我是IOS开发中的新手。我得到了工作来制作日历应用程序。我使用UICollectionViewCell显示1-30天。对于喜欢＆＃34; S M T W TH F S＆＃34;我使用补充视图（headerCell）并添加7 UILabels，其SPACING与两个单元格之间的距离相同。我看到Daynames没有与Day Numbers垂直对齐。我已将UICollectionViewDelegateFlowLayout扩展为将minimumInteritemSpacingForSectionAtIndex设置为2，并且我将单元格大小设置为每行仅显示7天（1周）。
我还使用它们的中心计算了2个单元格之间的距离，将该距离作为参考，并将其添加为HeaderCell中标签之间的距离，但它们仍然没有对齐。
我希望精确计算UICollectionView中单元格之间的距离。我们设置的间距只是最小值，有时根据iPhone的屏幕尺寸而有所不同。
这是Pic： missing alignment with day cells 这是我的代码：
extension FirstViewController: UICollectionViewDelegateFlowLayout {
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
var cwidth:CGFloat = 0.0
cwidth = (collectionView.frame.size.width/7 - PADDING - SPACING)
let cheight = collectionView.frame.size.height/7
cellWidth = cwidth
cellHeight = cheight
print("Cell width is \(cellWidth) and view width is \(collectionView.frame.size.width)")
return CGSize(width: cwidth, height: cheight )
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top:1.0,left:1.0,bottom:1.0,right:1.0)
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumLineSpacingForSectionAtIndex section: Int) -> CGFloat {
return 1.0
}
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAtIndex section: Int) -> CGFloat {
return SPACING
}
}
class FirstViewController:
UIViewController,UICollectionViewDataSource,UICollectionViewDelegate
{
func collectionView(collectionView: UICollectionView,
viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath:
NSIndexPath) -> UICollectionReusableView
{
let cell = collectionView.dequeueReusableSupplementaryViewOfKind(kind, withReuseIdentifier: "headerCell", forIndexPath: indexPath)
var prevWidth:CGFloat = 5.0
var frame1 :CGRect? = nil
for (index,i) in daynames.enumerate() {
if (index == 0){
frame1 = CGRect(x: 1.0, y: -2.0, width: cellWidth , height: cellHeight)
}
else{
frame1 = CGRect(x: CGFloat(prevWidth) , y: -2.0,width:cellWidth , height: cellHeight)
}
if (index < 6){
prevWidth = frame1!.origin.x + cellWidth + distances[index] - SPACING
}
let label = UILabel(frame:frame1!)
label.text = i
label.textAlignment = NSTextAlignment.Center
label.textColor = UIColor.whiteColor()
label.font = UIFont(name:"Helvetica",size:16)
label.backgroundColor = UIColor.blackColor()
// label.center.x = cell_centres[index]
cell.addSubview(label)
}
return cell
}
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("Cell", forIndexPath: indexPath)
let label = cell.contentView.viewWithTag(1) as! UILabel
//testing purpose
label.text = String(days[indexPath.row])
if indexPath.row == 0{
cell_centres.removeAll()
}
cell.backgroundColor = UIColor.greenColor()
if indexPath.row < 7{
cell_centres.append(cell.center.x)
print("appending \(cell.center.x)")
}
//code for calc distances between cells
if(prevX == 0){
prevX = cell.center.x
}
else if(indexPath.row < 7){
distance = floor((cell.center.x - prevX) - cellWidth)
print("distance \(distance) ")
distances.append(distance)
prevX = cell.center.x
}
return cell
}
}