- (AccountManager *)shared { static AccountManager *_sharedManager; static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ _sharedManager = [[AccountManager alloc] init]; }); return _sharedManager; }
#pragma mark 获取token的静态方法
- (NSString*)token { NSString *token = [[[self class] sharedInstance] token]; return token; }