我有一个自定义视图，其 init 方法如下。这曾经在 Xcode 9.1 和 swift 4 中正常工作。今天我更新到 Xcode 9.3 并将项目基础设置为 swift 4.1，它开始在这个 init 方法中崩溃。
init(frame: CGRect, detailDic: [[String:AnyObject]], parentView:UIView)
{
super.init(frame:frame)
self.view = Utilities.loadViewFromNib(“MyScoreView", atIndex: 0, aClass: type(of: self),parent:self) as! UIView
self.view.frame = frame
self.view.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
self.view.isHidden = true
finalScoreTable.register(UINib(nibName: “MyScoreTableViewCell", bundle: nil), forCellReuseIdentifier: "scoreCell")
addSubview(self.view)
parentView.addSubview(self) //Crashes here
finalScoreTable.tableFooterView = UIView()
}
崩溃堆栈跟踪
*** First throw call stack:
(
0 CoreFoundation 0x0000000104a471e6 __exceptionPreprocess + 294
1 libobjc.A.dylib 0x0000000103651031 objc_exception_throw + 48
2 CoreFoundation 0x0000000104ac8784 -[NSObject(NSObject) doesNotRecognizeSelector:] + 132
3 UIKit 0x00000001066ea73b -[UIResponder doesNotRecognizeSelector:] + 295
4 CoreFoundation 0x00000001049c9898 ___forwarding___ + 1432
5 CoreFoundation 0x00000001049c9278 _CF_forwarding_prep_0 + 120
6 UIKit 0x0000000106626851 -[UITableView _numberOfRowsInSection:] + 62
7 UIKit 0x00000001068d5e5b -[UISectionRowData refreshWithSection:tableView:tableViewRowData:] + 2631
8 UIKit 0x00000001068dc219 -[UITableViewRowData rectForFooterInSection:heightCanBeGuessed:] + 487
9 UIKit 0x00000001068dc37f -[UITableViewRowData heightForTable] + 61
10 UIKit 0x00000001065d684e -[UITableView _updateContentSize] + 365
11 UIKit 0x0000000106605a8f -[UITableView _rebuildGeometry] + 66
12 UIKit 0x0000000106603583 -[UITableView didMoveToWindow] + 145
13 UIKit 0x0000000106581f55 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 1718
14 UIKit 0x000000010659b73e -[UIScrollView _didMoveFromWindow:toWindow:] + 84
15 UIKit 0x0000000106581b98 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 761
16 UIKit 0x0000000106581b98 -[UIView(Internal) _didMoveFromWindow:toWindow:] + 761
17 UIKit 0x0000000106574114 __45-[UIView(Hierarchy) _postMovedFromSuperview:]_block_invoke + 151
18 UIKit 0x0000000106573fea -[UIView(Hierarchy) _postMovedFromSuperview:] + 808
19 UIKit 0x0000000106584a2b -[UIView(Internal) _addSubview:positioned:relativeTo:] + 1940
20 MySampleApp 0x0000000102649ec7 _T017MySampleApp14MyScoreViewCACSC6CGRectV5frame_Says10DictionaryVySSyXlGG13playerDetailsSo6UIViewC06parentF0tcfc + 4343
21 MySampleApp 0x0000000102648dc7 _T017MySampleApp14MyScoreViewCACSC6CGRectV5frame_Says10DictionaryVySSyXlGG13playerDetailsSo6UIViewC06parentF0tcfC + 87
22 MySampleApp 0x00000001026371b8 _T017MySampleApp22MainGameViewControllerC14showScoreAlertySo5TimerCF + 2200
23 MySampleApp 0x000000010263784c _T017MySampleApp22MainGameViewControllerC14showScoreAlertySo5TimerCFTo + 60
24 Foundation 0x00000001030bb4dd __NSFireTimer + 83
25 CoreFoundation 0x00000001049d6e64 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
26 CoreFoundation 0x00000001049d6a52 __CFRunLoopDoTimer + 1026
27 CoreFoundation 0x00000001049d660a __CFRunLoopDoTimers + 266
28 CoreFoundation 0x00000001049cde4c __CFRunLoopRun + 2252
29 CoreFoundation 0x00000001049cd30b CFRunLoopRunSpecific + 635
30 GraphicsServices 0x000000010c816a73 GSEventRunModal + 62
31 UIKit 0x00000001064bc0b7 UIApplicationMain + 159
32 MySampleApp 0x00000001026580e7 main + 55
33 libdyld.dylib 0x00000001093d4955 start + 1
34 ??? 0x0000000000000001 0x0 + 1
)