OC原生代码／webview与js／网页交互的最好方式

利用OC提供的<JavaScriptCore/JavaScriptCore.h>去实现js与oc的交互

第一步继承代理 @interface WebViewViewController ()< UIWebViewDelegate>

第二步 self. webCtrl.delegate = self; //设置代理

第三步 在实现的协议方法里写上定义js对象的方法

-( void)webViewDidFinishLoad:(UIWebView *)webView

{

JSContext *context = [self.webCtrl valueForKeyPath: @"documentView.webView.mainFrame.javaScriptContext"];

//定义好JS要调用的方法

IOSBridge = [[GLBL_APP alloc] init];

context[ @"IOSBridge"] = IOSBridge;

}

第四步 定义和实现js相应的类和实现相应功能代码

#import <Foundation/Foundation.h>

#import <JavaScriptCore/JavaScriptCore.h>

@protocol PublicProtocol<JSExport>

//允许网页app访问的对象属性／方法

-( void)login;

-( void)shareSong:(NSString*)songId :(NSString*)callback;

@end

@interface GLBL_APP : NSObject< PublicProtocol>

@property(nonatomic,strong)NSString *callbackName;

@end

#import "GLBL_APP.h"

@interface GLBL_APP()

{

}

@end

@implementation GLBL_APP

//去登录

-( void)login{

dispatch_async(dispatch_get_main_queue(), ^{ //始终在主进程中进行

if(![KeychainManager islogin]){

[KeychainManager gotoLogin];

}

});

}

//分享

-( void)shareSong:(NSString*)songId :(NSString*)callback{

if(![KeychainManager islogin]){

[KeychainManager gotoLogin];

return;

}

//分享

ShareView *shareView = [[ShareView alloc]initWithFrame:CGRectZero];

//赋值歌曲信息

[UserServices

getSongInfoWithSongId:songId userId:[KeychainManager readUserId] completionBlock:^(int result, id responseObject) {

NSDictionary *data=responseObject[@"data"];

shareView.songData = data;

}];

// SongModel *playingMusic = [MusicPlayTools shareMusicPlay].model;

// dfShareView.songData = [playingMusic dictionaryRepresentation];

[shareView showView];

if(callback){

self.callbackName = callback;

}

}

@end

第五步在js中调用

if(IOSBridge){

IOSBridge.shareSong(1207,'test');

}

第六步 在oc里执行JS

NSString *textJS = [NSString stringWithFormat: @"%@()",actionName];

[context evaluateScript:textJS];

}