【发布时间】：2017-01-17 10:07:17
【问题描述】：
我是 iOS 新手，但可以使用 Swift 3 编写代码。我根本不懂 Objective-C。
我正在学习UICollectionView，并且我有一组字符串数组。当我将自定义宽度设置为单元格时，它效果不佳。标签相互重叠。之后，当我使用 flowLayout 时，它会修剪标签。一行中5个单元格的确定数量也是固定的。
这是我的代码：
class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
let reuseIdentifier = "cell"
var items = ["12", "2", "3221", "434", "52342","5646445646454464654646464", "bdvjsd", "adscfaaaw", "How are you?"];
@IBOutlet weak var flowLayout: UICollectionViewFlowLayout!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: reuseIdentifier, for: indexPath as IndexPath) as! MyCollectionViewCell
cell.myLabel.text = self.items[indexPath.item]
cell.backgroundColor = UIColor.yellow
let a = (items[indexPath.item]).size(attributes: nil)
cell.frame.size.width = a.width + 20
return cell
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
// handle tap events
flowLayout.minimumInteritemSpacing = 5.0
print("You selected cell #\((items[indexPath.item]).size(attributes: nil).width)!")
}
}
这是我的截图：
最后我希望输出像每个单元格单独出现，没有重叠，也没有标签修剪。如果“你好吗？”标签的宽度是 x 那么包含该标签的单元格的宽度必须为 x+20（它只是假设）并且该标签或单元格不应与任何其他单元格或标签重叠
更新 1
这里是代码如果我改变了。
class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource {
let reuseIdentifier = "cell"
var items = ["12", "2", "3221", "434", "52342","5646445646454464654646464", "bdvjsd", "adscfaaaw", "How are you?"];
var x:[Double] = []
var tempItems:[String] = []
var flag = true
@IBOutlet weak var flowLayout: UICollectionViewFlowLayout!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.items.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath as IndexPath)
let label: UILabel = (cell.viewWithTag(15) as! UILabel)
label.text = self.items[indexPath.item]
return cell
}
// collectionview layoutflow method. first this method call then other delagates method call.
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
let Labell : UILabel = UILabel()
Labell.text = self.items[indexPath.item]
let labelTextWidth = Labell.intrinsicContentSize.width
return CGSize(width: labelTextWidth + 12, height: 35)
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
// handle tap events
print("You selected cell #\(indexPath.item)!")
}
}
而且输出是一样的：
【问题讨论】：
-
flowLayout.minimumInteritemSpacing = 5.0 评论这一行并检查它
-
@HimanshuMoradiya 修剪不是问题。但重叠是。我做了修剪以展示我尝试了很多方法但不起作用的例子
-
我对你的问题有点困惑，只需用你想要的实际输出来更新你的问题。
-
@HimanshuMoradiya 我已经更新了我的问题
-
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize { if collectionView == coll_degree { let labelTextWidth = self.dict_treatment_profile.valueForKey("degree_acheive")?. valueForKey("degree_name")?.objectAtIndex(indexPath.row) as? String.intrinsicContentSize().width return CGSize(width: labelTextWidth + 20, height: 45) }
标签： ios swift uicollectionview swift3 uicollectionviewcell