ios - ASCollectionNode 显示VerticalScrollIndicator 是点工作

Question

我使用 AsyncDisplayKit ASCollectionView，但是不显示VerticalScrollIndicator = NO，不行？谁能告诉我，谢谢

 self.collectionNode = [[ASCollectionNode alloc] initWithCollectionViewLayout:layout];
    self.collectionNode.dataSource = self;
    self.collectionNode.delegate = self;
    self.collectionNode.view.showsVerticalScrollIndicator = NO;
    // this can't working  

调试:

2018-03-12 10:04:37.255867+0800 LiveTeach-iPhone[29773:17126525] [Node] View controller <LTProcessViewController: 0x7f99e365ff90> will appear
2018-03-12 10:04:37.270323+0800 LiveTeach-iPhone[29773:17126525] [Collection] performBatchUpdates <ASTableNode: 0x7f99e3681410> {  }
2018-03-12 10:04:37.270649+0800 LiveTeach-iPhone[29773:17126525] [Collection] <ASTableView: 0x7f99e4083c00> Skipped update because load hasn't happened.
2018-03-12 10:04:37.272763+0800 LiveTeach-iPhone[29773:17126525] [Collection] Initial reloadData <ASTableNode: 0x7f99e3681410>
2018-03-12 10:04:37.282165+0800 LiveTeach-iPhone[29773:17126525] [Collection] New content: { itemCounts = [ <S0: 40> ] }
2018-03-12 10:04:37.296018+0800 LiveTeach-iPhone[29773:17126665] *** Assertion failure in -[ASCollectionNode view], /Users/vvv/Desktop/liveTeach/vvv-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296049+0800 LiveTeach-iPhone[29773:17126681] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296076+0800 LiveTeach-iPhone[29773:17127565] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296095+0800 LiveTeach-iPhone[29773:17126669] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296113+0800 LiveTeach-iPhone[29773:17126680] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296131+0800 LiveTeach-iPhone[29773:17127564] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296153+0800 LiveTeach-iPhone[29773:17127563] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.296174+0800 LiveTeach-iPhone[29773:17127562] *** Assertion failure in -[ASCollectionNode view], /Users/xxx/Desktop/liveTeach/xxx-iphone/Pods/Texture/Source/ASDisplayNode.mm:679
2018-03-12 10:04:37.305469+0800 LiveTeach-iPhone[29773:17126525] [Node] Propagating new traits for <LTProcessViewController: 0x7f99e365ff90>: { userInterfaceIdiom = Phone; containerSize = {414, 687}; horizontalSizeClass = Compact; verticalSizeClass = Regular; forceTouchCapability = Available }
2018-03-12 10:04:37.305984+0800 LiveTeach-iPhone[29773:17126525] [Node] Propagating new traits for <LTProcessViewController: 0x7f99e365ff90>: { userInterfaceIdiom = Phone; containerSize = {414, 687}; horizontalSizeClass = Compact; verticalSizeClass = Regular; forceTouchCapability = Available }
2018-03-12 10:04:37.353424+0800 LiveTeach-iPhone[29773:17127563] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'This method must be called on the main thread'
*** First throw call stack:
(
0   CoreFoundation                      0x000000010a7e112b __exceptionPreprocess + 171
1   libobjc.A.dylib                     0x000000010f1e5f41 objc_exception_throw + 48
2   CoreFoundation                      0x000000010a7e62f2 +[NSException raise:format:arguments:] + 98
3   Foundation                          0x000000010b637d69 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] + 193
4   LiveTeach-iPhone                    0x000000010931bb51 -[ASDisplayNode view] + 1009
5   LiveTeach-iPhone                    0x000000010929ba56 -[ASCollectionNode view] + 54
6   LiveTeach-iPhone                    0x00000001090c14c6 -[LTProcessCellView initWithModel:] + 2758
7   LiveTeach-iPhone                    0x00000001090a9807 __64-[LTProcessViewController tableNode:nodeBlockForRowAtIndexPath:]_block_invoke + 71
8   LiveTeach-iPhone                    0x0000000109414748 __51-[ASTableView dataController:nodeBlockAtIndexPath:]_block_invoke_2 + 104
9   LiveTeach-iPhone                    0x000000010928599f -[ASCollectionElement node] + 127
10  LiveTeach-iPhone                    0x00000001092d360a __58-[ASDataController _allocateNodesFromElements:completion:]_block_invoke + 154
11  LiveTeach-iPhone                    0x00000001092e55ad __ASDispatchApply_block_invoke + 93
12  libdispatch.dylib                   0x0000000110ea12f7 _dispatch_call_block_and_release + 12
13  libdispatch.dylib                   0x0000000110ea233d _dispatch_client_callout + 8
14  libdispatch.dylib                   0x0000000110ea7406 _dispatch_queue_override_invoke + 1895
15  libdispatch.dylib                   0x0000000110eae102 _dispatch_root_queue_drain + 772
16  libdispatch.dylib                   0x0000000110eadda0 _dispatch_worker_thread3 + 132
17  libsystem_pthread.dylib             0x000000011136d1ca _pthread_wqthread + 1387
18  libsystem_pthread.dylib             0x000000011136cc4d start_wqthread + 13
)    

这是调试信息，但我无法修复它。谁能帮助我，非常感谢

Answer 1

ASDisplayNode是Async类，你不能直接调用view属性，你必须等待它被加载。 ASDisplayNode 有一个通过子类“-(void)didLoad;”覆盖它的方法或直接在 Node 中加载逻辑 block (如您的情况):

[self.collectionNode onDidLoad:^(__kindof ASCollectionNode *node) {
  node.view.showsVerticalScrollIndicator = NO;
}];

并且didLoad必须在MainThread上调用，不记得了，但我认为didLoad默认在Main线程上调用，需要检查它。