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WKWebView的使用心得

2015-04-03 16:49 288 查看

#import <UIKit/UIKit.h>
#import <WebKit/WebKit.h>

@interface ViewController : UIViewController<WKNavigationDelegate,WKScriptMessageHandler,WKUIDelegate>

@end

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) WKWebView *webView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    WKWebViewConfiguration *configuration = [[WKWebViewConfiguration alloc] init];
    WKUserContentController *controller = [[WKUserContentController alloc] init];
    
    [controller addScriptMessageHandler:self name:@"observe"];
    configuration.userContentController = controller;
    
    NSURL *jsUrl = [NSURL URLWithString:@"file:///Users/zhengzeqiang/Desktop/test.html"];
    
    _webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:configuration];
    
    //打开左划回退功能
    _webView.allowsBackForwardNavigationGestures =YES;
    
    _webView.navigationDelegate = self;
    
    _webView.UIDelegate = self;
    
    [_webView loadRequest:[NSURLRequest requestWithURL:jsUrl]];
    
    [self.view addSubview:_webView];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - WKScriptMessageHandler

- (void)userContentController:(WKUserContentController *)userContentController
      didReceiveScriptMessage:(WKScriptMessage *)message {
    // Check to make sure the name is correct
    if ([message.name isEqualToString:@"observe"]) {
        // Log out the message received
        NSLog(@"Received event %@", message.body);
        
        NSString *sendCode = @"goToHtml();";
        [_webView evaluateJavaScript:sendCode completionHandler:nil];
    }
}

#pragma mark - WKNavigationDelegate
//根据webView、navigationAction相关信息决定这次跳转是否可以继续进行,这些信息包含HTTP发送请求，如头部包含User-Agent,Accept
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
    
    decisionHandler(WKNavigationActionPolicyAllow);
    
        NSLog(@"%@", navigationAction.request.URL);
    
    switch (navigationAction.navigationType) {
        case WKNavigationTypeBackForward: {
            
            NSLog(@"WKNavigationTypeBackForward");
        }
            break;
        case WKNavigationTypeFormResubmitted: {
            
            NSLog(@"WKNavigationTypeFormResubmitted");
        }
            break;
        case WKNavigationTypeFormSubmitted: {
            
            NSLog(@"WKNavigationTypeFormSubmitted");
        }
            break;
        case WKNavigationTypeLinkActivated: {
            
            NSLog(@"WKNavigationTypeLinkActivated");
        }
            break;
        case WKNavigationTypeOther: {
            
            NSLog(@"WKNavigationTypeOther");
        }
            break;
        case WKNavigationTypeReload: {
            
            NSLog(@"WKNavigationTypeReload");
        }
            break;
            
        default:
            break;
    }
    
}

@end

</pre><pre name="code" class="objc">.html

<pre name="code" class="html"><html>
<head>
    <meta charset="UTF-8">
    <style>
        body{text-align:center}
        .buttonClass {
 			height: 100px;
 			width: 500px;
 			font-size:50px;
 		}
    </style>
</head>
<body>
	<font size = >
<br>
<br>
<br>
<br>
<input type="button" value="发送命令" class="buttonClass" style="height=20px;width=100px;" onclick="postMyMessage()"/>
<br>
<script language="javascript" type="text/javascript">

function postMyMessage()  { 
    var message = { 'message' : 'Hello, World!', 'numbers' : [ 1, 2, 3 ] }; 
    window.webkit.messageHandlers.observe.postMessage(message); 
}
function goToHtml(){
<span style="white-space:pre">	</span>//do something!
}
</script>
</body>
</html>

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