查看OC代码编译后的 .cpp文件

查看某个.m文件的 编译后的.cpp文件

xcrun -sdk iphoneos clang -arch arm64 -rewrite-objc xxx.m

如果.m文件中包含__weak 的代码就会报错

error: cannot create __weak reference because the current deployment target does not support weak references
    __attribute__((objc_ownership(weak))) NSString *name = @"xxx";
                   ^
1 error generated.

则需要如下改动, 指定ARC,和runtime的版本

xcrun -sdk iphoneos clang -arch arm64 -rewrite-objc  -fobjc-arc -fobjc-runtime=ios-8.0.0 xxx.m