Question

我将从数据库中提取的数据添加到CollectionView。我将添加为数组的数据放入模型数组中。我在collectionView中看到了Array中的数据。有时数据平滑添加，但有时却出现错误

“线程1：致命错误：索引超出范围”

。有时在工作时有时为什么不呢？我认为collectionView.reloadData（）有问题。

@IBOutlet weak var sonsuzCollec: UICollectionView!
var model = [[String]]()
var davetiyefilee = [String]()
var davetiyefilee2 = [String]()

extension denemeView: UICollectionViewDelegate, UICollectionViewDataSource,  UICollectionViewDelegateFlowLayout {
    if (collectionView == sonsuzCollec) {
        return model[section].count
    }
    func numberOfSections(in collectionView: UICollectionView) -> Int {
        if (collectionView == sonsuzCollec) {
            return yeniDavKATIsımNew.count
        }
        return 0
    }
...
}

@objc func davetiyeCEK1() {
    if let baslik = try JSONSerialization.jsonObject(with: data, options: []) as? [[String: Any]] {
        for review in baslik {
            if let soru_baslik = review["davetiyefilee"] as? String {
                let s = String(describing: soru_baslik)
                self.davetiyefilee.append(s)
            }
        }
        self.model.append(self.davetiyefilee)
        DispatchQueue.main.async { [weak self] in
            self?.sonsuzCollec?.reloadData() 
        }  
    }
}

@objc func davetiyeCEK2() {
    if let baslik = try JSONSerialization.jsonObject(with: data, options: []) as? [[String: Any]] {
        for review in baslik {
            if let soru_baslik = review["davetiyefilee"] as? String {
                let s = String(describing: soru_baslik)
                self.davetiyefilee2.append(s)
            } 
        }
        self.model.append(self.davetiyefilee2)
        DispatchQueue.main.async { [weak self] in
            self?.sonsuzCollec?.reloadData()
        }
    }
}

Answer 1

我认为这是因为模型数组的section项目为空。您正在使用多少个收藏夹？您可以显示更多完整代码吗？

或者您的编号中有另一个方法可以尝试

if (collectionView == sonsuzCollec) {
        var numberofRows = 0
        if model[section].count > 0 {
            numberofRows = model[section].count
        } else {
             numberofRows = 0
        }
        return  numberofRows
    }

CollectionView Reloaddata-致命错误：索引超出范围

1 个答案: