[英]Why are cells in the UICollectionView being cut off?
由于某些奇怪的原因,我的UICollectionView中的第一个单元格被切断了。 我使用Interface Builder中的原型单元设计了一个单元。 我设置了一个自定义的高度和约束,但是,在运行该应用程序时,该单元格被切断了。 请查看下面的图片进行说明:
它应该是这样的:
这是运行应用程序时的外观:
这是集合视图所在的类的代码:
override func viewDidLoad() {
super.viewDidLoad()
// set the navigation title
self.navBar.titleTextAttributes = [NSAttributedStringKey.font: UIFont(name: "Trueno", size: 17)!]
self.navBar.topItem?.title = user.username
}
@IBAction func handleSettings(_ sender: Any) {
let action = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let settings = UIAlertAction(title: "Settings", style: .default) { action -> Void in
self.show(ViewController: "SettingScene")
}
let editProfile = UIAlertAction(title: "Edit Profile", style: .default) { action -> Void in
self.show(ViewController: "SettingScene")
}
let cancel = UIAlertAction(title: "Cancel", style: .cancel) { action -> Void in}
action.addAction(editProfile)
editProfile.setValue(UIColor.purple, forKey: "titleTextColor")
action.addAction(settings)
settings.setValue(UIColor.purple, forKey: "titleTextColor")
action.addAction(cancel)
cancel.setValue(UIColor.purple, forKey: "titleTextColor")
present(action, animated: true, completion: nil)
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return user.posts.count + 1
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
var cell: UICollectionViewCell
// add the profile header/info cell if there are no cells inside of the colelction view
if collectionView.visibleCells.count == 0 {
let c = collectionView.dequeueReusableCell(withReuseIdentifier: "ProfileInfoCollectionViewCell", for: indexPath) as! ProfileInfoCollectionViewCell
c.profilePic.layer.cornerRadius = c.profilePic.frame.width / 2
c.profilePic.image = user.profilePic
c.profilePic.clipsToBounds = true
c.name.text = user.name
c.bio.text = user.bio
c.followerCount.text = String(user.followers.count)
c.followingCount.text = String(user.following.count)
c.memeCount.text = String(user.postCount)
cell = c
} else {
let c = collectionView.dequeueReusableCell(withReuseIdentifier: "ProfilePostCollectionViewCell", for: indexPath) as! ProfilePostCollectionViewCell
c.imageView.image = user.posts[indexPath.row - 1].img
cell = c
}
return cell
}
任何解决此问题的帮助将不胜感激。 谢谢!
您可以调用sizeForItemAtIndexPath
委托方法来设置单元格的大小。
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
// Set the size for cell
}
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