iOS开发 用masonry设置collection的高度时报错

设置make.height.mas_equalTo(500);后报错

 [self.view addSubview:self.categoryDetailView];
    [self.categoryDetailView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(64);
        make.right.mas_equalTo(0);
        make.width.mas_equalTo([UIScreen mainScreen].bounds.size.width-100);
        make.height.mas_equalTo(500);
    }];

下面是流水布局

 - (UICollectionViewFlowLayout *)flowlayout{
    if (!_flowlayout) {
        _flowlayout = [[UICollectionViewFlowLayout alloc]init];
        _flowlayout.sectionInset = UIEdgeInsetsMake(5, 5, 5, 5);
        _flowlayout.itemSize = CGSizeMake(100, 100);
        //横向间距
        _flowlayout.minimumInteritemSpacing = 5;
        //纵向间距
        _flowlayout.minimumLineSpacing = 10;
    }
    return _flowlayout;
}

下面是UICollectionView的初始化

 - (UICollectionView *)categoryDetailView{
    if (!_categoryDetailView) {


        _categoryDetailView = [[UICollectionView alloc]initWithFrame:CGRectZero collectionViewLayout:self.flowlayout];

        _categoryDetailView.delegate = self;
        _categoryDetailView.dataSource = self;
        _categoryDetailView.backgroundColor = [UIColor greenColor];

        [_categoryDetailView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"item"];
    }
    return _categoryDetailView;
}

错误描述* Assertion failure in -[MASViewConstraint setSecondViewAttribute:], /Users/a1/tuyy/ChinaUnion/ChinaUnion/Lib/Masonry/MASViewConstraint.m:130

真的纠结了，请大神帮我看看

你好，解决了吗，我也遇到这样的问题了

应该是还少个bottom约束 contentview无法推算出高度

可以打断点分段测试一下、、我之前遇到过、问题是控件没有被初始化出来就使用它的位置了

总于解决了, 还是自己代码的问题

我的是两个collectionView之间布局有点冲突