设置UIScrollView只可以水平或者竖直滚动

UIScrollView里边包含多个UIWebView:

可以通过设置contentSize的值,设置其width为UIScrollerView可视区域的宽度:即UIScrollView的width,在设置一些alwaysBounceHorizontal之类的属性,那么就只能竖直方向滚动;

 

我需要设置UIScrollView只能横向滚动,UIWebView响应竖直滚动:

UIScrollView *contentView = [[[UIScrollView alloc] initWithFrame:frame] autorelease];
contentView.scrollEnabled = YES;
contentView.pagingEnabled = YES;
contentView.showsHorizontalScrollIndicator = NO;
contentView.showsVerticalScrollIndicator = NO;
contentView.alwaysBounceVertical = NO;
contentView.alwaysBounceHorizontal = NO;
[contentView setBackgroundColor:[UIColor redColor]];
[contentView setBounces:NO];

  再在加载UIWebView的地方设置每个WebView的frame和UIScrollView的contentSize;

[self.tabBarView.contentView setContentSize:CGSizeMake(self.tabBarView.frame.size.width * i, self.tabBarView.frame.size.height - kTabBarHeight)];

  这里我是在BCTabBarController基础上修改的,所以

self.tabBarView.frame.size.width相当于屏幕宽度,i为UIScrollView包含的UIWebView数量,
self.tabBarView.frame.size.height - kTabBarHeight为UIScrollView的固定高度并且等于UIWebView的高度,这样就能让UIScrollView不响应竖直方向滚动,让UIWebView响应竖直滚动。

bingo!