UIWebView 兑现翻页功能 _Web前端

UIWebView 实现翻页功能

UIWebView倒是经常用，不过翻页功能没用过，因为还没写过电子书之类的应用，最近心血来潮写了个电子书的框架，这样就可以量产电子书应用了，哈哈。可是要实现翻页功能时发现UIwebView竟然接收不了touch事件，老郁闷了。网上有大牛的hack方法，不过审核貌似通不过。组后发现苹果官方给我们提供了专门的api，通过 UISwipeGestureRecognizer 来实现。

直接上代码吧：

UISwipeGestureRecognizer  *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(previousPage)];
   swipeRight.direction=UISwipeGestureRecognizerDirectionRight;
   [webView addGestureRecognizer:swipeRight];
   [swipeRight release];
   
   UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(nextPage)];
   swipeLeft.direction = UISwipeGestureRecognizerDirectionLeft;
   [webView addGestureRecognizer:swipeLeft];
   [swipeLeft release];

一看代码应该就明白了。苹果官方给我们的手势有4个，分别对应上下左右：

typedef enum {
    UISwipeGestureRecognizerDirectionRight = 1 << 0,
    UISwipeGestureRecognizerDirectionLeft  = 1 << 1,
    UISwipeGestureRecognizerDirectionUp    = 1 << 2,
    UISwipeGestureRecognizerDirectionDown  = 1 << 3
} UISwipeGestureRecognizerDirection;