WKWebView & UIWebView

1.内存消耗

屏幕快照 2016-12-02 上午10.09.41副本 2.png

2.获取URL、scheme、resourceSpecifier

- (BOOL)webView:(UIWebView *)webView 
shouldStartLoadWithRequest:(NSURLRequest *)request 
navigationType:(UIWebViewNavigationType)navigationType {

  NSURL *url = request.URL;
  
  if ([[IPLLoginManager sharedInstance] isScheme:url.scheme])
    {
        [IPLLoginManager sharedInstance].resourceSpecifier = 
        url.resourceSpecifier;

        [[IPLLoginManager sharedInstance] getLoadString];
        
        [[IPLLoginManager sharedInstance] getToken];
        
        return NO;
    }
    return YES;
}

- (void)webView:(WKWebView *)webView 
decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction 
decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    
    NSURL *url = navigationAction.request.URL;
    
    if ([[IPLLoginManager sharedInstance] isScheme:url.scheme])
    {
        [IPLLoginManager sharedInstance].resourceSpecifier = 
        url.resourceSpecifier;

        [[IPLLoginManager sharedInstance] getLoadString];
        
        [[IPLLoginManager sharedInstance] getToken];
        
        decisionHandler(WKNavigationActionPolicyCancel);
    }
    else
    {
        decisionHandler(WKNavigationActionPolicyAllow);

    }

}

3.获取标题

- (void)webViewDidFinishLoad:(UIWebView *)webView{

    self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];

}

- (void)webView:(WKWebView *)webView 
didFinishNavigation:(WKNavigation *)navigation{

     NSLog(@"%@",self.mainWebView.title);

}

4.获取ua，通过ua区别PC端还是移动端请求服务器。

NSString *userAgent = [webView 
stringByEvaluatingJavaScriptFromString:@"navigator.userAgent"];

NSLog(@"old agent :%@", userAgent);

 [self.mainWebView evaluateJavaScript:@"navigator.userAgent" 
completionHandler:^(id result, NSError *error) {
     
     NSLog(@"%@",result);
     
 }];

实际上，只要把自定义的字符串加入ua里面即可～
注：需在请求前设置

    NSString *userAgent = @"Mozilla/5.0 (iPhone; CPU iPhone OS 9_1 like Mac OS X) AppleWebKit/602.1.46 (KHTML, like Gecko) Mobile/13A137";
    
    NSString *executableFile = @"xxxxx";
    
    NSString *version = [[[NSBundle mainBundle] infoDictionary]
                         objectForKey:(NSString *)kCFBundleVersionKey];
    
    NSString *ua = [NSString stringWithFormat:@"%@ %@ %@",
                    executableFile,
                    version,userAgent];
    
    [[NSUserDefaults standardUserDefaults]
     registerDefaults:@{@"UserAgent" : ua, @"User-Agent" : ua}];
    
    [[NSUserDefaults standardUserDefaults]  synchronize];

5.清除页面缓存cookie

NSHTTPCookie *cookie;

NSHTTPCookieStorage *storage = [NSHTTPCookieStorage sharedHTTPCookieStorage];

for (cookie in [storage cookies])

{

[storage deleteCookie:cookie];

}

6.添加返回按钮

1.8 返回添加关闭按钮

当点击进入两次以上网页，想直接返回app，那么就需要一个关闭按钮

- (void)leftBarButtonClick:(id)sender
{
    if (self.mainwebView.canGoBack)
    {
        [self.mainwebView goBack];
        [self showWebCloseButton];
    }
    else
    {
        [self popViewController];
    }
}