webview和js的交互
https://github.com/marcuswestin/WebViewJavascriptBridge
用法摘抄如下:
用法摘抄如下:
引用See ExampleAppDelegate.* for example code. To use it in your own project:
1) Copy Classes/WebViewJavascriptBridge.h and Classes/WebViewJavascriptBridge.m into your Xcode project
2) Instantiate a UIWebView, a WebViewJavascriptBridge, and set yourself as the bridge's delegate
#import <UIKit/UIKit.h>
#import "WebViewJavascriptBridge.h"
@interface ExampleAppDelegate : UIResponder <UIApplicationDelegate, WebViewJavascriptBridgeDelegate>
@end
@implementation ExampleAppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOpti*****:(NSDictionary *)launchOpti*****
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
self.webView = [[UIWebView alloc] initWithFrame:self.window.bounds];
[self.window addSubview:webView];
self.javascriptBridge = [WebViewJavascriptBridge javascriptBridgeWithDelegate:self];
self.webView.delegate = javascriptBridge;
[self.window makeKeyAndVisible];
return YES;
}
- (void)javascriptBridge:(WebViewJavascriptBridge *)bridge receivedMessage:(NSString *)message fromWebView:(UIWebView *)webView
{
NSLog(@"MyJavascriptBridgeDelegate received message: %@", message);
}
@end
3) Go ahead and send some messages from Objc to javascript
[self.javascriptBridge sendMessage:@"Well hello there" toWebView:self.webView];
4) Finally, set up the javascript side of things
document.addEventListener('WebViewJavascriptBridgeReady', function onBridgeReady() {
WebViewJavascriptBridge.setMessageHandler(function(message) {
alert('Received message: ' + message)
})
WebViewJavascriptBridge.sendMessage('Hello from the javascript')
}, false)