问题描述
UITapGestureRecogniser 开始状态不被识别,只有结束被识别。
override func viewDidLoad() {
let tapgr = UITapGestureRecognizer(target: self,action: #selector(tapTrigger(recongizer:)))
bottomBar.addGestureRecognizer(tapgr)
}
@objc func tapTrigger(recongizer: UITapGestureRecognizer){
if recongizer.state == .began{
print("recognised") // does not print
}else if recogniser.state == .ended{
print("ended") //prints
}
}
我想要做的是在识别触摸时突出显示视图(而不是添加识别器的视图),并在取消触摸时取消突出显示。
解决方法
您可以使用 UITapGestureRecognizer
来获取不同的状态,而不是使用 UILongPressGestureRecognizer
。
像这样:
let tapgr = UILongPressGestureRecognizer(target: self,action: #selector(tapTrigger(recongizer:)))
tapgr.minimumPressDuration = 0
bottomBar.addGestureRecognizer(tapgr)
@objc func tapTrigger(recongizer: UITapGestureRecognizer){
if recongizer.state == .began{
print("recognised")
} else if recongizer.state == .ended{
print("ended") //prints
}
}