ios uiwebview 访问外部网页遇到点击一会就老弹出提示说"网络连接异常,请重试"

问题如下图

38D0100DFED535D4801A4C054DF0D9DC.jpg

解决方案
UIWebView 屏蔽 alert警告框
如果是网页内容里面的alert,我们可以等网页加载完毕,也就是在webViewDidFinishLoad中执行下面的js代码,就可以屏蔽alert了

myWebView stringByEvaluatingJavaScriptFromString:@"window.alert=null;"];

但上面的方法对于网页onLoad事件里面的alert就不起作用了
解决方法就是给UIWebView添加一个类别:
给工程添加JavaScriptAlert.h

@interface UIWebView (JavaScriptAlert) 
- (void)webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame;
- (BOOL)webView:(UIWebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame;
@end

给工程添加JavaScriptAlert.m文件

@implementation UIWebView (JavaScriptAlert)

- (void)webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame {
    /*
     UIAlertView* dialogue = [[UIAlertView alloc] initWithTitle:nil message:message delegate:nil cancelButtonTitle:@"好" otherButtonTitles:nil];
     [dialogue show];
     [dialogue autorelease];
     */
}
- (BOOL)webView:(UIWebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame{
   return NO;
}
@end

其实runJavaScriptAlertPanelWithMessage和runJavaScriptConfirmPanelWithMessage是WebUIDelegate的成员函数,详情可以查阅WebUIDelegate的帮助文档