UIScrollView具有活动和非活动区域

时间:2012-10-22 19:59:43

标签: ios uiview uiscrollview scroll

我有一个UIScrollView占据了我的整个屏幕,一边是垂直工具栏,我需要约束滚动行为,这样用户只能通过拖动工具栏进行滚动。如果他们试图从屏幕上的任何其他位置拖动,则不应进行滚动。

我已尝试覆盖touchesBegantouchesShouldCancelInContentViewtouchesShouldBegin,以便如果触摸不是来自工具栏,我会调用setScrollEnabled:NO,如果是的话调用setScrollEnabled:YES,但似乎一旦滚动被禁用,方法就不再触发,我就陷入僵局。还尝试将工具栏设置为按钮并启用touchDown上的滚动并停用touchUpInsidetouchUpOutside。这也行不通。有人有什么想法吗?

1 个答案:

答案 0 :(得分:0)

使用第二个scrollview控制主滚动视图。我添加了一个渐变,以便能够看到滚动。

#import <QuartzCore/QuartzCore.h>

@implementation ScrollViewController {
    UIScrollView *mainScrollView;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    CGRect mainScrollViewRect = CGRectMake(0, 0, self.view.bounds.size.width - 100, self.view.bounds.size.height);
    mainScrollView = [[UIScrollView alloc] initWithFrame:mainScrollViewRect];
    mainScrollView.scrollEnabled = NO;
    mainScrollView.contentSize = CGSizeMake(self.view.bounds.size.width - 100, 1000);
    [self.view addSubview:mainScrollView];

    CAGradientLayer* gradientLayer = [CAGradientLayer layer];
    gradientLayer.startPoint = CGPointMake(0, 0);
    gradientLayer.endPoint = CGPointMake(1, 1);
    gradientLayer.frame = CGRectMake(0, 0, mainScrollView.contentSize.width, mainScrollView.contentSize.height);
    gradientLayer.colors = @[(id)[[UIColor blackColor] CGColor], (id)[[UIColor whiteColor] CGColor]];
    [mainScrollView.layer insertSublayer:gradientLayer atIndex:0];

    CGRect toolbarRect = CGRectMake(self.view.bounds.size.width - 100, 0, 100, self.view.bounds.size.height);
    UIScrollView *toolbarScrollView = [[UIScrollView alloc] initWithFrame:toolbarRect];
    toolbarScrollView.delegate = self;
    toolbarScrollView.contentSize = CGSizeMake(0, 1000);
    toolbarScrollView.backgroundColor = [UIColor yellowColor];
    [self.view addSubview:toolbarScrollView];
}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    mainScrollView.contentOffset = scrollView.contentOffset;
}

@end