UIScrollView 视图反弹并且不会停留在底部

Question

我有这样一组:

UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 1000.0)];
scroll.backgroundColor = [UIColor clearColor];
scroll.contentSize = CGSizeMake(320.0, 1000.0);
[self.view addSubview:scroll];
UIView *pView = [[UIView alloc] initWithFrame:CGRectMake(10.0, 100.0, 300.0, 400.0)];
pView.backgroundColor = [UIColor whiteColor];
pView.layer.cornerRadius = 2.0;
pView.layer.borderColor = [UIColor blueColor].CGColor;
pView.layer.borderWidth = 1.0f;
[scroll addSubview:pView];
UIView *aView = [[UIView alloc] initWithFrame:CGRectMake(10.0, 500.0, 300.0, 20.0)];
aView.backgroundColor = [UIColor redColor];
[scroll addSubview:aView];

但每次我向下滚动视图时，屏幕都会弹回顶部。为什么?

Answer 1

不要将scrollview的高度设置为大于屏幕尺寸——滚动的不是scrollview本身，而是scrollview中的内容。

Answer 2

你的滚动视图高度有问题，请检查你的UIScrollView高度，它会大于你的屏幕尺寸

UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, viewHeight)];