![](/img/trans.png)
[英]Error When Registering Header in UICollectionViewCell iOS Swift 4
[英]iOS swift UICollectionviewcell snapshot error
當我嘗試對UICollectionview中的某個UICollectionViewCell進行快照時,該UICollectionview是View的子視圖,並從我的應用程序在Facebook上共享它。
致命錯誤:解開Optional值時意外發現nil
這是我的功能
func screenshotBSCell() {
//Create the UIImage
UIGraphicsBeginImageContext(CGSizeMake(bsCell.bounds.size.width, bsCell.bounds.size.height))
***self.bsCell.layer.renderInContext(UIGraphicsGetCurrentContext()!)***
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
//Save it to the camera roll
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
//share the image to Social Media
let composeSheet = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
composeSheet.setInitialText("Hello, Facebook!")
composeSheet.addImage(image)
presentViewController(composeSheet, animated: true, completion: nil)
}
func screenshotBSCell( sender:AnyObject) {
//Create the UIImage
let indexpath = NSIndexPath.init(row: sender.tag, section: 0)
self.bsCell = colletctionview!.dequeueReusableCellWithReuseIdentifier("cell", forIndexPath: indexPath ) as! bsCell
UIGraphicsBeginImageContext(CGSizeMake(cell.bounds.size.width, cell.bounds.size.height))
***self.bsCell.layer.renderInContext(UIGraphicsGetCurrentContext()!)***
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
//Save it to the camera roll
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
//share the image to Social Media
let composeSheet = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
composeSheet.setInitialText("Hello, Facebook!")
composeSheet.addImage(image)
presentViewController(composeSheet, animated: true, completion: nil)
}
像這樣制作函數。它將解決您的問題。當您調用此函數時,它會為您創建一個單元格,因此不會得到nil單元格
現在,它正在進行最小的更改。 感謝大家!
func screenshotPulseCell(sender: UIButton) {
//Create the UIImage
UIGraphicsBeginImageContext(plCell.frame.size)
self.plCell.contentView.layer.renderInContext((UIGraphicsGetCurrentContext())!)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
//Save it to the camera roll
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil)
//share the image to Social Media
let composeSheet = SLComposeViewController(forServiceType: SLServiceTypeFacebook)
composeSheet.setInitialText("My Pulse!")
composeSheet.addImage(image)
presentViewController(composeSheet, animated: true, completion: nil)
}
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.