ios – 自定义UICollectionViewCell自动布局NSInternalInconsistencyException错误

我正在继承UICollectionViewCell并使用自动布局在代码中进行所有布局.这是我的init方法：

- (id)initWithFrame:(CGRect)frame{
    frame = CGRectMake(0,403,533);
    if (self = [super initWithFrame:frame]) {
        self.translatesAutoresizingMaskIntoConsTraints = NO;

        PBCardPricesViewController *pricesView = [[PBCardPricesViewController alloc] init];
        [self addSubview:pricesView.view];

        UIImageView *BACkground = [[UIImageView alloc] initWithImage:[UIImage imagenamed:@"CardBACkground"]];
        [self addSubview:BACkground];

        [self addConsTraints:[NSLayoutConsTraint consTraintsWithVisualFormat:@"|-(20)-[BACkground]|" options:0 metrics:nil views:@{@"BACkground":BACkgrounD}]];
        [self addConsTraint:[NSLayoutConsTraint consTraintWithItem:pricesView.view attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:BACkground attribute:NSLayoutAttributeLeft multiplier:1 constant:0]];

        [self addConsTraints:[NSLayoutConsTraint consTraintsWithVisualFormat:@"V:|[BACkground]|" options:0 metrics:nil views:@{@"BACkground":BACkgrounD}]];
        [self addConsTraint:[NSLayoutConsTraint consTraintWithItem:pricesView.view attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:BACkground attribute:NSLayoutAttributeTop multiplier:1 constant:0]];
    }

    return self;
}

当我注释掉translateAutoresizingMask行时,我得到：

Unable to simultaneously satisfy consTraints.

    Probably at least one of the consTraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted consTraint or consTraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConsTraints that you don't understand,refer to the documentation for the UIView property translatesAutoresizingMaskIntoConsTraints) 

(

    "<NSLayoutConsTraint:0x1d83f540 H:[UIImageView:0x1d83f950]-(0)-|   (Names: '|':PBCardViewCollectionCell:0x1d83b970 )>","<NSAutoresizingMaskLayoutConsTraint:0x1c55ad20 h=--& v=--& H:[PBCardViewCollectionCell:0x1d83b970(393)]>","<NSAutoresizingMaskLayoutConsTraint:0x1c559410 h=--& v=--& UIImageView:0x1d83f950.midX == + 191.5>","<NSAutoresizingMaskLayoutConsTraint:0x1c559450 h=--& v=--& H:[UIImageView:0x1d83f950(383)]>"

)



Will attempt to recover by breaking consTraint 

<NSLayoutConsTraint:0x1d83f540 H:[UIImageView:0x1d83f950]-(0)-|   (Names: '|':PBCardViewCollectionCell:0x1d83b970 )>



Break on objc_exception_throw to catch this in the debugger.

The methods in the UIConsTraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be Helpful.

当我不这样做时,我收到此错误：
由于未捕获的异常’NSInternalInconsistencyException’而终止应用程序,原因：’执行-layoutSubviews后仍需要自动布局. UICollectionView的-layoutSubviews实现需要调用super.
如何让它显示我想要的方式？我错过了什么？