpdate + 9487 9 UIKit 0x000000010ce46ff6 -[UIWindow _sendGesturesForEvent:] + 1041 10 UIKit 0x000000010ce47c23 -[UIWindow sendEvent:] + 667 11 UIKit 0x000000010ce149b1 -[UIApplication sendEvent:] + 246 12 UIKit 0x000000010ce21a7d _UIApplicationHandleEventFromQueueEvent + 17370 13 UIKit 0x000000010cdfd103 _UIApplicationHandleEventQueue + 1961 14 CoreFoundation 0x000000010c4aa551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17 15 CoreFoundation 0x000000010c4a041d __CFRunLoopDoSources0 + 269 16 CoreFoundation 0x000000010c49fa54 __CFRunLoopRun + 868 17 CoreFoundation 0x000000010c49f486 CFRunLoopRunSpecific + 470 18 GraphicsServices 0x000000011066b9f0 GSEventRunModal + 161 19 UIKit 0x000000010ce00420 UIApplicationMain + 1282 20 XMLParser-Tutorial 0x000000010c24056e top_level_code + 78 21 XMLParser-Tutorial 0x000000010c2405aa main + 42 22 libdyld.dylib 0x000000010e892145 start + 1 ) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)
这是不工作的原因是因为您将代理设置为“cellCustom”而不是视图控制器。 replace这一行：
cellCustom.customButton.addTarget(cellCustom, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)
有了这个：
cellCustom.customButton.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
试试这个，
cellCustom.customButton.addTarget(self, action: "mybuttonAction:", forControlEvents: UIControlEvents.TouchUpInside)