ios Swift 3：无法识别的选择器发送到实例 Xcode 8
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Swift 3: Unrecognized selector sent to instance Xcode 8
提问by Raul
I have programmatically created an UIViewand added UIPanGestureRecognizerto it:
我以编程方式创建了一个UIView并添加UIPanGestureRecognizer到其中：
class ViewController: UIViewController{
var preludeView: UIView!
override func viewDidLoad() {
super.viewDidLoad()
initViews()
createConstrants()
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: Selector(("handleTap:")))
preludeView.addGestureRecognizer(panGestureRecognizer)
}
func handleTap(recognizer: UIPanGestureRecognizer) {
print("WORKING!!!!")
}
func initViews() {
...
}
func createConstrants() {
...
}
}
But when I am touching the view Xcode is throwing an error:
但是当我触摸视图时，Xcode 抛出一个错误：
2016-07-13 09:24:29.918 Draft_Hypa_02[661:83024] -[Draft_Hypa_02.ViewController handleTap:]: unrecognized selector sent to instance 0x17d94a10 2016-07-13 09:24:29.921 Draft_Hypa_02[661:83024] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Draft_Hypa_02.ViewController handleTap:]: unrecognized selector sent to instance 0x17d94a10' *First throw call stack: (0x249cf91b 0x2416ae17 0x249d52b5 0x249d2ee1 0x248fe238 0x294ae9eb 0x290e984f 0x28f7aff1 0x294afd4f 0x28f3ba57 0x28f38017 0x28f78ec9 0x28f7867b 0x28f49125 0x28f476d3 0x24991dff 0x249919ed 0x2498fd5b 0x248df229 0x248df015 0x25ecfac9 0x28fb1189 0x93144 0x24587873) libc++abi.dylib: terminating with uncaught exception of type NSException
2016年7月13日09：24：29.918 Draft_Hypa_02 [661：83024] - [Draft_Hypa_02.ViewController handleTap：]：无法识别的选择发送到实例0x17d94a10 2016年7月13日09：24：29.921 Draft_Hypa_02 [661：83024] *终止应用程序由于未捕获的异常'NSInvalidArgumentException'，原因是： ' - [Draft_Hypa_02.ViewController handleTap：]：发送到实例0x17d94a10无法识别的选择' *第一掷调用堆栈：（0x249cf91b 0x2416ae17 0x249d52b5 0x249d2ee1 0x248fe238 0x294ae9eb 0x290e984f 0x28f7aff1 0x294afd4f 0x28f3ba57 0x28f38017 0x28f78ec9 0x28f7867b 0x28f49125 0x28f476d3 0x24991dff 0x249919ed 0x2498fd5b 0x248df229 0x248df015 0x25ecfac9 0x28fb1189 0x93144 0x24587873) libc++abi.dylib：NSException 类型异常终止
However, if I remove argument in the handleTapfunction and remove the colon in the Selector(("handleTap:")), everything works fine!
但是，如果我删除函数中的handleTap参数并删除 中的冒号，则Selector(("handleTap:"))一切正常！
Already spent a day to try to fix this issue and would be very appreciate for your help!
已经花了一天时间尝试解决此问题，非常感谢您的帮助！
回答by Nirav D
If you are using swift3 your selectorshould be like this
如果你使用swift3 你selector应该是这样的
#selector(self.handleTap(recognizer:))
回答by Mahendra Y
You should write this statement in different way. use following line
您应该以不同的方式编写此语句。使用以下行
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(ViewController.handleTap(_:)))
让 panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(ViewController.handleTap(_:)))
instead of
代替
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: Selector(("handleTap:")))
让 panGestureRecognizer = UIPanGestureRecognizer(target: self, action: Selector(("handleTap:")))
New Way
新方法
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(YourViewController.handleTap(_:)))
让 panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(YourViewController.handleTap(_:)))
回答by Diogo Antunes
class ViewController: UIViewController {
let customView = UIView()
override func viewDidLoad() {
super.viewDidLoad()
let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: #selector(handleTap(_:)))
customView.addGestureRecognizer(panGestureRecognizer)
}
func handleTap(panGesture: UIPanGestureRecognizer) {
}
}
Don't forget to add your custom UIView to the VC.
不要忘记将您的自定义 UIView 添加到 VC。
