iPhone加载视图“幻灯片效果”

Question

当您在我的应用程序中请求某些内容（例如按下按钮或其他任何内容）时，我希望实现这一点上滑效果”。我制作了一个简单的模型来很好地描述我想要实现的目标。你对我有什么暗示吗？谢谢。

注意：我不想拉动刷新效果（加载视图出现时屏幕不滚动，例如当您发送评论时出现）

更新：

我已经尝试过 Cirrostratus 代码：

- (IBAction)displayLoadingScreen:(id)sender
{
    NSLog(@"pressed");
    UIView *loadingView = [[UIView alloc] init];
    loadingView.frame = CGRectMake(0,-40,320,40);
    [loadingView setBackgroundColor:[UIColor blueColor]];
    [self.view addSubview:loadingView];
    //animate in within some method called when loading starts
    [UIView animateWithDuration:1.0
                     animations:^{ 
                         loadingView.frame = CGRectMake(0,0,320,40);
                     } 
                     completion:^(BOOL finished) {
                     }];
    for (int i = 0; i < 10000; i++) {
        NSLog(@"%d", i);
    }
    //animate out within some method called when loading ends
    [UIView animateWithDuration:1.0
                     animations:^{ 
                         loadingView.frame = CGRectMake(0,-40,320,40);
                     } 
                     completion:^(BOOL finished){


                     }];
}

为什么加载视图在 for 循环之后滑动？如果你尝试一下，在它打印 for 循环之前和之后执行两个动画。想法？

更新 2

- (void)stopLoading {
    [UIView animateWithDuration:1.0
                     animations:^{ 
                         loadingView.frame = CGRectMake(0,-40,320,40);
                     } 
                     completion:^(BOOL finished){
                     }];
}

- (void)startLoading {
    loadingView.frame = CGRectMake(0,-40,320,40);
    [loadingView setBackgroundColor:[UIColor blueColor]];
    [self.view addSubview:loadingView];
    //animate in within some method called when loading starts
    [UIView animateWithDuration:1.0
                     animations:^{ 
                         loadingView.frame = CGRectMake(0,0,320,40);
                     } 
                     completion:^(BOOL finished) {
                     }];
    sleep(5);
    [self stopLoading];
}

- (IBAction)displayLoadingScreen:(id)sender
{
    NSLog(@"button pressed");
    [self startLoading];
}

Answer 1

您可以在微调器的帮助下完成，否则您只需查看并设置动画及其坐标，当您单击任何对象时，它将在您的视图中弹出，并且在完成加载后您必须设置'-'坐标（框架）为您的弹出视图跳跃它会帮助您......

Answer 2

我要做的是在您的其他视图前面添加一个视图，并使用您想要的加载设计。

然后当加载完成时（使用通知或调用视图的函数），用那种动画向上滑动：

[UIView animateWithDuration:0.3
                              delay:0
                            options:UIViewAnimationOptionAllowUserInteraction
                         animations:^{
                             //change the frame to make the view go out of the screen
                         }
                         completion:^(BOOL finished){
                             //do whatever you want with the view (release it for instance)
                         }];

Answer 3

loadingView.frame = CGRectMake(0,-40,320,40);
[loadingView setBackgroundColor:[UIColor blueColor]];
[self.view addSubview:loadingView];
//animate in within some method called when loading starts
[UIView animateWithDuration:1.0
                 animations:^{ 
                     loadingView.frame = CGRectMake(0,0,320,40);
                 } 
                 completion:^(BOOL finished){


                 }];
//animate out within some method called when loading ends
[UIView animateWithDuration:1.0
                 animations:^{ 
                     loadingView.frame = CGRectMake(0,-40,320,40);
                 } 
                 completion:^(BOOL finished){


                 }];