快速显示图像数组的表格视图

Question

我有一个表格视图，它显示了一系列预加载在数组中的图像，但是当我运行代码时，它会因为这个错误而崩溃“

   2019-08-22 12:19:10.756047+0200 Wee'd like to help[44388:5089505] 
   libMobileGestalt MobileGestalt.c:890: MGIsDeviceOneOfType is not 
   supported on this platform.
2019-08-22 12:19:10.884482+0200 Wee'd like to help[44388:5089505] [LayoutConstraints] Unable to simultaneously satisfy constraints.
    Probably at least one of the constraints in the following list is one you don't want. 
    Try this: 
        (1) look at each constraint and try to figure out which you don't expect; 
        (2) find the code that added the unwanted constraint or constraints and fix it. 
(
    "<NSLayoutConstraint:0x6000038cb890 UILayoutGuide:0x6000022d3720'UIViewSafeAreaLayoutGuide'.trailing == UIStackView:0x7fdffdc24870.trailing + 1   (active)>",
    "<NSLayoutConstraint:0x6000038f7ac0 H:[UIStackView:0x7fdffdc24870]-(16)-|   (active, names: '|':UIView:0x7fdffdc233d0 )>",
    "<NSLayoutConstraint:0x6000038f75c0 'UIViewSafeAreaLayoutGuide-right' H:[UILayoutGuide:0x6000022d3720'UIViewSafeAreaLayoutGuide']-(0)-|(LTR)   (active, names: '|':UIView:0x7fdffdc233d0 )>"
)

Will attempt to recover by breaking constraint 
<NSLayoutConstraint:0x6000038cb890 UILayoutGuide:0x6000022d3720'UIViewSafeAreaLayoutGuide'.trailing == UIStackView:0x7fdffdc24870.trailing + 1   (active)>

Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKitCore/UIView.h> may also be helpful.
2019-08-22 12:19:12.780647+0200 Wee'd like to help[44388:5089505] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '-[UITableViewController loadView] instantiated view controller with identifier "UIViewController-lwe-wj-C4h" from storyboard "Main", but didn't get a UITableView.'
*** First throw call stack:
(
    0   CoreFoundation                      0x000000010b04f1bb __exceptionPreprocess + 331
    1   libobjc.A.dylib                     0x000000010934a735 objc_exception_throw + 48
    2   CoreFoundation                      0x000000010b04f015 +[NSException raise:format:] + 197
    3   UIKitCore                           0x0000000112b969dc -[UITableViewController loadView] + 621
    4   UIKitCore                           0x0000000112ba60ee -[UIViewController loadViewIfRequired] + 175
    5   UIKitCore                           0x0000000112ba6940 -[UIViewController view] + 27
    6   UIKitCore                           0x0000000112af0a9b -[UINavigationController _startCustomTransition:] + 931
    7   UIKitCore                           0x0000000112b073f0 -[UINavigationController _startDeferredTransitionIfNeeded:] + 741
    8   UIKitCore                           0x0000000112b087e0 -[UINavigationController __viewWillLayoutSubviews] + 150
    9   UIKitCore                           0x0000000112ae8600 -[UILayoutContainerView layoutSubviews] + 217
    10  UIKitCore                           0x00000001136af795 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 1441
    11  QuartzCore                          0x0000000109d9fb19 -[CALayer layoutSublayers] + 175
    12  QuartzCore                          0x0000000109da49d3 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 395
    13  QuartzCore                          0x0000000109d1d7ca _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 342
    14  QuartzCore                          0x0000000109d5497e _ZN2CA11Transaction6commitEv + 576
    15  QuartzCore                          0x0000000109d556fa _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 76
    16  CoreFoundation                      0x000000010afb3c27 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
    17  CoreFoundation                      0x000000010afae0be __CFRunLoopDoObservers + 430
    18  CoreFoundation                      0x000000010afae751 __CFRunLoopRun + 1537
    19  CoreFoundation                      0x000000010afade11 CFRunLoopRunSpecific + 625
    20  GraphicsServices                    0x000000010f5d51dd GSEventRunModal + 62
    21  UIKitCore                           0x00000001131c581d UIApplicationMain + 140
    22  Wee'd like to help                  0x00000001089f0bf7 main + 71
    23  libdyld.dylib                       0x000000010c4e8575 start + 1
    24  ???                                 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException"

我已经尝试重置和清除约束

这是我的 tableViewController 代码

class StrainTableViewController: UITableViewController {
    var diseasePics = [UIImage()]
    override func viewDidLoad() {
        super.viewDidLoad()
        loadPics()

        // Uncomment the following line to preserve selection between presentations
        // self.clearsSelectionOnViewWillAppear = false

        // Uncomment the following line to display an Edit button in the navigation bar for this view controller.
        // self.navigationItem.rightBarButtonItem = self.editButtonItem
    }

    // MARK: - Table view data source

    override func numberOfSections(in tableView: UITableView) -> Int {
        // #warning Incomplete implementation, return the number of sections
        return 1
    }

    override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        // #warning Incomplete implementation, return the number of rows
        return diseasePics.count
    }

    func loadPics(){
        let anxietyPic = UIImage(named: "Anxiety")
        let depressionPic = UIImage(named: "Depression")
        let arthritisPic = UIImage(named: "Arthritis")
        let crampsPic = UIImage(named: "Cramps")
        let fatiguePic = UIImage(named: "Fatigue")
        let headachePic = UIImage(named: "Headache")

        diseasePics = [anxietyPic,depressionPic, arthritisPic, crampsPic, fatiguePic,headachePic] as! [UIImage] 
    }

    override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCell(withIdentifier: "StrainCell", for: indexPath) as! StrainTableViewCell

        let image = diseasePics[indexPath.row]
        cell.diseaseImage.image = image
        return cell
    }
}

我真的不认为问题是约束，我认为这里有问题

Answer 1

这个错误是由于你的 UITableViewController 不包含 UITableView 检查 您的故事板并在您的 UITableViewController 中添加 TableView。

并且您还需要在调用 loadPics() 函数之前在 viewDidLoad() 方法中注册您的单元格，例如：

tableView.register(UINib(nibName: "StrainTableViewCell", bundle: nil), forCellReuseIdentifier: "StrainCell")

Answer 2

原来问题出在 loadPics 方法上。我没有使用任何方法初始化图片，效果很好