问题描述

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