1、沒有停止定時器

- (void)dealloc {
? ? [_timer invalidate];
? ? _timer = nil;
? ??
}

2、VC中有代理Delegate，需要設置delegate的時候，設置為weak

@property?(nonatomic,weak)?id<ZoeEatDelegate>delegate;

3、VC中有Block方法

__weak weakSelf = self;

[_marketView poppingBuyOrSellView:^(QHFinanceBuyOrSellModel *model) {
? ? ? ? ? ? __strong strongSelf = weakSelf;
? ? ? ? ? ? strongSelf.selIndex = 1;
? ? ? ? ? ? strongSelf.selectModel = model;
? ? ? ? ? ? [strongSelf popToBuyOrSellView:model.eType == 2?YES:NO];
? ? ? ? }];

?