我已经实现了一个UICollectionView,单元格大小是w90 h90.当我在iPhone 6上运行它时,我得到了单元格之间的适当间距,但是当我在iPhone 5上做到这一点,我在单元格之间获得更多的间距.我的问题是我如何根据设备屏幕尺寸改变单元格大小,假设如果单元格大小是w80 h80,我在iPhone 5上得到正确的结果.我目前正在做的是
override func viewWillAppear(animated: Bool) {
var scale = UIScreen.mainScreen().scale as CGFloat
println("Scale :\(scale)")
var cellSize = (self.collectionViewLayout as UICollectionViewFlowLayout).itemSize
println("Cell size :\(cellSize)")
imageSize = CGSizeMake(cellSize.width * scale,cellSize.height * scale)
println("Image size : \(imageSize)")
}
// sizeForItemAtIndexPath
func collectionView(collectionView: UICollectionView,layout collectionViewLayout: UICollectionViewLayout,sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize
{
return imageSize!
}
iPhone 6结果：
结果在iPhone 5s
Objective-C / Swift对于解决方案都很好.
谢谢.
解决方法
步骤1：实现UICollectionViewDelegateFlowLayout(如果没有完成).
步骤2：使用UICollectionViewDelegateFlowLayout的委托方法.
func collectionView(collectionView: UICollectionView,sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize
{
return CGSizeMake((UIScreen.mainScreen().bounds.width-15)/4,120); //use height whatever you wants.
}
步骤3：转到XIB或StoryBoard,您拥有您的CollectionView.
步骤4：在XIB或StoryBoard中,您有CollectionView单击CollectionView.
步骤5：转到InterfaceBuilder,然后在最后一个选项卡(即：尺寸检查器)中设置最小间距
对于细胞= 5
对于线= 5
就这样
Note:
- This solution is for if you wants to make spacing between cell = 5.
- If your spacing is different then 5,then you need to change value 15 in delegate method.
- Ex: Spacing between cell = 10,then change delegate 15 to 10×3 = 30
return CGSizeMake((UIScreen.mainScreen().bounds.width-30)/4,120);
>并设置最小间距
For Cells = 10
For Lines = 10
反之亦然.
Swift 3版本
func collectionView(_ collectionView: UICollectionView,sizeForItemAt indexPath: IndexPath) -> CGSize {
let width = UIScreen.main.bounds.width
return CGSize(width: (width - 10)/3,height: (width - 10)/3) // width & height are the same to make a square cell
}
