前言 : h5和iOS原生互動,互相傳值,下面程式碼是完整的.M檔案  簡單實現h5和原生互動,互相傳值。

//
//  ViewController.m
//  原生-H5簡單互動
//
//  Created by Mr Yang on 2018/7/23.
//  Copyright © 2018年 MrYang. All rights reserved.
//
#define ScreemW   [UIScreen mainScreen].bounds.size.width
#define ScreemH   [UIScreen mainScreen].bounds.size.height
#import "ViewController.h"

//引用系統JS庫名
#import <JavaScriptCore/JavaScriptCore.h>
//原生建立JS代理方法 用於H5調此方法向原生傳值
@protocol JSDelegate <JSExport>
- (void)getImage:(id)parameter;
@end

@interface ViewController ()<UIWebViewDelegate,JSDelegate>

@property(retain, nonatomic) UIWebView *myWebView;
@property(strong, nonatomic) JSContext *jsContext;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self setupWebView];
}
- (void)setupWebView{
    if (!self.myWebView) {
        //初始化 WebView
        self.myWebView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, ScreemW, ScreemH)];
        self.myWebView.backgroundColor = [UIColor whiteColor];
        self.myWebView.delegate = self;
        NSURL *path = path = [NSURL URLWithString:@"www.baidu.com"];
        [self.myWebView loadRequest:[NSURLRequest requestWithURL:path]];
        [self.view addSubview:self.myWebView];
    }
}
#pragma mark UIWebViewDelegate
// 載入完成開始監聽js的方法

#pragma mark - JSDelegate
- (void)getImage:(id)parameter{
    
    
    dispatch_async(dispatch_get_main_queue(), ^{
        
        // parameter 就是H5給你傳的值
        
        JSValue *jsValue = self.jsContext[@"setImageWithPath"];
        
        //調取H5 JS 方法向H5傳值
        
        [jsValue callWithArguments:@[@{@"can1":@"",@"can2":@""}]];
    });
    
}

@end