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:];
NSString *patchPath = [loadPathsPath stringByAppendingPathComponent:[NSString stringWithFormat:@"patch_%@.js",guideAccount.patchVersion.length ? guideAccount.patchVersion : @""]];
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
self.dataController = [[QKYListDataController alloc] init];
[self.dataController getIsNeedHotfixResultWithSuccessBlock:^(QKYIsNeedHotfixResult * _Nonnull success, BOOL last) { if (success.code.integerValue == && success.newpatch.integerValue == ) {// 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:@"" forKey:@"comefrom"];
[dicM setValue:version forKey:@"patchappversion"];
QKYGuideAccount *guide = [QKYAccountTool guideAccount];
[dicM setValue:guide.patchVersion.length ? guide.patchVersion : @"" 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，