通过单击UIWebView中的按钮调用方法 [英] Call a method by clicking a button in a UIWebView

问题描述

我想生成一些HTML内容，并将其放入UIWebView。 HTML包含一些按钮。是否可以定义这些按钮的操作？我想在有人在UIWebView中按下此按钮时调用我的目标代码中的一个方法（例如firstButtonPressed）。

感谢您帮助我。

解决方案

只要跟进这一点，就可以，而不是难以将HTML / javascript事件连接到objective-c方法。 p>

Damien Berrigaud提出了一个 $

$

<$ p

$ p> //以文件开头的地图链接：//
//以#action
结尾//使用控制器的操作（如果存在）。
//
//在Safari中打开其他链接。
- （BOOL）webView：（UIWebView *）webView shouldStartLoadWithRequest：（NSURLRequest *）request navigationType：（UIWebViewNavigationType）navigationType {
NSString * fragment，* scheme;

if（navigationType == UIWebViewNavigationTypeLinkClicked）{
[webView stopLoading];
fragment = [[request URL] fragment];
scheme = [[request URL] scheme];

if（[scheme isEqualToString：@file]&& [self responsesToSelector：NSSelectorFromString（fragment）]）{
[self performSelector：NSSelectorFromString（fragment）
return NO;
}

[[UIApplication sharedApplication] openURL：[request URL]];
}

return YES;
}


I want to generate some HTML content and put this into a UIWebView. The HTML contains some buttons. Is it possible to define actions for these buttons? I want to call a method (e.g. firstButtonPressed) in my objective-c code when someone presses this button in the UIWebView.

Thanks you for helping me.

解决方案

Just to follow up on this, it is possible, and not to difficult to connect HTML/javascript events to objective-c methods.

Damien Berrigaud came up with a good example of how to do that by using file:// links

// Map links starting with file://
//            ending with #action
// with the action of the controller if it exists.
//
// Open other links in Safari.
- (BOOL)webView: (UIWebView*)webView shouldStartLoadWithRequest: (NSURLRequest*)request navigationType: (UIWebViewNavigationType)navigationType {
  NSString *fragment, *scheme;

  if (navigationType == UIWebViewNavigationTypeLinkClicked) {
    [webView stopLoading];
    fragment = [[request URL] fragment];
    scheme = [[request URL] scheme];

    if ([scheme isEqualToString: @"file"] && [self respondsToSelector: NSSelectorFromString(fragment)]) {
      [self performSelector: NSSelectorFromString(fragment)];
      return NO;
    }

    [[UIApplication sharedApplication] openURL: [request URL]];
  }

  return YES;
}

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