在以编程方式创建的 UITextView 上捕获 UITapGesture

Question

我正在以编程方式创建 UITextView（的子类），并希望在用户点击创建的 UITextView 时显示弹出视图或其他内容。显示弹出视图不是我的问题，但捕捉点击手势是：

func createCustomText(text:String){
    var tvControl = CustomTextView(frame: CGRectMake(CGFloat(Int.random(50...100)), 
        CGFloat(Int.random(50...100)), 100, 30))
    tvControl.text = text
    baseView.addSubview(tvControl)
    tvControl.font = UIFont(name: "BigruixianthinGB1.0", size: 12)
    tvControl.backgroundColor = UIColor.clearColor()
    activeTextView = tvControl
    var tapRecognizer = UITapGestureRecognizer(target:tvControl, action:"detectTap:")
    tvControl.gestureRecognizers = [tapRecognizer]
}

func detectTap(recognizer: UITapGestureRecognizer) {
    println("tap tap")
}

但是会导致错误：

2015-08-12 10:35:13.665 My App[7030:481148] -[My_App.CustomTextView detectTap:]: unrecognized selector sent to instance 0x7fe8ba813200 2015-08-12 10:35:13.673 My App[7030:481148] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[My_App.CustomTextView detectTap:]: unrecognized selector sent to instance 0x7fe8ba813200'

Answer 1

错误的原因是 UITapGestureRecognizer 的 target 设置为 tvControl 这意味着 detectTap: 将在 [= 的实例上调用15=].

手势识别器的 target 应设置为 self:

var tapRecognizer = UITapGestureRecognizer(target:self, action:"detectTap:")

在以编程方式创建的 UITextView 上捕获 UITapGesture

Catch UITapGesture on programmatically created UITextView

swift

uitapgesturerecognizer