iOS利用RunTime机制添加热补丁

来源：互联网发布：淘宝数据分析教程编辑：程序博客网时间：2024/04/27 10:18

原文链接

http://www.cnblogs.com/machao/p/5198555.html?utm_source=tuicool&utm_medium=referral

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

- (void)hotfix {        // 获得应用程序沙盒的Downloads文件夹路径        QKYGuideAccount *guideAccount = [QKYAccountTool guideAccount];        NSArray *arrDownloadPaths =  NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES);    NSString *loadPathsPath=[arrDownloadPaths objectAtIndex:0];    NSString *patchPath = [loadPathsPath stringByAppendingPathComponent:[NSString stringWithFormat:@"patch_%@.js",guideAccount.patchVersion.length ? guideAccount.patchVersion : @"0"]];    NSFileManager *fileManager = [NSFileManager defaultManager];    BOOL isdir = NO;    if ([fileManager fileExistsAtPath:patchPath isDirectory:&isdir]) {        [JPEngine startEngine];        [JPEngine evaluateScript:[NSString stringWithContentsOfFile:patchPath encoding:NSUTF8StringEncoding error:nil]];    };        QKYLog(@"Downloads path: %@",patchPath);}

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，//处理热修复

//处理热修复    self.dataController = [[QKYListDataController alloc] init];    [self.dataController getIsNeedHotfixResultWithSuccessBlock:^(QKYIsNeedHotfixResult *  _Nonnull success, BOOL last) {                if (success.code.integerValue == 1 && success.newpatch.integerValue == 1) {// 现在补丁            [self.dataController downloadpatchWithUrl:success.patchurl];        }                    } errorMsgBlock:^(NSError * _Nullable error, id  _Nullable msgBody) {            }];        NSDictionary *infoDictionary = [[NSBundle mainBundle] infoDictionary];    NSString *version            = [infoDictionary objectForKey:@"CFBundleShortVersionString"];    NSMutableDictionary *dicM = [NSMutableDictionary dictionary];    [dicM setValue:@"2" forKey:@"comefrom"];    [dicM setValue:version forKey:@"patchappversion"];    QKYGuideAccount *guide = [QKYAccountTool guideAccount];    [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

- (void)downloadpatchWithUrl:(NSString *)url {        if (!url) return;        NSURLSessionConfiguration *configuration = [NSURLSessionConfiguration defaultSessionConfiguration];        AFURLSessionManager *manager = [[AFURLSessionManager alloc] initWithSessionConfiguration:configuration];        manager.responseSerializer = [AFHTTPResponseSerializer serializer];        NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];        NSProgress *downloadProgress = nil;        NSURLSessionDownloadTask *downloadTask = [manager downloadTaskWithRequest:request progress:&downloadProgress destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {                NSURL *downloadURL = [[NSFileManager defaultManager] URLForDirectory:NSDocumentDirectory inDomain:NSUserDomainMask appropriateForURL:nil create:NO error:nil];        return [downloadURL URLByAppendingPathComponent:[NSString stringWithFormat:@"patch_%@.js",self.result.patchversion]];            } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {                 if (error) {            return ;        }        QKYGuideAccount *account = [QKYAccountTool guideAccount];        account.patchVersion = self.result.patchversion;        [QKYAccountTool saveGuideAccount:account];                [appDelegate hotfix];                    }];    [downloadTask resume];}

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，

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