Detected Apple 'NO' macro definition, it can cause build conflicts. Please, include this header before any Apple headers.
![](https://img.haomeiwen.com/i4808506/3fa424ba70957063.png)
其中 一个警告 Detected Apple 'NO' macro definition, it can cause build conflicts. Please, include this header before any Apple headers.
意思是 让我们在引用这个头文件的时候应该放在所有Apple头文件之前
错误
![](https://img.haomeiwen.com/i4808506/e1d388bc206fda4e.png)
改成
![](https://img.haomeiwen.com/i4808506/afd6f70f06946993.png)
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