获取app安装时间

可以变相获取文件创建时间

NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

NSDictionary *FileInfo = [[NSFileManager defaultManager] attributesOfItemAtPath:path error:nil];//获取文件信息

id firstData = [FileInfo objectForKey:NSFileCreationDate];//获取文件创建

NSLog(@"%@",firstData);

待真机检测!!!!!!!!!!!!!!!!!!!!!!!!