xcode 调整 UICollectionView 高度
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Resize UICollectionView Height
提问by Neil Faulkner
I'm trying to resize a UICollectionView height by setting it to 0 when the view controller is loaded, then increasing its size with an animation when a button is pressed. I've tried a few different things but it doesn't change in size at all. Here's all the different things I've tried to change its height to 0:
我试图通过在加载视图控制器时将其设置为 0 来调整 UICollectionView 高度的大小，然后在按下按钮时通过动画增加其大小。我尝试了一些不同的东西，但它的大小根本没有改变。这是我尝试将其高度更改为 0 的所有不同内容：
CGRect bounds = [self.collectionView bounds];
[self.collectionView setBounds:CGRectMake(bounds.origin.x,
bounds.origin.y,
bounds.size.width,
bounds.size.height - 100)];
....
....
CGRect frame = [self.collectionView frame];
[self.collectionView setFrame:CGRectMake(frame.origin.x,
frame.origin.y,
frame.size.width,
frame.size.height - 100)];
....
....
CGRect frame = self.collectionView.frame;
frame.size.height -= 100;
self.collectionView.frame = frame;
....
....
self.collectionView.clipsToBounds = YES;
self.collectionView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
回答by pav
If you are using Interface Builder for UICollectionView initialisation, switch off "Use Autolayout" from the File Inspector in the xib file where the your CollectionView is created. Then you can change the height with setFrame or setBounds methods.
如果您使用 Interface Builder 进行 UICollectionView 初始化，请从创建 CollectionView 的 xib 文件中的文件检查器中关闭“使用自动布局”。然后您可以使用 setFrame 或 setBounds 方法更改高度。
回答by sheepgobeep
You can avoid disabling Autolayout by creating an outlet for the height constraint and then adjusting the constraint's constant in code.
您可以通过为高度约束创建一个出口，然后在代码中调整约束的常量来避免禁用自动布局。
Outlet
出口
@IBOutlet weak var collectionViewVerticalConstraint: NSLayoutConstraint!
Adjustment
调整
collectionViewVerticalConstraint.constant = 0
