覆盖在 showcaseTemplate 中不起作用

Question

我只是修改 TVMLCatalog 示例附带的 showcaseTemplate，方法是修改图像 src 并在查找中添加叠加层：

<carousel>  
     <section>  
          <lockup>  
               <img src="${this.BASEURL}resources/images/templates/gft.jpg" width="500" height="600" />  
               <overlay>  
                    <title>Hello, this is title</title>  
               </overlay>  
          </lockup>  
     </section>  
</carousel>

但是叠加层没有显示

这是 XCODE 日志显示的内容：

2015-12-07 11:25:47.851 TVMLCatalog[3953:3684153] #T:[Main] #Notice #SYSTEM : Template element: <IKViewElement: 0x7fcee0781f20>   
2015-12-07 11:25:47.858 TVMLCatalog[3953:3684153] #T:[Main] #Notice #SYSTEM : Template controller: <_TVLoadingViewController: 0x7fcee04ba960>   
2015-12-07 11:25:47.864 TVMLCatalog[3953:3684153] #T:[Main] #Notice #SYSTEM : Template element: <IKViewElement: 0x7fcee2176a50>   
2015-12-07 11:25:47.865 TVMLCatalog[3953:3684153] #T:[Main] #Notice #SYSTEM : Template controller: <_TVShowcaseTemplateController: 0x7fcee0799c90>   
Dec  7 11:25:47  TVMLCatalog[3953] <Error>: ImageIO: CreateMetadataFromXMPBufferInternal  Threw error #203 (Duplicate property or field node)  
Dec  7 11:25:47  TVMLCatalog[3953] <Error>: ImageIO: CreateMetadataFromXMPBufferInternal  Threw error #203 (Duplicate property or field node)  
2015-12-07 11:25:48.996 TVMLCatalog[3953:3684153] 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.   
  (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints)   
(  
    "<NSAutoresizingMaskLayoutConstraint:0x7fcee0564910 h=--& v=--& V:[_TVStackingPosterView:0x7fcee051a1e0(46)]>",  
    "<NSLayoutConstraint:0x7fcee0554000 V:[TVLabel:0x7fcee0561020'Image1'(62)]>",  
    "<NSLayoutConstraint:0x7fcee0564250 V:|-(0)-[TVLabel:0x7fcee0561020'Image1']   (Names: '|':_TVStackingPosterView:0x7fcee051a1e0 )>",  
    "<NSLayoutConstraint:0x7fcee0564720 TVLabel:0x7fcee0561020'Image1'.bottom == _TVStackingPosterView:0x7fcee051a1e0.bottom>"  
)  
Will attempt to recover by breaking constraint   
<NSLayoutConstraint:0x7fcee0564720 TVLabel:0x7fcee0561020'Image1'.bottom == _TVStackingPosterView:0x7fcee051a1e0.bottom>  
Make a symbolic breakpoint at UIViewAlertForUnsatisfiableConstraints to catch this in the debugger.  
The methods in the UIConstraintBasedLayoutDebugging category on UIView listed in <UIKit/UIView.h> may also be helpful.

请注意，我以前从未使用过 Swift 或 Objective-C。所以我完全迷失在这里。非常感谢任何帮助

Answer 1

经过一些研究，我发现这是一个已知问题：

Apple 开发者论坛中的更多信息：

已向 Apple 提交了多个错误报告。

覆盖在 showcaseTemplate 中不起作用

Overlay not working in showcaseTemplate

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