UILabel *cover = [[UILabel alloc] init];
cover.frame = CGRectMake(0, 0, 150, 30);
cover.center = CGPointMake(self.view.frame.size.width * 0.5, self.view.frame.size.height * 0.5);
cover.font = [UIFont systemFontOfSize:12];
cover.text = [NSString stringWithFormat:@"成功安装%@", app.name];
cover.textColor = [UIColor whiteColor];
cover.textAlignment = NSTextAlignmentCenter;
cover.backgroundColor = [UIColor blackColor];
cover.alpha = 0.0;
cover.clipsToBounds = YES;
cover.layer.cornerRadius = 5;
[self.view addSubview:cover];
[UIView animateWithDuration:0.5 animations:^{
cover.alpha = 0.5;
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.5 delay:0.5 options:UIViewAnimationOptionCurveEaseInOut animations:^{
cover.alpha = 0.0;
} completion:^(BOOL finished) {
[cover removeFromSuperview];
}];
}];