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应用程序崩溃，并显示以下错误：加载tableview时出现错误“无效的更新：无效的部分数量”时，应用程序崩溃。
Invalid update: invalid number of sections. The number of sections contained in the table view after the update (6) must be equal to the number of sections contained in the table view before the update (3), plus or minus the number of sections inserted or deleted (0 inserted, 0 deleted).' Please Help
我的代码：
func numberOfSections(in tableView: UITableView) -> Int {
return newsArray.count
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return 1
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "CellID", for: indexPath) as? NewsTableViewCell
cell?.contentView.backgroundColor = UIColor.clear
let whiteRoundedView : UIView = UIView(frame: CGRect(x: 10, y: 4, width: self.view.frame.size.width - 20, height: 410))
whiteRoundedView.layer.backgroundColor = CGColor(colorSpace: CGColorSpaceCreateDeviceRGB(), components: [1.0, 1.0, 1.0, 0.9])
whiteRoundedView.layer.masksToBounds = false
whiteRoundedView.layer.cornerRadius = 2.0
whiteRoundedView.layer.shadowOffset = CGSize(width: -1, height: 1)
whiteRoundedView.layer.shadowOpacity = 0.2
cell?.contentView.addSubview(whiteRoundedView)
cell?.contentView.sendSubview(toBack: whiteRoundedView)
let newsdata = newsArray[indexPath.section]
let date = NSDate(timeIntervalSince1970: TimeInterval(newsdata.meta))
let dayTimePeriodFormatter = DateFormatter()
dayTimePeriodFormatter.dateFormat = "MMM dd YYYY "
let dateString = dayTimePeriodFormatter.string(from: date as Date)
print(dateString)
if let newsImg = self.newsImageCache.object(forKey: indexPath.section as AnyObject){
cell?.imageOut.image = newsImg as? UIImage
} else {
loadImageFromWeb(uri: newsdata.photo, cache: self.newsImageCache, indexpath: indexPath)
}
cell?.titleLabel.text = newsdata.title
cell?.descLabel.text = newsdata.body
return cell!
}
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
if indexPath.section + 3 == self.newsArray.count {
loadDatafromUrl()
}
}
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
return 20
}
// Make the background color show through
func tableView(_ tableView: UITableView, viewForHeaderInSection section: Int) -> UIView? {
let headerView = UIView()
headerView.backgroundColor = UIColor.clear
return headerView
}
func loadDatafromUrl(){
let uri = "http://localhost/unani-info/admin/json/news.php"
print(uri)
if let url = URL(string: uri){
let config = URLSessionConfiguration.default
config.requestCachePolicy = .reloadIgnoringLocalAndRemoteCacheData
let session = URLSession(configuration: config)
let task = session.dataTask(with: url, completionHandler: {
(rawData,response,error) in
if error != nil {
print("Couldnt load data")
print(error?.localizedDescription as Any)
} else {
if let data = rawData {
do{
if let json = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [AnyObject]{
for index in 0...json.count-1 {
if let datas = json[index] as? [String: AnyObject] {
let newsObj = News()
newsObj.title = datas["title"] as! String
newsObj.body = datas["body"] as! String
let photo = datas["photo"] as! String
let photourl = "http://localhost/unani-info/admin/uploads/" + photo
newsObj.photo = photourl
newsObj.meta = datas["meta"] as! Int
self.newsArray.append(newsObj)
}
}
DispatchQueue.main.async {
self.tableView.reloadData()
}
}
}catch{
print("error")
}
}
}
})
task.resume()
}
}
谢谢你的回复，但它花费太多时间在tableview中加载数据。 –
你能否建议一个适当的tableview分页方法..？ –
@YasheedMohammed恐怕我不能... – iWheelBuy