iphone打开文本视图中的超连接显示在网页视图中。opening links in a UITextView in a web view

当设定了文本内容的链接高亮事件监听后，UIApplication将对点击事件做出responser，比如调用safari处理http文本，如果要改变这种响应方法。怎么做？

Method1、

使用类别override UITextView的webView:decidePolicyForNavigationAction:request:frame:decisionListener:方法。

@interface UITextView (CommonOverrid)
@end

@class WebView, WebFrame;
@protocol WebPolicyDecisionListener;

@implementation UITextView (CommonOverrid)

- (void)webView:(WebView *)webView decidePolicyForNavigationAction:(NSDictionary *)actionInformation request:(NSURLRequest *)request frame:(WebFrame *)frame decisionListener:(id < WebPolicyDecisionListener >)listener
{
    NSLog(@"request: %@", request);
    UIWebView *v1 = [[UIWebView alloc] initWithFrame:CGRectMake(0, self.superview.frame.size.height - 200, 764, 200)];
        [v1 loadRequest:request];
    [((UIView *)(self.superview)) addSubview:v1];
}

UITextView增加了类别，重写了方法。但必须注意这是一个private API。如果内部框架调整可能导致实效。

Method2、

重写UIApplication openURL方法

@implementation UIApplication (Private)

- (BOOL)openURL:(NSURL*)url
{
  //current delegate
  MyAppDelegate *watcher = [[UIApplication sharedApplication] delegate];
  //current controller,use it to handleURL the action
  if (watcher.currentViewController) {
   //do something here....
    [watcher.currentViewController handleURL:url];
    return YES;
    }
  return NO;
}

@end

还有个实现不通过重写方法，而是先命名别称然后交换方法实现。swap implementations between separate methods.

Method customOpenUrl = class_getInstanceMethod([UIApplication class], @selector(customOpenURL:));
Method openUrl = class_getInstanceMethod([UIApplication class], @selector(openURL:));
method_exchangeImplementations(customOpenUrl, openUrl);

所以总结下来还是推荐使用第二种方法。

详见地址：https://github.com/marksands/UITextViewLinkOptions