music4kid / cdd Goto Github PK

想复用旧项目的UI快速构建新app，但发现每个view都依赖了一个businessObject，导致每个view都不能单独拿出来。现在正在一个一个的修复编译错误。。。

运行成功后，点击demo直接崩溃，提示信息是约束问题

2016-02-22 13:24:55.435 CDDDemo[9981:560723] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '* +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:]: A constraint cannot be made between a leading/trailing attribute and a right/left attribute. Use leading/trailing for both or neither.'
*** First throw call stack:
(
0 CoreFoundation 0x0000000111856e65 exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001112cfdeb objc_exception_throw + 48
2 CoreFoundation 0x0000000111856d9d +[NSException raise:format:] + 205
3 Foundation 0x000000010f5418e2 +[NSLayoutConstraint constraintWithItem:attribute:relatedBy:toItem:attribute:multiplier:constant:] + 299
4 CDDDemo 0x000000010f3e53da -[MASViewConstraint install] + 954
5 CDDDemo 0x000000010f3e012f -[MASConstraintMaker install] + 1055
6 CDDDemo 0x000000010f3eb7ab -[UIView(MASAdditions) mas_makeConstraints:] + 155
7 CDDDemo 0x000000010f3ce953 -[UIView(MASShorthandAdditions) makeConstraints:] + 67
8 CDDDemo 0x000000010f3cf521 -[MessageCellText doMessageRendering] + 353
9 CDDDemo 0x000000010f3ca8ff -[CDDDemoView tableView:cellForRowAtIndexPath:] + 591
10 UIKit 0x000000010ff05e43 -[UITableView _createPreparedCellForGlobalRow:withIndexPath:willDisplay:] + 766
11 UIKit 0x000000010ff05f7b -[UITableView _createPreparedCellForGlobalRow:willDisplay:] + 74
12 UIKit 0x000000010fedaa39 -[UITableView _updateVisibleCellsNow:isRecursive:] + 2996
13 UIKit 0x000000010ff0f01c -[UITableView _performWithCachedTraitCollection:] + 92
14 UIKit 0x000000010fef5edc -[UITableView layoutSubviews] + 224
15 UIKit 0x000000010fe634a3 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 703
16 QuartzCore 0x0000000111f1e59a -[CALayer layoutSublayers] + 146
17 QuartzCore 0x0000000111f12e70 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 366
18 QuartzCore 0x0000000111f12cee _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
19 QuartzCore 0x0000000111f07475 _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 277
20 QuartzCore 0x0000000111f34c0a _ZN2CA11Transaction6commitEv + 486
21 QuartzCore 0x0000000111f3537c _ZN2CA11Transaction17observer_callbackEP19__CFRunLoopObservermPv + 92
22 CoreFoundation 0x0000000111782367 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION + 23
23 CoreFoundation 0x00000001117822d7 __CFRunLoopDoObservers + 391
24 CoreFoundation 0x0000000111777f2b __CFRunLoopRun + 1147
25 CoreFoundation 0x0000000111777828 CFRunLoopRunSpecific + 488
26 GraphicsServices 0x0000000114d3aad2 GSEventRunModal + 161
27 UIKit 0x000000010fdac610 UIApplicationMain + 171
28 CDDDemo 0x000000010f3d322f main + 111
29 libdyld.dylib 0x0000000112ead92d start + 1
30 ??? 0x0000000000000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

基本看完了里面代码，我觉得要比目前的MVVM要强很多，非常好的解决了层级深的view的跨多层事件传递，未来的项目将尝试一下！👍