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如果用一句话来描述JSPatch,就是利用系统自带的JavaScriptCore.framework配合RunTime机制,进行实时的代码下载与运行..
而且使用也很简单,启动,加载JS,运行...
[JPEngine startEngine]; NSString *sourcePath = [[NSBundle mainBundle] pathForResource:@"demo" ofType:@"js"]; NSString *script = [NSString stringWithContentsOfFile:sourcePath encoding:NSUTF8StringEncoding error:nil]; [JPEngine evaluateScript:script]; self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds]; [self.window addSubview:[self genView]]; [self.window makeKeyAndVisible];
关键是装载进JSPatch的js怎么写.
require(‘UIAlertView‘) //需要引入的类 defineClass(‘LifeViewController‘, { //作用于那个类 viewWillAppear: function(animated) { //重写那个函数 self.super().viewWillAppear(animated); var alert = UIAlertView.alloc().initWithTitle_message_delegate_cancelButtonTitle_otherButtonTitles("Hot - Fix Test", "热更新测试Hot-Fix Test", self, "取消", "确定", null); alert.setTag(1); alert.show(); }, });
不过也提供了将oc代码直接转成js的工具.
http://bang590.github.io/JSPatchConvertor/
其实JSPatch的想象空间很大. 如果运动得当,灵活性将不输于H5,但体验绝对秒杀H5.虽然一般拿来修复Bug...
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原文地址:http://www.cnblogs.com/ngi8/p/5625207.html