UIScrollViewDelegate scrollViewWillEndDragging:withVelocity:targetContentOffset使用pagingEnabled = YES调用

Question

根据Apples文档(以及许多其他地方),如果UIScrollView.pagingEnabled设置为YES,则不会调用UIScrollViewDelegate:scrollViewWillEndDragging:withVelocity:targetContentOffset.在iOS6上,这似乎是真的,但是,在iOS7上,无论设置什么是pagingEnabled,它总是被我调用.

这是一个简单的测试视图控制器:

@interface ViewController ()
<UIScrollViewDelegate>
@property (weak, nonatomic) IBOutlet UIWebView *webView;
@end

@implementation ViewController

- (void)scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:(CGPoint)velocity targetContentOffset:(inout CGPoint *)targetContentOffset
{
    NSLog(@"%d", scrollView.pagingEnabled);
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    [self loadHTML];
    [self configureWebView];
}

- (void)loadHTML
{
    NSString* htmlPath = [[NSBundle mainBundle] pathForResource:@"htmlContent" ofType:@"html"];
    NSString* htmlString = [NSString stringWithContentsOfFile:htmlPath encoding:NSUTF8StringEncoding error:nil];
    [_webView loadHTMLString:htmlString baseURL:nil];
}

- (void)configureWebView
{
    [_webView.scrollView setDelegate:self];
    _webView.scrollView.pagingEnabled = YES;
}

@end

在iOS7中,如果pagingEnabled == YES,则scrollViewWillEndDragging中的NSLog打印1,如果设置为NO,则打印0.

在iOS6中,当pagingEnabled == YES时,控制台输出为:

Stop offset can not be modified for paging scroll views

如果为NO,则输出为0.

还有其他人得到这个吗？有谁知道在iOS7中这应该是这样吗？文档没有改变,所以我假设没有,但我想在向Apple提交错误报告之前我会问你们所有人,并在我的所有委托调用中添加了对pagingEnabled的检查.