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ytyubox / YuBlog

這是用來記錄的Blog，紀錄內容在 Issues 頁面中。
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20190309 對於addTarget的雷區 #5

Open ytyubox opened 5 years ago

ytyubox commented 5 years ago

Button在指定Target時有３個雷區

  1. addTarget before init
  2. Button on scrollViiew
  3. Button on a !!!userInteractable superView

A1: 

lazy var button: UIButton = {
    let button = UIButton()
    button.addTarget(self,#selector(aSelector), .touchUpInside)
    return button
}()

A2:

scrollView.isExclusiveTouch = true
scrollView.delaysContentTouches = false

A3:

button.superView.isUserInteractionEnabled = true