iOS_UIWebview

UIWebview的Subviews

UIWebview有且只有一个subView，它就是UIScrollerView。

UIWebview的ScrollerView有11个subViews。以下是打印出来的Log：

(gdb) po [scroller subviews]
<__NSArrayM 0x68238a0>(
<UIImageView: 0x685be20; frame = (0 0; 54 54); transform = [-1, 0, -0, -1, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685be60>>,
<UIImageView: 0x685bdb0; frame = (0 0; 54 54); transform = [0, 1, -1, 0, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685bdf0>>,
<UIImageView: 0x685bd40; frame = (0 0; 54 54); transform = [0, -1, 1, 0, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685bd80>>,
<UIImageView: 0x685bbc0; frame = (0 0; 54 54); alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685bd10>>,
<UIImageView: 0x685bb50; frame = (-14.5 14.5; 30 1); transform = [0, 1, -1, 0, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685bb90>>,
<UIImageView: 0x685bae0; frame = (-14.5 14.5; 30 1); transform = [0, -1, 1, 0, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685bb20>>,
<UIImageView: 0x685baa0; frame = (0 0; 1 30); transform = [-1, 0, -0, -1, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685b2c0>>,
<UIImageView: 0x685ba60; frame = (0 0; 1 30); alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685afc0>>,
<UIImageView: 0x685b910; frame = (0 974; 768 30); alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x685ac60>>,
<UIImageView: 0x685b8d0; frame = (0 0; 768 30); transform = [-1, 0, -0, -1, 0, 0]; alpha = 0; opaque = NO; userInteractionEnabled = NO; layer = <CALayer: 0x6859010>>,
<UIWebBrowserView: 0x7078600; frame = (0 0; 768 1004); layer = <UIWebLayer: 0x6852720>>
)

10个UIImageView和一个UIWebBrowserView。我的理解是，上下各5个UIImageView用来显示阴影效果，剩下来的UIWebBrowserView用来显示内容。

隐藏拖拽UIWebview时上下的两个有阴影效果

要去掉阴影效果，就要在这10个UIImageView上作文章，具体代码如下：

    UIScrollView  *scroller = [webView.subviews objectAtIndex:0];
    if (scroller) {
        for (UIView *v in [scroller subviews]) {
            if ([v isKindOfClass:[UIImageView class]]) {
                v.hidden = YES;
            }
        }
    }

禁用UIWebView拖拽时的反弹效果

[(UIScrollView *)[[webView subviews] objectAtIndex:0] setBounces:NO];