Xcode解决“Implicit declaration of function 'XXX' is invalid in C99” 警告或报错

1.Build Setting>>>C Language Dialect,然后选择GNU99[-std=gnu99] (选择看项目实际要求)。

Xcode解决“Implicit declaration of function 'XXX' is invalid in C99” 警告或报错

2.Build Setting>>>Architectures>>>Vaild Architectures,然后把arm64和armv7s去掉。

Xcode解决“Implicit declaration of function 'XXX' is invalid in C99” 警告或报错

3.Build Setting>>>Architectures>>>Build Active Architecture Only,把Debug的YES改为NO。

Xcode解决“Implicit declaration of function 'XXX' is invalid in C99” 警告或报错

4.Build Phases>>>Compile>>>找到对应的文件 添加-fno-objc-arc

Xcode解决“Implicit declaration of function 'XXX' is invalid in C99” 警告或报错