Question

我有一个UIScrollView，其中嵌入了UIView。它从按钮单击底部向上滚动，按钮位于另一个视图中。当它向上滚动时，它部分覆盖了调用视图，即按钮所在的视图。现在，我有另一个按钮，可以推动这个滚动视图。此按钮似乎不起作用。我已经发布了整个代码。请帮助!!

-(IBAction)unscrollClicked:(id)sender
{
 //[viewController.view removeFromSuperview]; 
 [UIView beginAnimations:@"back to original size" context:nil];

 scrollView.contentSize=viewController.view.bounds.size;


 //scrollView.contentSize=viewController.view.bounds.size;
 [UIView commitAnimations];

}

-(IBAction)scrollClicked:(id)sender

{

 //viewController.view.backgroundColor=[UIColor orangeColor];
 viewController.view.frame=CGRectMake(0, 410, 320, 460);

 //[self.view addSubview:viewController.view];

 UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,40, 320, 400)];//(0,0,320,160)
 scrollView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;

 //[MyView setFrame:CGRectMake (0, 0, 320, 170)];
 viewController.view.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;
 scrollView.contentSize = viewController.view.bounds.size;


 scrollView.bounces = YES;
 scrollView.bouncesZoom = YES;
 scrollView.scrollEnabled = YES;
 scrollView.minimumZoomScale = 0.5;
 scrollView.maximumZoomScale = 5.0;
 scrollView.delegate = self;

 [scrollView addSubview: viewController.view];


 [self.view addSubview:scrollView];
 [self moveScrollView:scrollView];
}

-(void) moveScrollView:(UIScrollView *)scrollView

{

 CGFloat scrollamount=400;



 [scrollView setContentOffset:CGPointMake(0,scrollamount) animated:YES];
}

Answer 1

尝试使用zoomToRect方法。

Answer 2

我认为你应该修改你的移动方法。实际上，它显示的内容为固定原点（高度400），但在一次调用之后它不应该做任何事情，因为contentOffset已经是400.试试这个：

-(void) moveScrollView:(UIScrollView *)scrollView upwards:(BOOL)up {
     CGFloat scrollamount=400;

if ( up)
    [scrollView setContentOffset:CGPointMake(0,scrollamount) animated:YES];
else
    [scrollView setContentOffset:CGPointMake(0,0) animated:YES];
}

并像这样调用：

[self moveScrollView:scrollView upwards:YES]; // or NO for moving down

UIScrollView“恢复原始大小”

2 个答案: