Error>: CGContextDrawImage: invalid context 0x0. If you want to see the backtrace, please set CG_CON
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这个错误是说你控件的上下文错误
举个例子：
如果你先添加了一个laebl1,适配完毕后再添加一个label2,label2的约束是相对于label而言的，那么因为某些原因，label1没有添加上，那么label2还是以label1为约束条件的话，那么个就会报这个错误了
下面请看效果图
0 0
- Error>: CGContextDrawImage: invalid context 0x0. If you want to see the backtrace, please set CG_CON
- <Error>: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG_C
- ios错误<Error>: CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set
- xcode 7 错误：CGContextSaveGState: invalid context 0x0. If you want to see the backtrace, please set CG
- If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variable.
- iOS报错 - If you want to see the backtrace, please set CG_CONTEXT_SHOW_BACKTRACE environmental variabl
- To see the people you want to see
- <Error>: CGContextDrawImage: invalid context 0x0o类似此种报错
- <Error>: CGContextSetFont: invalid context 0x0
- <Error>: CGBitmapContextCreateImage: invalid context 0x0. 解决方案
- invalid context 0x0
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- Spyder is already running. If you want to open a new instance, please pass to it the --new-instance
- CGContextSaveGState: invalid context 0x0. This is a serious error.
- 《iOS总结》 <Error>: CGContextSaveGState: invalid context 0x0.
- If you want to happiness
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