嵌套的UIStackview问题，删除它们会导致崩溃。如何正确删除它们？

Question

试图在不使用UICollectionViews的情况下创建类似表格的电子表格，我决定使用嵌套的UIStackViews。因为我在UITableViewCell中使用它们，并以编程方式创建它们，所以我必须将它们从单元格中移除，否则，当重绘单元格时，新的视图将与旧的视图重叠。

但是，从父视图中删除它们时，它崩溃。如何正确删除嵌套的UIStackViews？

我的代码来创建嵌套UIStackViews：

 let table = UIStackView() 
     table.axis = .Vertical 
     table.spacing = 8 

     let json = JSON(data: jsonNew) 

     for i in 0..<json["Rows"].count{ 

      let horizontal = UIStackView() 
      horizontal.axis = .Horizontal 
      horizontal.spacing = 8 

      for j in 0..<json["Rows"][i]["Column"].count{ 

       let label = UILabel() 
       label.text = json["Rows"][i]["Column"][j].string! 
       label.lineBreakMode = .ByWordWrapping 
       label.numberOfLines = 0 
       label.font = label.font.fontWithSize(12) 
       horizontal.addArrangedSubview(label) 

      } 

      table.addArrangedSubview(horizontal) 

     } 

这是我如何删除单元中的所有观点：

for myview in view.subviews{ 
    myview.removeFromSuperview() 
} 

这是错误：

2016-05-17 11:37:58.745 TestProject[678:26088] _UIConstraintBasedLayoutLogUnsatisfiable is OFF 2016-05-17 11:38:16.563 TestProject[678:26088] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '{objective 0x12faebf00: <1100:16, 760:-6.10352e-05, 750:100, 251:563, 250:-512.5> + <760:-1>*0x12ddfbd00:UISV-text-width-disambiguation.negError{id: 13416} + <760:1>*0x12ddfbd00:UISV-text-width-disambiguation.posErrorMarker{id: 13415} + <760:-1>*0x12ddfbd50:UISV-text-width-disambiguation.negError{id: 13431} + <760:1>*0x12ddfbd50:UISV-text-width-disambiguation.posErrorMarker{id: 13430} + <750:1, 250:1>*0x12f80df30.negError{id: 13501} + <750:1, 250:1>*0x12f80f000.negError{id: 13499} + <250:1>*0x12f84df70:UISV-alignment.marker{id: 13578} + <250:4.6875>*0x12f85ee40:UISV-canvas-connection.marker{id: 13524} + <750:1, 250:1>*0x12f873b40.posErrorMarker{id: 13486} + <1100:1>*0x12f8a5730:UIView-Encapsulated-Layout-Width.marker{id: 13587} + <250:-1>*0x12f8b54e0:UISV-alignment.marker{id: 13557} + <250:-4.6875>*0x12f8d1d70:UISV-canvas-connection.marker{id: 13522} + <760:-1>*0x12f904f30:UISV-text-width-disambiguation.negError{id: 13412} + <760:1>*0x12f904f30:UISV-text-width-disambiguation.posErrorMarker{id: 13411} + <760:1>*0x12f904fa0:UISV-spacing.marker{id: 13413} + <251:-1>*0x12f98e950.marker{id: 12953} + <251:1>*0x12f9b0580.marker{id: 12949} + <760:1>*0x12f9cec00:UISV-canvas-connection.marker{id: 13406} + <250:4.6875>*0x12fa05f30:UISV-spacing.marker{id: 13535} + <999:1, 250:-5.6875>*0x12fa11cd0:UISV-fill-proportionally.negError{id: 13530} + <999:1, 250:5.6875>*0x12fa11cd0:UISV-fill-proportionally.posErrorMarker{id: 13529} + <1100:1>*0x12fa146d0.marker{id: 13000} + <750:1, 250:1>*0x12fa27ab0.posErrorMarker{id: 13492} + <1100:-1>*0x12fa3cc90.marker{id: 12998} + <750:1, 250:1>*0x12fa3cd80.negError{id: 13511} + <750:1, 250:1>*0x12fa3ea20.negError{id: 13513} + <250:1>*0x12fa47260:UISV-alignment.marker{id: 13572} + <750:1, 251:1>*0x12fa4e480.negError{id: 13020} + <1100:-1, 251:1>*0x12fa55880.marker{id: 14140} + <250:1>*0x12fa5bc10:UISV-alignment.marker{id: 13581} + <750:1, 250:1>*0x12fa6a5c0.negError{id: 13495} + <750:1, 250:1>*0x12fa711c0.negError{id: 13483} + <994:1, 250:-5.6875>*0x12fa78560:UISV-fill-proportionally.negError{id: 13547} + <994:1, 250:5.6875>*0x12fa78560:UISV-fill-proportionally.posErrorMarker{id: 13546} + <250:-1>*0x12fa7c820:UISV-alignment.marker{id: 13565} + <250:-1>*0x12fa7c870:UISV-alignment.marker{id: 13567} + <250:1>*0x12fa7c8c0:UISV-alignment.marker{id: 13569} + <250:1>*0x12fa7f990:UISV-alignment.marker{id: 13575} + <250:4.6875>*0x12fa7fc20:UISV-spacing.marker{id: 13527} + <250:4.6875>*0x12fa93c40:UISV-spacing.marker{id: 13531} + <750:1, 250:1>*0x12fa94dd0.negError{id: 13517} + <750:-1, 250:4.6875>*0x12fa980e0:UISV-hiding.marker{id: 13550} + <250:-1>*0x12fa98d50:UISV-alignment.marker{id: 13559} + <750:1, 250:1>*0x12fa990f0.negError{id: 