我正在尝试使用样式.actionSheet的默认AlertViewController。出于某种原因,警报会导致约束错误。只要通过按钮没有触发alertController(被显示),整个视图上就没有约束错误。这可能是Xcode的bug吗?
我收到的确切错误看起来像这样:
2019-04-12 15:33:29.584076+0200 Appname[4688:39368] [LayoutConstraints] Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(
"<NSLayoutConstraint:0x6000025a1e50 UIView:0x7f88fcf6ce60.width == - 16 (active)>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x6000025a1e50 UIView:0x7f88fcf6ce60.width == - 16 (active)>
这是我使用的代码:
@objc func changeProfileImageTapped(){
print("ChangeProfileImageButton tapped!")
let alert = UIAlertController(title: "Change your profile image", message: nil, preferredStyle: .actionSheet)
alert.addAction(UIAlertAction(title: "Photo Library", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Online Stock Library", style: .default, handler: nil))
alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
alert.view.tintColor = ColorCodes.logoPrimaryColor
self.present(alert, animated: true)
}
正如您所看到的,这是非常基础的。这就是为什么我对我得到的奇怪行为感到非常困惑,因为这个默认实现不应该引起任何错误,对吧?
虽然通过打破限制,警报在所有屏幕尺寸上都能正常显示,但我会非常感谢任何帮助。