<pre><code>
import "ViewController.h"
import <JavaScriptCore/JavaScriptCore.h>
@interface ViewController ()<UIWebViewDelegate>
@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
