UICollectionView崩潰，因爲佈局參數是「無」..但它不是 - Swift

我正在構建一個具有自定義collectionCell的UICollectionView。但我得到的錯誤：UICollectionView崩潰，因爲佈局參數是「無」..但它不是 - Swift

*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'UICollectionView must be initialized with a non-nil layout parameter'

但你可以從代碼中看到，我很明確地創建佈局和初始化集合視圖時，把它當作一個PARAM。

import UIKit 

private let reuseIdentifier = "Cell" 

class ProfileViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout { 

override func viewDidLoad() { 
    super.viewDidLoad() 
    sentMngr.retrieveSent() 
    let flow = UICollectionViewFlowLayout() 
    flow.sectionInset = UIEdgeInsets(top: 20, left: 10, bottom: 10, right: 10) 
    flow.itemSize = CGSize(width: 90, height: 90) 
    flow.scrollDirection = UICollectionViewScrollDirection.Vertical 

    self.collectionView = UICollectionView(frame: self.view.frame, collectionViewLayout: flow) 
    self.collectionView!.dataSource = self 
    self.collectionView!.delegate = self 
    self.collectionView!.backgroundColor = UIColor.blackColor() 
    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Register cell classes 
    self.collectionView!.registerClass(CollectionCell.self, forCellWithReuseIdentifier: reuseIdentifier) 
    self.view.addSubview(self.collectionView!) 

    // Do any additional setup after loading the view. 
}

自定義單元代碼：

import UIKit 

class CollectionCell: UICollectionViewCell { 
var imageView: UIImageView! 
/* 
// Only override drawRect: if you perform custom drawing. 
// An empty implementation adversely affects performance during animation. 
override func drawRect(rect: CGRect) { 
    // Drawing code 
} 
*/ 
override init(frame: CGRect) { 
    super.init(frame: frame) 

    imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: frame.size.width, height: frame.size.height*2/3)) 
    imageView.contentMode = UIViewContentMode.ScaleAspectFit 
    self.addSubview(imageView) 

} 

required init?(coder aDecoder: NSCoder) { 
    fatalError("init(coder:) has not been implemented") 
} 

}

來源

2016-03-03 broderickga

您是否嘗試過乾淨重建項目初始化工作得很好？（Cmd + Shift + K） – shpasta

yes no success .. – broderickga

您的視圖控制器繼承自'UICollectionViewController'，因此您不需要初始化新的集合視圖並將其分配給'self.collectionView'。嘗試刪除該行並查看會發生什麼。 – AdamPro13

嘗試更換你的代碼爲：

import UIKit 

private let reuseIdentifier = "Cell" 

class ProfileViewController: UICollectionViewController, UICollectionViewDelegateFlowLayout { 

override func viewDidLoad() { 
    super.viewDidLoad() 

    sentMngr.retrieveSent() 

    self.collectionView!.backgroundColor = UIColor.blackColor() 
    // Uncomment the following line to preserve selection between presentations 
    // self.clearsSelectionOnViewWillAppear = false 

    // Register cell classes 
self.collectionView!.registerClass(CollectionCell.self, forCellWithReuseIdentifier: reuseIdentifier) 
    self.view.addSubview(self.collectionView!) 

    // Do any additional setup after loading the view. 
}

來源

2016-03-03 04:14:08

雨燕3.0

我所面臨的應用程序，一旦崩潰了同樣的問題隨着它啓動。當像下面

var alarmCollectionView = UICollectionView(frame: CGRect.zero, collectionViewLayout: UICollectionViewFlowLayout.init())

我使用這麼用的autoLayout CGRect.zero幀

來源

2016-12-01 04:34:54 Koushik

UICollectionView崩潰，因爲佈局參數是「無」..但它不是 - Swift

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