ios 由于苹果的审核政策，一旦上线后发现bug是件让人崩溃的事情
不过可以利用oc的runtime机制可以家用JSPatch动态的为工程打热补丁
下载地址：https://github.com/agelessman/JSPatch.git
如果不用cocoapods导入的话，不需要修改，如果拖到工程的，需要改头文件，
例如： #import “abc.h”
在appdelegate中添加类似下边的方法，写一个本地的属性记录补丁的版本号，如果文件存在，再调用
1 - (void)hotfix { 2 3 // 获得应用程序沙盒的Downloads文件夹路径 4 5 QKYGuideAccount *guideAccount = [QKYAccountTool guideAccount]; 6 7 NSArray *arrDownloadPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); 8 NSString *loadPathsPath=[arrDownloadPaths objectAtIndex:0]; 9 NSString *patchPath = [loadPathsPath stringByAppendingPathComponent:[NSString stringWithFormat:@"patch_%@.js",guideAccount.patchVersion.length ? guideAccount.patchVersion : @"0"]]; 10 NSFileManager *fileManager = [NSFileManager defaultManager]; 11 BOOL isdir = NO; 12 if ([fileManager fileExistsAtPath:patchPath isDirectory:&isdir]) { 13 [JPEngine startEngine]; 14 [JPEngine evaluateScript:[NSString stringWithContentsOfFile:patchPath encoding:NSUTF8StringEncoding error:nil]]; 15 }; 16 17 QKYLog(@"Downloads path: %@",patchPath); 18 }
在控制器中添加下边的方法，目的就是发请求到服务器，获取是否更新，
1 //处理热修复 2 self.dataController = [[QKYListDataController alloc] init]; 3 [self.dataController getIsNeedHotfixResultWithSuccessBlock:^(QKYIsNeedHotfixResult * _Nonnull success, BOOL last) { 4 5 if (success.code.integerValue == 1 && success.newpatch.integerValue == 1) {// 现在补丁 6 [self.dataController downloadpatchWithUrl:success.patchurl]; 7 } 8 9 10 } errorMsgBlock:^(NSError * _Nullable error, id _Nullable msgBody) { 11 12 }]; 13 14 NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary]; 15 NSString *version = [infoDictionary objectForKey:@"CFBundleShortVersionString"]; 16 NSMutableDictionary *dicM = [NSMutableDictionary dictionary]; 17 [dicM setValue:@"2" forKey:@"comefrom"]; 18 [dicM setValue:version forKey:@"patchappversion"]; 19 QKYGuideAccount *guide = [QKYAccountTool guideAccount]; 20 [dicM setValue:guide.patchVersion.length ? guide.patchVersion : @"0" forKey:@"patchversion"];
需要说明的是这里的dataController 是一个模型，下载补丁的方法封装到了这个模型中
在下载的条件成熟的情况下，下载附件
1 - (void)downloadpatchWithUrl:(NSString *)url { 2 3 if (!url) return; 4 5 NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration]; 6 7 AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration]; 8 9 manager.responseSerializer = [AFHTTPResponseSerializer serializer]; 10 11 NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]]; 12 13 NSProgress *downloadProgress = nil; 14 15 NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:&downloadProgress destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) { 16 17 NSURL *downloadURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil]; 18 return [downloadURL URLByAppendingPathComponent:[NSString stringWithFormat:@"patch_%@.js",self.result.patchversion]]; 19 20 } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) { 21 22 23 if (error) { 24 return ; 25 } 26 QKYGuideAccount *account = [QKYAccountTool guideAccount]; 27 account.patchVersion = self.result.patchversion; 28 [QKYAccountTool saveGuideAccount:account]; 29 30 [appDelegate hotfix]; 31 32 33 }]; 34 35 [downloadTask resume]; 36 }
下载成功后保存最新的补丁号到本地属性中，调用JSPatch，让刚下载的代码生效
需要特别说明的是，加载补丁文件，是有顺序的，例如0，1，2 而且补丁文件中使用的是js的代码，
能够帮助我的功能：
1 修复导致崩溃的错误
2 替换原来的方法
3.添加新的方法
4 替换原来的界面
等等，更多功能，有待研究
有问题可以写评论哦，