在iOS 11 beta 7上测试我的应用程序 – 如果我的UIViewController,键盘似乎没有推高内容.
代码看起来像这样(从iOS7开始工作)：
- (void)handleNotification:(NSNotification*)notification {
if (notification.name == UIKeyboardWillShowNotification) {
CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
nextButtonALBottomdistance.constant = keyboardSize.height + initialPhoneBottomdistance;
codeBottomViewALBottomdistance.constant = keyboardSize.height + initialCodeBottomdistance;
double animationDuration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:animationDuration animations:^{
[self.view layoutIfNeeded];
}];
}
else if (notification.name == UIKeyboardWillHideNotification) {
nextButtonALBottomdistance.constant = initialPhoneBottomdistance;
codeBottomViewALBottomdistance.constant = initialCodeBottomdistance;
double animationDuration = [[[notification userInfo] objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:animationDuration animations:^{
[self.view layoutIfNeeded];
}];
}
}
有趣的是 – 当我按下主页按钮(最小化应用程序)并重新打开它(没有杀死它)时 – 布局是固定的.
它似乎是一个iOS 11测试版的bug,但到目前为止我找不到它的任何引用.
很高兴知道其他人是否有这个问题.
解决方法
使用UIKeyboardFrameEndUserInfoKey,因为该键用于包含CGRect的NSValue对象,该CGRect在屏幕坐标中标识键盘的结束帧.不要使用UIKeyboardFrameBeginUserInfoKey.