JSPatch
- JSPatch的Github主页：https://github.com/bang590/JSPatch
- JSPatch的转换工具：https://github.com/bang590/JSPatchConvertor
- JSPatch官网：http://www.jspatch.com/
关于JSPatch的一些思考
JSPatch的原理就不在写了（不想互相copy...），网上文章太多，建议各位可以有选择性的阅读，其实最好的学习JSPatch就是我上面提供的三个链接，专业、实时、官方可信赖。
在使用的时候需要考虑的5个问题：
- 云端存储策略
- 版本控制（多版本并存）
- 覆盖范围
- 本地缓存策略
- 本地加载方式
ZXJSPatchHelper说明
从没想过写这个玩意，感觉（JSPatch官方已经做得很完整，很专业，很商业化了）纯粹想不明白JSPatch为什么要进行象征性的收费，因为JSPatch源码是基于MIT（建议百度下），而以上业务的设计并没有开源出来，所以就自己写了一个小工具。ZXJSPatchHelper目前只针对第5个问题进行了处理（上午过来上班才开始写的...后续会更新），前3个问题需要服务端进行配合，稍后写一个PHP版本的demo。
如何使用ZXJSPatchHelper
-
pod 'JSPatch'
pod 'AFDownloadRequestOperation' - 在
AppDelegate.m导入#import"ZXJSPatchHelper.h" - 在
didFinishLaunchingWithOptions中添加开始使用:
[[ZXJSPatchHelper shareZXJSPatchHelper] startJSPatch:@"demo" withLoadType:JPLoadScriptTypeJSFile];
源码
.h
//
// ZXJSPatchHelper.h
// ZXAutoLayout
//
// Created by Hawk on 5/12/16.
// Copyright © 2016 鹰. All rights reserved.
//
#import <Foundation/Foundation.h>
/**
* Four loaded ways, according to the source of distinction js
*/
typedef NS_ENUM(NSInteger, JPLoadScriptType){
/**
* JS Source string
*/
JPLoadScriptTypeNSString = 0,
/**
* a url can request
*/
JPLoadScriptTypeNSURL,
/**
* project sources
*/
JPLoadScriptTypeSourceJS,
/**
* App Document
*/
JPLoadScriptTypeJSFile,
};
@interface ZXJSPatchHelper : NSObject
+ (instancetype)shareZXJSPatchHelper;
#pragma mark - API
- (void)startJSPatch:(NSString *)script withLoadType:(JPLoadScriptType)loadType;
@end
.m
//
// ZXJSPatchHelper.m
// ZXAutoLayout
//
// Created by Hawk on 5/12/16.
// Copyright © 2016 鹰. All rights reserved.
//
#import "ZXJSPatchHelper.h"
#import "JPEngine.h"
#import "AFDownloadRequestOperation.h"
const NSString * kJSHost = @"http://weixin.qiuyouzone.com/WXGZPT/ios_js/mq.js";
@implementation ZXJSPatchHelper
+ (instancetype)shareZXJSPatchHelper{
static ZXJSPatchHelper * shareInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
shareInstance = [[self alloc] init];
});
return shareInstance;
}
#pragma mark - API
- (void)startJSPatch:(NSString *)script withLoadType:(JPLoadScriptType)loadType {
NSCAssert(script, @"script must not be nil !");
switch (loadType) {
case JPLoadScriptTypeNSString:
[self loadNSStringJS:script];
break;
case JPLoadScriptTypeNSURL:
[self loadNSURLJS:script];
break;
case JPLoadScriptTypeSourceJS:
[self loadSourceJS:script];
break;
case JPLoadScriptTypeJSFile:
[self asyncFetchJSSourceFile:script];
break;
default:
break;
}
}
- (void)asyncFetchJSSourceFile:(NSString *)script {
NSString *filePath = [[self docuemntPath] stringByAppendingString:[NSString stringWithFormat:@"/%@.js",script]];
// // clean local js file whenever request new js source from server
// if([[NSFileManager defaultManager] fileExistsAtPath:filePath]) {
//
// [[NSFileManager defaultManager] removeItemAtPath:filePath error:nil];
// }
NSLog(@"filePatch = %@",filePath);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://weixin.qiuyouzone.com/WXGZPT/ios_js/mq.js"] cachePolicy:NSURLRequestReloadIgnoringLocalAndRemoteCacheData timeoutInterval:3600];
AFDownloadRequestOperation *operation = [[AFDownloadRequestOperation alloc] initWithRequest:request targetPath:filePath shouldResume:YES];
__weak typeof (self) weakSelf = self;
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation * operation, id responseObject) {
[weakSelf loadFileJS:script];
} failure:^(AFHTTPRequestOperation * operation, NSError * error) {
}];
operation.shouldOverwrite = YES;
[operation start];
}
#pragma mark - private
- (void)loadNSStringJS:(NSString *)script {
[JPEngine startEngine];
[JPEngine evaluateScript:script];
}
- (void)loadNSURLJS:(NSString *)script {
[JPEngine startEngine];
[NSURLConnection sendAsynchronousRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:script]] queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
NSString *script = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
[JPEngine evaluateScript:script];
}];
}
- (void)loadSourceJS:(NSString *)script {
[JPEngine startEngine];
NSString *sourcePath = [[NSBundle mainBundle] pathForResource:script ofType:@"js"];
NSString *src = [NSString stringWithContentsOfFile:sourcePath encoding:NSUTF8StringEncoding error:nil];
[JPEngine evaluateScript:src];
}
- (void)loadFileJS:(NSString *)script {
[JPEngine startEngine];
NSString *sourcePath = [[self docuemntPath] stringByAppendingString:[NSString stringWithFormat:@"/%@.js",script]];
NSString *src = [NSString stringWithContentsOfFile:sourcePath encoding:NSUTF8StringEncoding error:nil];
[JPEngine evaluateScript:src];
}
#pragma mark - mothods
- (NSString *)docuemntPath
{
NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *ourDocuemntPath = [documentPaths objectAtIndex:0];
return ourDocuemntPath;
}
@end
