iOS 加载html 修改HTML5的内容

1.利用webView控件加载本地html5或者网络上html5

2.设置控制器为webView的代理,遵守协议

3.实现代理方法webViewDidFinishLoad:

4.在代理方法中进行操作HTML5中的标签(CRUD→增删改查)

1.用类选择器或者id选择器或者标签选择器等选择要进行操作的标签

2.把选择好的标签转换成字符串

3.webView调用stringByEvaluatingJavaScriptFromString方法

1.加载本地HTML5

NSURL *url = [[NSBundle mainBundle] URLForResource:@"test" withExtension:@"html"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

[self.webView loadRequest:request];

2.加载网络上网页HTML5

NSURL *url = [NSURL URLWithString:@"http://www.baidu.com"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

[self.webView loadRequest:request];

3.在oc中删除HTML5中的某个标签,比如按钮

// 网页视图加载完毕会调用代理的这个方法

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

NSString *str = @"document.getElementsByClassName('detail_btns2')[0].remove();";

[webView stringByEvaluatingJavaScriptFromString:str];

}

4.在oc中更改HTML5内容

- (void)webViewDidFinishLoad:(UIWebView *)webView

{

NSString *headerStr = @"document.getElementsByTagName('h1')[0].innerText = '测试文字';";

[webView stringByEvaluatingJavaScriptFromString:headerStr];

NSString *downLoadStr = @"document.getElementById('xiazaiapp').getElementsByTagName('a')[0].innerText = '下个鸡蛋';";

[webView stringByEvaluatingJavaScriptFromString:downLoadStr];

}