UIScrollView“恢复原始大小”

时间:2010-09-03 11:44:36

标签: iphone objective-c iphone-sdk-3.0

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];
}

2 个答案:

答案 0 :(得分:0)

尝试使用zoomToRect方法。

答案 1 :(得分:0)

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