swift 3.0 中的 UITableView 错误
UITableView error in swift 3.0
我刚刚将 Xcode 8 中的代码更新为 swift 3，并从我的 tableView 中得到以下错误：
2016-06-21 14:03:16.639567 Fibre[662:223131] * Assertion failure in -[UITableView _configureCellForDisplay:forIndexPath:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3575.10/UITableView.m:7964
2016-06-21 14:03:16.641663 Fibre[662:223131] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView (; layer = ; contentOffset: {0, 0}; contentSize: {383, 88}>) failed to obtain a cell from its dataSource ()'
*** First throw call stack:
(0x1831e5980 0x1827e04bc 0x1831e5854 0x183c09c84 0x1890b065c 0x1892ae2bc 0x1892ae3c0 0x18929c924 0x1892b3084 0x18905340c 0x188f6c58c 0x186490d6c 0x186485aac 0x18648596c 0x1864054fc 0x18642c7c4 0x18642d148 0x183195954 0x183193584 0x183193a14 0x1830c62e4 0x184a9f15c 0x188fda6fc 0x188fd5438 0x100070c3c 0x182c68600)
libc++abi.dylib: terminating with uncaught exception of type NSException
我正在使用 xib 和以下代码：
import Foundation
import Parse
import UIKit
extension UIImageView {
public func imageFromUrl(_ urlString: String) {
if let url = URL(string: urlString) {
let request = URLRequest(url: url)
NSURLConnection.sendAsynchronousRequest(request, queue: OperationQueue.main()) {
(response: URLResponse?, data: Data?, error: NSError?) -> Void in
if let imageData = data as Data? {
self.image = UIImage(data: imageData)
}
}
}
}
}
class offersViewController: UIViewController, UITableViewDelegate {
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var offersView: UIView!
@IBOutlet weak var offerTitleLabel: UILabel!
@IBOutlet weak var smartCode: UILabel!
@IBOutlet weak var customerName: UILabel!
@IBAction func closeButton(sender: AnyObject) {
offersView.isHidden = true
}
var array: [String] = [String]()
var arrayImages: [String] = [String]()
override func viewDidLoad(){
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
self.array.removeAll(keepingCapacity: true)
self.arrayImages.removeAll(keepingCapacity: true)
let nib = UINib(nibName: "vwTblCell", bundle: nil)
tableView.register(nib, forCellReuseIdentifier: "cell")
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE"
let weekDay = dateFormatter.string(from: date)
print(weekDay)
tableView.isHidden = true
let query = PFQuery(className:"offers")
query.whereKey("day", equalTo:"\(weekDay)")
query.findObjectsInBackground {
(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
print("Successfully retrieved \(objects!.count) scores.")
// Do something with the found objects
if let objects = objects {
let birthdayOffer = "£25 free credit on your Birthday!"
let birthdayOfferImage = "birthday"
self.array.append(birthdayOffer as String)
print(self.array)
self.arrayImages.append(birthdayOfferImage as String)
print(self.arrayImages)
for object in objects {
let query = PFQuery(className:"offers")
query.getObjectInBackground(withId: "\(object.objectId!)"){
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let offertitle = gameScore!["offertitle"] as! String
let offerImage = gameScore!["imagename"] as! String
// Add birthday to array
self.array.append(offertitle as String)
print(self.array)
self.arrayImages.append(offerImage as String)
print(self.arrayImages)
}
self.tableView.reloadData()
self.tableView.isHidden = false
}
}
}
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array.count
}
var cell : UITableViewCell?
func tableView(_tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell {
let cell: TblCell = self.tableView.dequeueReusableCell(withIdentifier: "cell",for: indexPath) as! TblCell
let url = URL(string: "https://checkmyweave.co.uk/\(arrayImages[(indexPath as NSIndexPath).row]).png")
cell.offerImage.sd_setImage(with: url)
cell.offerTitleLabel.text = self.array[(indexPath as NSIndexPath).row]
let defaults = UserDefaults.standard()
let userID = defaults.string(forKey: "userID")!
let query = PFQuery(className:"members")
query.getObjectInBackground(withId: "\(userID)") {
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let smartCode = gameScore!["smartcode"] as! String
let defaults = UserDefaults.standard()
let userName = defaults.string(forKey: "userName")!
self.smartCode.text = smartCode
self.customerName.text = userName
} else {
print(error)
}
}
return cell
}
func numberOfSectionsIntableView(_tableView: UITableView) -> Int {
return 1
}
private func tableView(_tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print((indexPath as NSIndexPath).row)
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE"
let weekDay = dateFormatter.string(from: date)
offerTitleLabel.text = self.array[(indexPath as NSIndexPath).row]
offersView.isHidden = false
print(offerTitleLabel.text)
let query = PFQuery(className:"offers")
query.whereKey("offertitle", equalTo:"\(offerTitleLabel.text!)")
query.whereKey("day", equalTo:"\(weekDay)")
query.findObjectsInBackground {
(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
print("Successfully retrieved \(objects!.count) scores.")