13505} + <750:-1, 250:4.6875>*0x12faad3d0:UISV-hiding.marker{id: 13551} + <750:1, 251:1>*0x12fab93e0.negError{id: 13022} + <750:1, 250:1>*0x12fac5ee0.negError{id: 13481} + <250:7>*0x12facbf60:UISV-canvas-connection.marker{id: 13552} + <750:1, 250:1>*0x12fad6cb0.negError{id: 13489} + <250:4.6875>*0x12fadb570:UISV-spacing.marker{id: 13543} + <250:1>*0x12fae21d0:UISV-alignment.marker{id: 13584} + <250:-7>*0x12fae8940:UISV-canvas-connection.marker{id: 13554} + <750:1, 250:1>*0x12faec7c0.negError{id: 13519} + <760:-1>*0x12fc0f8a0:UISV-canvas-connection.marker{id: 13403} + <251:-1>*0x12fc1a8a0.marker{id: 12975} + <760:1>*0x12fc276f0:UISV-spacing.marker{id: 13409} + <760:1>*0x12fc54e40:UISV-spacing.marker{id: 13417} + <760:-1>*0x12fc54e90:UISV-text-width-disambiguation.negError{id: 13429} + <760:1>*0x12fc54e90:UISV-text-width-disambiguation.posErrorMarker{id: 13428} + <251:-1>*0x12fc6dd10.marker{id: 12972} + <1100:1>*0x12fc6e830.marker{id: 12969} + <760:-1>*0x12fc75b80:UISV-text-width-disambiguation.negError{id: 13424} + <760:1>*0x12fc75bf0:UISV-spacing.marker{id: 13425} + <760:-1>*0x12fc78190:UISV-text-width-disambiguation.negError{id: 13420} + <760:1>*0x12fc78190:UISV-text-width-disambiguation.posErrorMarker{id: 13419} + <760:1>*0x12fc78200:UISV-spacing.marker{id: 13421} + <251:-1>*0x12fc8fd20.marker{id: 12957} + <1100:1>*0x12fc95e90.marker{id: 12963} + <250:7>*0x12fc960b0.marker{id: 12955} + <250:4.6875>*0x12fd06e40:UISV-spacing.marker{id: 13533} + <750:1, 250:1>*0x12fd07210.negError{id: 13507} + <996:1, 250:-5.6875>*0x12fd1a3a0:UISV-fill-proportionally.negError{id: 13538} + <996:1, 250:5.6875>*0x12fd1a3a0:UISV-fill-proportionally.posErrorMarker{id: 13537} + <995:1, 250:-5.6875>*0x12fd1b3f0:UISV-fill-proportionally.negError{id: 13542} + <995:1, 250:5.6875>*0x12fd1b3f0:UISV-fill-proportionally.posErrorMarker{id: 13541} + <250:4.6875>*0x12fd1bd50:UISV-spacing.marker{id: 13539} + <993:1, 250:-5.6875>*0x12fd1c370:UISV-fill-proportionally.negError{id: 13549} + <993:1, 250:5.6875>*0x12fd1c370:UISV-fill-proportionally.posErrorMarker{id: 13548} + <250:-1>*0x12fd1e670:UISV-alignment.marker{id: 13561} + <250:-1>*0x12fd1e6c0:UISV-alignment.marker{id: 13563} + <750:0.00277778>*UILabel:0x12f884240'2016-04-11'.Width{id: 13061} + <750:0.00277778>*UILabel:0x12fa2f410'2031839'.Width{id: 13031} + <750:0.00277778>*UILabel:0x12fa2fd90'OTOTAY İÇ VE DIŞ PAZ.A.Ş.'.Width{id: 13037} + <750:0.00277778>*UILabel:0x12fa52010'TL'.Width{id: 13055} + <750:0.00277778>*UILabel:0x12fafa3d0'MAHMUT ÇETİNTÜRK'.Width{id: 13043} + <750:0.00277778>*UILabel:0x12fafa6a0'15000,00'.Width{id: 13049} + <760:0>*UIStackView:0x12fa081c0.Width{id: 13152} + <760:0, 750:-0.00277778>*UIStackView:0x12fb2b740.Width{id: 13067} + <760:0>*UIStackView:0x12fc44970.Width{id: 13322} + <760:0>*UIStackView:0x12fc65df0.Width{id: 13237}}: internal error. Setting empty vector for variable UILabel:0x12f905720'6955677'.Width{id: 13371}.' * First throw call stack: (0x18221ae38 0x18187ff80 0x18221ad80 0x182b52de0 0x182ccf4d4 0x182b4fcc8 0x182b53108 0x182b50d18 0x182b53928 0x182b585e4 0x182b4d010 0x182b4cd78 0x187464c80 0x187357368 0x187356c1c 0x182b4cd50 0x187356ac4 0x1876702c4 0x1873554e8 0x100143634 0x100148164 0x1876b2f40 0x1876b3120 0x1876b6a2c 0x1874a9500 0x1874a923c 0x1874a8ebc 0x187448aa0 0x1876a1a34 0x1876b7b74 0x1874487ac 0x1873580e4 0x184cfea28 0x184cf9634 0x184cf94f4 0x184cf8b24 0x184cf886c 0x184cf1dd8 0x1821d07b0 0x1821ce554 0x1821ce984 0x1820f8d10 0x1839e0088 0x1873c5f70 0x100107234 0x181c968b8) libc++abi.dylib: terminating with uncaught exception of type NSException

Answer 1

您需要从removeArrangedSubview删除堆栈视图，即

for myview in view.subviews{ 
    table.removeArrangedSubview(myview) 
    myview.removeFromSuperview() 
} 

UIStackView是一个非渲染UIView调用addArrangedSubview的时候，所以你不需要调用addSubview系统会自动添加子视图其观点heirachy。当删除排列的子视图时，必须调用stackView.removeArrangedSubview(view)和view.removeFromSuperview()