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前述:JavaScriptCore你不知道的OC与JS之间交互。OC与JS之间用model实现交互、通讯、传值!好玩!
几乎三年来一直断断续续接触OC与JS交互,每次觉得UIWebView OC与JS的交互已经很熟练了,但是每次研究它都会有新的收获。也越来越感觉JS和OC交互原来这么顺滑,越来越无感!完全可以像OC一样使用OC的对象,属性,方法!真心是太方便了!
其实之前我也总结过OC与JS交互无非三种情况:WebViewJavascriptBridge、JavaScriptCore、拦截URL。
有人问我?“我想给jsmodel中 让h5返回一堆参数可以不?”
根据这个问题?我就动手实践了一下!这里使用的JavaScriptCore的JSExport 实现的!
实践代码:https://github.com/muyushifang07/jsCallOCModel
第一部分:
//
// ELLiveJSModel.h
// JavaScriptCoreDemo
//
// Created by giifidev on 2018/8/21.
// Copyright © 2018年 reborn. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <JavaScriptCore/JSExport.h>
@class ELLiveJSModel;
@protocol MyPointExports <JSExport>
@property (nonatomic,assign) double x;
@property (nonatomic,assign) double y;
- (NSString *)description;
- (ELLiveJSModel *)makePointX:(double)x PointY:(double)y;
@end
@interface ELLiveJSModel : NSObject<MyPointExports>
@property (nonatomic,assign) double x;
@property (nonatomic,assign) double y;
- (NSString *)description;
- (ELLiveJSModel *)makePointX:(double)x PointY:(double)y;
@end
//
// ELLiveJSModel.m
// JavaScriptCoreDemo
//
// Created by giifidev on 2018/8/21.
// Copyright © 2018年 reborn. All rights reserved.
//
#import "ELLiveJSModel.h"
@implementation ELLiveJSModel
- (NSString *)description {
// self.x = 7;
// self.y = 9;
// 这里可以看到前端赋的值20,前端直接可以操作OC 的model以及属性
NSLog(@"打印model的X的值-----:%f",self.x);
return @"description";
}
- (ELLiveJSModel *)makePointX:(double)x PointY:(double)y {
ELLiveJSModel *model = [[ELLiveJSModel alloc]init];
model.x = x;
model.y = y;
NSLog(@"返回一个新的model.x:%f model.y:%f",model.x,model.y);
return model;
}
@end
第二部分:
//
// JSModelViewController.m
// JavaScriptCoreDemo
//
// Created by giifidev on 2018/8/21.
// Copyright © 2018年 reborn. All rights reserved.
//
#import "JSModelViewController.h"
#import "ELLiveJSModel.h"
#define kScreenWidth [UIScreen mainScreen].bounds.size.width
#define kScreenHeight [UIScreen mainScreen].bounds.size.height
@interface JSModelViewController ()<UIWebViewDelegate>
@property(nonatomic, strong) UIWebView *webView;
@property(nonatomic, strong) JSContext *context;
@end
@implementation JSModelViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
self.title = @"indexModel";
self.view.backgroundColor = [UIColor whiteColor];
self.webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight)];
[self.view addSubview:self.webView];
NSString *path = [[NSBundle mainBundle] pathForResource:@"indexModel" ofType:@"html"];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]];
self.webView.delegate = self;
[self.webView loadRequest:request];
}
#pragma mark - UIWebViewDelegate
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
// 获取html title设置导航栏 title
self.title = [webView stringByEvaluatingJavaScriptFromString:@"document.title"];
self.context = [webView valueForKeyPath:@"documentView.webView.mainFrame.javaScriptContext"];
// 捕捉异常回调
self.context.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {
context.exception = exceptionValue;
NSLog(@"异常信息: %@",exceptionValue);
};
// model 的方法JS与OC交互
ELLiveJSModel *jsModel = [ELLiveJSModel new];
self.context[@"testobject"] = jsModel;
// 注意:jsModel 是在OC的对象名字,testobject 是在JS中的对象名字
// 模拟JS调用方法
NSString *jsCallOCModelFunction = @"testobject.description()";
JSValue *valu = [self.context evaluateScript:jsCallOCModelFunction];
NSLog(@"vali----:%@",[valu toString]); // 返回值
NSLog(@"尚未赋值X的log:%f",jsModel.x);
// 模拟JS调用方法 给testobject.x赋值
NSString *jsCallOCModelFunction1 = @"testobject.x=30";
[self.context evaluateScript:jsCallOCModelFunction1];
NSLog(@"jsCallOCFunction1----%f",jsModel.x);
// JS双参数调用的例子
NSString *jsCallOCModelFunction2 = @"testobject.makePointXPointY('20','50')";
[self.context evaluateScript:jsCallOCModelFunction2];
NSLog(@"jsCallOCFunction2----%f",jsModel.x);
}
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error
{
NSLog(@"error == %@",error);
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
测试入口
JS修改OC的model 的属性的值按钮
控制台log 可以得出 实践结果:
JS 中 可以拿到OC 的对象,并且可以操作OC 的model 的属性,也可以调用model的方法!并且JS 和 OC 操作的是同一个model 对象! 欧了!
喜欢的童鞋可以拿去研究吧!其乐无穷!