iphone - 使用 block 排队动画

Question

在我的 didSelectRowAtIndexPath 方法中，我调用 [self dismissView]; 当用户选择一个单元格以便关闭 View (如果它已经显示)。这显然不是最优的，并且它在没有为 dismissView 设置动画的情况下覆盖了 presentView 方法。有一个更好的方法吗？或者至少让它等待 View 完成动画而不使用 NSTimer。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
{
    [self dismissView];

// Do xyz...

[self presentView:twitterLinksView];

然后..

- (void)presentView:(id)sender
{
    twitterLinksView.frame = CGRectMake(0, (self.view.frame.size.height + viewHeight), 320, 300);


    [UIView animateWithDuration:0.60f animations:^{


        CGRect twitterLinkFrame   = self.twitterLinksView.frame;
        twitterLinkFrame.origin.y = (self.view.frame.size.height - viewHeight);

        twitterLinksView.frame = twitterLinkFrame;
    }];
}

- (void)dismissView
{

    [UIView animateWithDuration:0.75f animations:^{

        CGRect twitterLinkFrame   = self.twitterLinksView.frame;
        twitterLinkFrame.origin.y = (self.view.frame.size.height + viewHeight);

        self.twitterLinksView.frame = twitterLinkFrame;
    }];
}

Answer 1

[UIView animateWithDuration:1. animations:^{

     //firstAnimationBlock

    } completion:^(BOOL finished){
        [UIView animateWithDuration:1. animations:^{

//animations in this block will be called after firstAnimationBlock has expired
        }];
    }];

据我了解，您想要一个接一个地发射 2 个动画。这段代码(嵌套block)使得这个

这部分是编辑后的:好的，现在你可以尝试这样写了

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath;
{
    [self dismissView];

// Do xyz...

[self performSelector:@selector(presentView:) withObject:twitterLinksView afterDelay:0.75];

//[self presentView:twitterLinksView];
}