iOS开发中OC与JS的交互

 
 
import "ViewController.h"
 
 
import 
 
 
@interface ViewController ()
 @property(nonatomic,strong) JSContext *jsContext;
 @property(nonatomic,strong)UIWebView *web;
 @end
 
 
@implementation ViewController
 
 
-(void)viewDidLoad {
 
 
[super viewDidLoad];
 //设置代理
 
 
self.web.delegate = self;
 
 
[self checkWebCart];
 
 
}
 
 
-(void)loadWebView:(NSString *)strUrl
 {
 
 
if (strUrl) {
 
 
NSURL *weburl = [NSURL URLWithString:@"url"];
 
 
NSURLRequest *request =[NSURLRequest requestWithURL:weburl];
 
 
[self.web loadRequest:request];
 
 
}
 
 
}
 
 
-(void)webViewDidFinishLoad:(UIWebView *)webView
 {
 
 
//创建JSContext 对象（此处通过当前webView的键获取到jscontext）

self.jsContext = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];


//js调用iOS
//js的方法名称，赋给是一个block 里面是iOS代码,方法名(networkSetFinished)h5人员提供
//没参数就为空,可以获取到JS传过来的值
self.jsContext[@"networkSetFinished"] = ^(int state,NSString * msg) {
    
    // 主线程执行：
    dispatch_async(dispatch_get_main_queue(), ^{
        
    });
    
};

//点击web页面按钮的响应
self.jsContext[@"NotifyCart"] = ^(NSString * state) {
    
    NSLog(@"main:%d",[state intValue]);
    
    [[NSNotificationCenter defaultCenter] postNotificationName:@"NotifyCart" 
 
 
object:[NSString stringWithFormat:@"%d", [state intValue]]];
 
 
};
 
 
}
 
 
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:
 
 
(UIWebViewNavigationType)navigationType{
 
 
//判断是否单击，页面的点击进行拦截，返回NO即拦截
if (navigationType == UIWebViewNavigationTypeLinkClicked){
//判断点击响应的URL路径是否包含该方法名
    if ([[request.URL path] containsString:@"/ChouJiang/"]){
    //进行局部点击跳转
        return NO;
    }
    
    
    //在这里可以获取对应的URL 进行页面跳转加载   request.URL 如
    UIViewController *vc = [[UIViewController alloc]init];
    [self.navigationController pushViewController:vc animated:YES];
    return NO;
    
}

return YES;
 
 
}
 
 
//传值给web
 
 
-(void)checkWebCart
 {
 
 
NSString * checkWebCart =[NSString stringWithFormat:@"appJumpToCar()"]; //准备执行的js代码

self.jsContext.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {
    context.exception = exceptionValue;
    NSLog(@"异常信息：%@", exceptionValue);
};
//传值一般利用到了 stringByEvaluatingJavaScriptFromString
[self.web stringByEvaluatingJavaScriptFromString:checkWebCart];
 
 
}
 
 
@end