UIWebView

self.webView = [[UIWebView alloc]initWithFrame:self.view.bounds];

    self.webView.autoresizingMask = UIViewAutoresizingFlexibleHeight;

    [self.view addSubview:self.webView];

    self.webView.userInteractionEnabled = YES;

    self.webView.delegate = self;

    self.webView.scalesPageToFit =  YES;webView大小適配屏幕

NSURL *url = [NSURL URLWithString:_requstUrl];

    NSURLRequest *request = [NSURLRequest requestWithURL:url];

NSURLRequest *request = [NSURLRequest requestWithURL:url cachePolicy: NSURLRequestReloadIgnoringCacheData timeoutInterval:10];

能夠本身進行網絡請求 也可中止 是異步的

[self.webView loadRequest:request];