自定义UIAlertView由UIWebView的javascript调用

Question

我有一个自定义alertvew，当在uiwebview调用中按下按钮时javascript：

function doSomething（event）{                 警报（“简单测试”）;                 返回false;             } 我希望那个“警报”打开我的自定义uialert。 可能吗？ 感谢

Answer 1

找到适合我的代码：

@interface UIWebView (JavaScriptAlert) 

- (void)webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame;

@end

@implementation UIWebView (JavaScriptAlert)

- (void)webView:(UIWebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame {
    UIAlertView* dialogue = [[UIAlertView alloc] initWithTitle:nil message:message delegate:nil cancelButtonTitle:@"Okay" otherButtonTitles:nil];

    UIImage *theImage = [UIImage imageNamed:@"MdC_Base_PopUp.png"];
    theImage = [theImage stretchableImageWithLeftCapWidth:16 topCapHeight:16];
    CGSize theSize = [dialogue frame].size;

    UIGraphicsBeginImageContext(theSize);
    [theImage drawInRect:CGRectMake(0, 0, dialogue.frame.size.width, dialogue.frame.size.height)];
    theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    dialogue.layer.contents = (id)[theImage CGImage];

    [dialogue show];
    [dialogue autorelease];
}

@end