[英]How to Get Label Text from Selected Collection View Cell with CoreData?
[英]Get info from selected collection view cell
我正在嘗試從集合視圖單元格打印cell.image.text
。
func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath) as! CollectionViewCell
let post = self.arrayOfDetails[indexPath.row]
cell.currentUserLabel.text = post.username
cell.imageText.text = post.text
cell.uploadedTimeLabel.text = post.CreatedAt.timeAgo
cell.imageView.setImageWithUrl(NSURL(string: post.image)!, placeHolderImage: UIImage(named: "Placeholder"))
return cell
}
ArrayOfDetails:
var arrayOfDetails = [Details]()
細節:
struct Details {
var username:String!
var text:String!
var CreatedAt:NSDate!
var image:String!
init(username:String,text:String,CreatedAt:NSDate,image:String){
self.username = username
self.text = text
self.CreatedAt = CreatedAt
self.image = image
}
}
這就像一個Instagram應用程序,因此有多個包含照片和照片文字的單元格,並且我有一個按鈕,當按下按鈕時,它要println(cell.image.text)
。 我怎樣才能做到這一點?
我試過了:
@IBAction func printButton(sender: AnyObject) {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: nil) as! CollectionViewCell
println(cell.imageText.text)
}
但是它沒有顯示任何文字。
與其嘗試獲取單元 ,不如僅獲取數據本身該怎么辦? 不要看collectionView
(強調View ),而是從數據源中提取數據。
你可以用
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
然后在該方法中調用
println(self.arrayOfDetails[indexPath.row].text)
如果您想在用戶選擇單元格時打印出文本。
請原諒我的語法錯誤,我從沒做過swift:D
首先,您創建一個CustomCollectionViewCell,它繼承了CollectionViewCell。
現在在標題中,給它一個printButton屬性:
var printButton: UIButton!
然后在CustomCollectionViewCell類實現中:
// This is lazy loading, everytime something needs to talk to the printButton
// of a cell, it checks if this button exists. If not, it will be created.
lazy var printButton: UIButton =
{
var temporaryButton: UIButton = UIButton()
temporaryButton.frame = self.contentView.bounds;
temporaryButton.addTarget(self action: @selector(printText), forControlEvents: TouchUpInside);
self.contentView.addSubview(temporaryButton);
return temporaryButton;
}()
return _printButton;
}
然后,當子類單元被重用時,您將刪除printButton:
func prepareForReuse()
{
super.prepareForReuse();
self.printButton.removeFromSuperview().
self.printButton = nil;
}
最后,實現您的printText函數
func printText()
{
let cell = collectionView.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: nil) as! CollectionViewCell
println(cell.imageText.text)
}
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