如何在UIView transitionWithView之后运行代码？

Question

我希望在动画完成后运行一段代码，但编译器显示以下错误：＆＃34;不兼容的块指针类型发送＆＃39; void（^）（void）＆＃39;参数类型＆＃39; void（^）（BOOL）＆＃39;＆＃34;

这是我的代码，我不确定我做错了什么，请帮助，谢谢。

[UIView transitionWithView:self.view duration:1.5
                   options:UIViewAnimationOptionTransitionFlipFromBottom //change to whatever animation you like
                animations:^ {
                    [self.view addSubview:myImageView1];
                    [self.view addSubview:myImageView2];
                }
                completion:^ {
                    NSLog(@"Animations completed.");
                    // do something...
                }];

Answer 1

你只是有错误的块类型:)它需要一个像下面这样的块。关键是^(BOOL finished) {...}

[UIView transitionWithView:self.view duration:1.5
                   options:UIViewAnimationOptionTransitionFlipFromBottom //change to whatever animation you like
                animations:^ {
                    [self.view addSubview:myImageView1];
                    [self.view addSubview:myImageView2];
                }
                completion:^(BOOL finished){
                    if (finished) {
                        // Successful
                    }
                    NSLog(@"Animations completed.");
                    // do something...
                }];