ios - UICollectionView 框架变化

Question

我在 SO 上看到的答案似乎都没有回答这个问题。我正在尝试更改 UICollectionView 的框架。记录时会显示帧更改，但不会实际更改帧。我没有对其设置任何限制。只是改变框架。就这样。我正在创建一个不可滚动的 UICollectionView。

    _testStringOne = @"Test String";
    _tagOne = [_testStringOne boundingRectWithSize:CGSizeMake(242.0f, 900.0f) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont fontWithName:@"Helvetica" size:15.0f]} context:nil];

    _testStringTwo = @"Another Test String";
    _tagTwo = [_testStringTwo boundingRectWithSize:CGSizeMake(242.0f, 900.0f) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont fontWithName:@"Helvetica" size:15.0f]} context:nil];

    CGRect collectionFrame = self.collectionView.frame;
    if (_tagOne.origin.x + _tagOne.size.width + _tagTwo.origin.x + _tagTwo.size.width > 242.0f)
    {
        collectionFrame.size.height = 62.0f;
        sectionCount = 2;
        itemCount = 1;
    }
    else
    {
        collectionFrame.size.height = 31.0f;
        sectionCount = 1;
        itemCount = 2;
    }
    self.collectionView.frame = collectionFrame;
    [self.collectionView reloadData];

Answer 1

在纵向和横向方向之间切换时，我遇到了类似的问题。之后工作正常

self.collectionView.autoresizingMask = UIViewAutoresizingFlexibleHeight |
UIViewAutoresizingFlexibleWidth;