如何在UIAlertController之后在键窗口中显示视图

How to show view on the keywindow after UIAlertController

提问人:代思思 提问时间:12/24/2017 更新时间:12/24/2017 访问量:134

问:

我想做一个保存图片功能,成功后弹出提示。当我按下图片弹出alertController,保存成功时没有看到按键窗口上显示的提示框,这是怎么回事?

 //show the tip of suceess
-(void)show{
UIWindow * window =[UIApplication sharedApplication].keyWindow;
[window addSubview:self];
[self mas_makeConstraints:^(MASConstraintMaker *make) {
    make.top.equalTo(window.mas_top);
    make.leading.equalTo(window.mas_leading);
    make.trailing.equalTo(window.mas_trailing);
    make.bottom.equalTo(window.mas_bottom);
}];
[self layoutIfNeeded];


self.alpha = 0;
[UIView animateWithDuration:.2 animations:^{
    self.alpha = 1;
}];

_alertView.transform = CGAffineTransformMakeScale(0.1, 0.1);
[UIView animateWithDuration:0.3 delay:0.0 usingSpringWithDamping:0.7 initialSpringVelocity:1 options:UIViewAnimationOptionCurveEaseOut animations:^{
    _alertView.alpha=1.0;
    _alertView.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished) {

}];

}

iOS UIAlloxyController 键窗口

评论


答:

0赞 Shehata Gamal 12/24/2017 #1

试试这个

 // Delay execution of my block for 10 seconds.
 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 10 * NSEC_PER_SEC),     dispatch_get_main_queue(), ^{

         UIView * windowView =[UIApplication sharedApplication].keyWindow.rootViewController.view;
        [windowView addSubview:self];


 });

评论

0赞 代思思 12/24/2017
谢谢你的回答!但它不起作用。keywindow 和 keyWindow.rootViewController.view 有什么区别吗?
0赞 代思思 12/24/2017
谢谢 ! 这次成功了!但我不知道为什么。
0赞 代思思 12/24/2017
我也有一个问题。当keyWindow窗口上的ImageView的时,成功的提示总是显示在ImageView的下面。所以我看不到提示,我可以做什么
0赞 Shehata Gamal 12/24/2017
检查约束是否也使 self.translatesAutoresizingMaskIntoConstraints = NO