// Do something with the found objects
if let objects = objects {
for object in objects {
let query = PFQuery(className:"offers")
query.getObjectInBackground(withId: "\(object.objectId!)"){
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let offerdesc = gameScore!["offerDesc"] as! String
print(offerdesc)
}}}}}}
}
private func tableView(_tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 140
}
}
有谁知道为什么会出现这些错误？
你的行 func tableView(_tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell { 是错误的 - 你正在声明一个函数，它的第一个参数是 _tableView，这意味着它实际上并没有提供返回单元格所需的协议函数。
将其更改为 func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell { - 即输入 space!
从 Swift 2 迁移到 Swift 3 时 all table 必须通过 [=12] 更改视图数据源和委托方法=]
将它们声明为私有并保留语法（没有任何下划线）
private func tableView(tableView : ...)
或使用新语法（见下划线后的space字符）
func tableView(_ tableView : ...)
实际上，编译器应该显示有关该问题的警告以及如何修复它的建议。
尝试
func tableView(_ tableView: UITableView, cellForRowAt indexPath: NSIndexPath) -> UITableViewCell {...}
这是 Swift 3 - XCode 8
的正确解法
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath)
return cell
}
class offersViewController: UIViewController, UITableViewDelegate,UITableViewDataSource { .... }
你好像忘了添加 "UITableViewDataSource"
SWIFT 3.0.1 和 xcode 8.2 Beta
我也遇到同样的错误
如下所述--
*** Assertion failure in
-[UITableView _configureCellForDisplay:forIndexPath:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit- 3599.6.1/UITableView.m:8035
2016-11-24 12:20:59.578026 JJS Connect[1479:587032] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView <UITableView: 0x1010c7400; frame = (0 277; 375 390); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x17005b9f0>; layer = <CALayer: 0x17022d680>; contentOffset: {0, 0}; contentSize: {375, 176}>) failed to obtain a cell from its dataSource (<JJS_Connect.FamilyProfileViewController: 0x100f41660>)'
*** First throw call stack:
我忘记在 Class 文件中声明协议 - UITableViewDataSource，UITableViewDelegate
在我声明 Table 视图的数据源和委托后，它正在工作。
下面提到了Correcway。
class FamilyProfileViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
variable declaration...
Function declaration...
}
如swift 3 tableview 数据源和委托方法已更改，因此您的方法不满足 tableview 要求，正确的方法是：
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
/*...*/
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
/*...*/
}
我刚刚将 Xcode 8 中的代码更新为 swift 3，并从我的 tableView 中得到以下错误：
2016-06-21 14:03:16.639567 Fibre[662:223131] * Assertion failure in -[UITableView _configureCellForDisplay:forIndexPath:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit-3575.10/UITableView.m:7964 2016-06-21 14:03:16.641663 Fibre[662:223131] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView (; layer = ; contentOffset: {0, 0}; contentSize: {383, 88}>) failed to obtain a cell from its dataSource ()' *** First throw call stack: (0x1831e5980 0x1827e04bc 0x1831e5854 0x183c09c84 0x1890b065c 0x1892ae2bc 0x1892ae3c0 0x18929c924 0x1892b3084 0x18905340c 0x188f6c58c 0x186490d6c 0x186485aac 0x18648596c 0x1864054fc 0x18642c7c4 0x18642d148 0x183195954 0x183193584 0x183193a14 0x1830c62e4 0x184a9f15c 0x188fda6fc 0x188fd5438 0x100070c3c 0x182c68600) libc++abi.dylib: terminating with uncaught exception of type NSException
我正在使用 xib 和以下代码：
import Foundation
import Parse
import UIKit
extension UIImageView {
public func imageFromUrl(_ urlString: String) {
if let url = URL(string: urlString) {
let request = URLRequest(url: url)
NSURLConnection.sendAsynchronousRequest(request, queue: OperationQueue.main()) {
(response: URLResponse?, data: Data?, error: NSError?) -> Void in
if let imageData = data as Data? {
self.image = UIImage(data: imageData)
}
}
}
}
}
class offersViewController: UIViewController, UITableViewDelegate {
@IBOutlet weak var tableView: UITableView!
@IBOutlet weak var offersView: UIView!
@IBOutlet weak var offerTitleLabel: UILabel!
@IBOutlet weak var smartCode: UILabel!
@IBOutlet weak var customerName: UILabel!
@IBAction func closeButton(sender: AnyObject) {
offersView.isHidden = true
}
var array: [String] = [String]()
var arrayImages: [String] = [String]()
override func viewDidLoad(){
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
self.array.removeAll(keepingCapacity: true)
self.arrayImages.removeAll(keepingCapacity: true)
let nib = UINib(nibName: "vwTblCell", bundle: nil)
tableView.register(nib, forCellReuseIdentifier: "cell")
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE"
let weekDay = dateFormatter.string(from: date)
print(weekDay)
tableView.isHidden = true
let query = PFQuery(className:"offers")
query.whereKey("day", equalTo:"\(weekDay)")
query.findObjectsInBackground {
(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
print("Successfully retrieved \(objects!.count) scores.")
