自Xcode 7以来的Xcode控制台警告 [英] Xcode console warnings since Xcode 7

问题描述

如果我在xcode 7中启动我的应用(使用Swift 2的iOS 9)，则会在开始时收到以下警告:

if I start my app (ios 9 with Swift 2) in xcode 7, I get this warnings at beginning:

10月9日10:45:11 AppName [2866]:CGContextSaveGState:无效的上下文0x0.如果要查看回溯，请设置CG_CONTEXT_SHOW_BACKTRACE环境变量.10月9日10:45:11 AppName [2866]:CGContextTranslateCTM:无效的上下文0x0.如果要查看回溯，请设置CG_CONTEXT_SHOW_BACKTRACE环境变量.10月9日10:45:11 AppName [2866]:CGContextRestoreGState:无效的上下文0x0.如果要查看回溯，请设置CG_CONTEXT_SHOW_BACKTRACE环境变量.

Oct 9 10:45:11 AppName[2866] : CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable. Oct 9 10:45:11 AppName[2866] : CGContextTranslateCTM: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable. Oct 9 10:45:11 AppName[2866] : CGContextRestoreGState: invalid context 0x0. If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.

如何解决此警告?

推荐答案

似乎您正在设置视图的拐角半径(使用图层).

It seems like that you are setting the corner radius(working with layers) of a view.

解决方案1:

通过菜单设置环境变量:产品"->方案"->编辑方案".在运行"项中，找到参数"选项卡，您将在选项卡中看到环境变量"，添加 CG_CONTEXT_SHOW_BACKTRACE 并将其值设置为YES.

Set environmental variable via menu: Product-> Scheme->Edit Scheme. In "Run" item, locate "Arguments" tab, you'll see "Environmental Variables" in the tab, Add CG_CONTEXT_SHOW_BACKTRACE and set its value to YES.

解决方案2:-如果上述解决方案不适合您，请从Info.plist中删除UIViewControllerBasedStatusBarAppearance.

Solution 2:- If above solutions does not work for you, then remove the UIViewControllerBasedStatusBarAppearance from Info.plist.

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