大家好,我收到以下错误 - UICollectionView 必须使用非零布局参数初始化
PopularShotsCollectionViewController 的代码-:
import UIKit
private let reuseIdentifier = "Cell"
class PopularShotsCollectionViewController: UICollectionViewController {
private var shots : [Shot] = [Shot](){
didSet{
self.collectionView?.reloadData()
}
}
var API_URl = Config.SHOT_URL
var shotPages = 1
private let leftAndRightPaddings : CGFloat = 32.0
private let numberOFItemsPerRow : CGFloat = 3.0
private let heightAdjustMent : CGFloat = 30.0
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view.
let width = (CGRectGetWidth(collectionView!.frame) - leftAndRightPaddings) / numberOFItemsPerRow
let layout = collectionViewLayout as! UICollectionViewFlowLayout
layout.itemSize = CGSizeMake(width, width + heightAdjustMent)
let popularShot = PopularShotsCollectionViewController()
popularShot.title = "Popular"
popularShot.API_URl = Config.POPULAR_URL
popularShot.loadShots()
}
func loadShots(){
DribbleObjectHandler.getShots(API_URl) { (shots) -> Void in
self.shots = shots
}
let refreshControl = UIRefreshControl()
refreshControl.addTarget(self, action: Selector("refreshInvoked:"), forControlEvents: UIControlEvents.ValueChanged)
collectionView?.addSubview(refreshControl)
}
func refreshInvoked(sender : AnyObject){
sender.beginRefreshing()
collectionView?.reloadData()
sender.endRefreshing()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
// MARK: UICollectionViewDataSource
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
// #warning Incomplete implementation, return the number of items
return shots.count
}
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath) as! PopularShotsCollectionViewCell
// Configure the cell
let shot = shots[indexPath.row]
cell.imageView.sd_setImageWithURL(NSURL(string : shot.imageUrl))
if shots.count - 1 == indexPath.row && shotPages < 5{
shotPages++
print(shotPages)
let url = API_URl + "&page=" + String(shotPages)
DribbleObjectHandler.getShots(url, callback: { (shots) -> Void in
for shot in shots {
self.shots.append(shot)
}
})
}
return cell
}
}
You can have a look at the log also
如果我尝试调试此行之后的任何代码,它会自动崩溃而不告诉
我已经检查了 Main.storyboard,什么也没有,一切都应该是类连接到 View ,委托(delegate)和数据源也是如此
请记住,我只有 12 岁,对 Swift 还很陌生。任何帮助将不胜感激
提前致谢 雅利安·卡什亚普
最佳答案
我不明白为什么你在 viewdidload 中创建它自己的新实例:
let popularShot = PopularShotsCollectionViewController()
popularShot.title = "Popular"
popularShot.API_URl = Config.POPULAR_URL
popularShot.loadShots()
我认为这可能是你陷入循环的问题?
你不能用...
self.title = "Popular"
self.API_URl = Config.POPULAR_URL
self.loadShots()
...在 collectionViewController 加载时在 viewDidLoad 中。
看看这是否会有所不同
关于ios - UICollectionView 必须使用非零布局参数进行初始化。 UICollectionView 快速出错,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34485141/