自定义单元错误addTarget按钮 [英] Custom Cell error addTarget button
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问题描述
我创建了一个布局，如下所示:在Storyborad中，我有一个包含表视图的视图，并且关联了类 TableViewController .然后，我创建了一个具有自定义单元格的新视图，并为其分配了 CustomCell 类.
I created a layout as follows: in storyborad I have a view that contains a table view and I associate the Class TableViewController. Then I created a new View with a custom cell and assigned to it the class CustomCell.
尝试将操作分配给按钮时遇到问题.由于各种原因，我需要在TableViewController中分配操作.
I have problems when I try to assign an action to the button. For various reasons I need to assign the action in TableViewController.
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:
And this is my 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")
}
运行此命令时，出现错误:
When i run this, get me a error:
*** 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)
推荐答案
之所以不起作用，是因为您将委托设置为"cellCustom"而不是视图控制器.替换此行:
The reason this is not working is because you are setting the delegate as "cellCustom" and not as the view controller. Replace this line:
cellCustom.customButton.addTarget(cellCustom, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)
与此:
cellCustom.customButton.addTarget(self, action: "buttonAction:", forControlEvents: UIControlEvents.TouchUpInside)
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