// Do something with the found objects
if let objects = objects {
let birthdayOffer = "£25 free credit on your Birthday!"
let birthdayOfferImage = "birthday"
self.array.append(birthdayOffer as String)
print(self.array)
self.arrayImages.append(birthdayOfferImage as String)
print(self.arrayImages)
for object in objects {
let query = PFQuery(className:"offers")
query.getObjectInBackground(withId: "\(object.objectId!)"){
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let offertitle = gameScore!["offertitle"] as! String
let offerImage = gameScore!["imagename"] as! String
// Add birthday to array
self.array.append(offertitle as String)
print(self.array)
self.arrayImages.append(offerImage as String)
print(self.arrayImages)
}
self.tableView.reloadData()
self.tableView.isHidden = false
}
}
}
}
}
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return array.count
}
var cell : UITableViewCell?
func tableView(_tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell {
let cell: TblCell = self.tableView.dequeueReusableCell(withIdentifier: "cell",for: indexPath) as! TblCell
let url = URL(string: "https://checkmyweave.co.uk/\(arrayImages[(indexPath as NSIndexPath).row]).png")
cell.offerImage.sd_setImage(with: url)
cell.offerTitleLabel.text = self.array[(indexPath as NSIndexPath).row]
let defaults = UserDefaults.standard()
let userID = defaults.string(forKey: "userID")!
let query = PFQuery(className:"members")
query.getObjectInBackground(withId: "\(userID)") {
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let smartCode = gameScore!["smartcode"] as! String
let defaults = UserDefaults.standard()
let userName = defaults.string(forKey: "userName")!
self.smartCode.text = smartCode
self.customerName.text = userName
} else {
print(error)
}
}
return cell
}
func numberOfSectionsIntableView(_tableView: UITableView) -> Int {
return 1
}
private func tableView(_tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print((indexPath as NSIndexPath).row)
let date = Date()
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "EEEE"
let weekDay = dateFormatter.string(from: date)
offerTitleLabel.text = self.array[(indexPath as NSIndexPath).row]
offersView.isHidden = false
print(offerTitleLabel.text)
let query = PFQuery(className:"offers")
query.whereKey("offertitle", equalTo:"\(offerTitleLabel.text!)")
query.whereKey("day", equalTo:"\(weekDay)")
query.findObjectsInBackground {
(objects: [PFObject]?, error: NSError?) -> Void in
if error == nil {
// The find succeeded.
print("Successfully retrieved \(objects!.count) scores.")
// Do something with the found objects
if let objects = objects {
for object in objects {
let query = PFQuery(className:"offers")
query.getObjectInBackground(withId: "\(object.objectId!)"){
(gameScore: PFObject?, error: NSError?) -> Void in
if error == nil && gameScore != nil {
let offerdesc = gameScore!["offerDesc"] as! String
print(offerdesc)
}}}}}}
}
private func tableView(_tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
return 140
}
}
有谁知道为什么会出现这些错误？
你的行 func tableView(_tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell { 是错误的 - 你正在声明一个函数，它的第一个参数是 _tableView，这意味着它实际上并没有提供返回单元格所需的协议函数。
将其更改为 func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: IndexPath) -> UITableViewCell { - 即输入 space!
从 Swift 2 迁移到 Swift 3 时 all table 必须通过 [=12] 更改视图数据源和委托方法=]
将它们声明为私有并保留语法（没有任何下划线）
private func tableView(tableView : ...)或使用新语法（见下划线后的space字符）
func tableView(_ tableView : ...)
实际上，编译器应该显示有关该问题的警告以及如何修复它的建议。
尝试
func tableView(_ tableView: UITableView, cellForRowAt indexPath: NSIndexPath) -> UITableViewCell {...}
这是 Swift 3 - XCode 8
的正确解法func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "MyCell", for: indexPath)
return cell
}
class offersViewController: UIViewController, UITableViewDelegate,UITableViewDataSource { .... }
你好像忘了添加 "UITableViewDataSource"
SWIFT 3.0.1 和 xcode 8.2 Beta
我也遇到同样的错误 如下所述--
*** Assertion failure in
-[UITableView _configureCellForDisplay:forIndexPath:], /BuildRoot/Library/Caches/com.apple.xbs/Sources/UIKit/UIKit- 3599.6.1/UITableView.m:8035
2016-11-24 12:20:59.578026 JJS Connect[1479:587032] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView <UITableView: 0x1010c7400; frame = (0 277; 375 390); clipsToBounds = YES; autoresize = RM+BM; gestureRecognizers = <NSArray: 0x17005b9f0>; layer = <CALayer: 0x17022d680>; contentOffset: {0, 0}; contentSize: {375, 176}>) failed to obtain a cell from its dataSource (<JJS_Connect.FamilyProfileViewController: 0x100f41660>)'
*** First throw call stack:
我忘记在 Class 文件中声明协议 - UITableViewDataSource，UITableViewDelegate
在我声明 Table 视图的数据源和委托后，它正在工作。
下面提到了Correcway。
class FamilyProfileViewController: UIViewController,UITableViewDataSource,UITableViewDelegate {
variable declaration...
Function declaration...
}
如swift 3 tableview 数据源和委托方法已更改，因此您的方法不满足 tableview 要求，正确的方法是：
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
/*...*/
}
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
/*...*/
}