weakify 和 strongify
作者:
犯色戒的和尚 | 来源:发表于
2019-05-20 01:43 被阅读0次#ifndef weakify
#if __has_feature(objc_arc)
#define weakify( x ) \\
_Pragma("clang diagnostic push") \\
_Pragma("clang diagnostic ignored \\"-Wshadow\\"") \\
autoreleasepool{} __weak __typeof__(x) __weak_##x##__ = x; \\
_Pragma("clang diagnostic pop")
#else
#define weakify( x ) \\
_Pragma("clang diagnostic push") \\
_Pragma("clang diagnostic ignored \\"-Wshadow\\"") \\
autoreleasepool{} __block __typeof__(x) __block_##x##__ = x; \\
_Pragma("clang diagnostic pop")
#endif
#endif
#ifndef strongify
#if __has_feature(objc_arc)
#define strongify( x ) \\
_Pragma("clang diagnostic push") \\
_Pragma("clang diagnostic ignored \\"-Wshadow\\"") \\
try{} @finally{} __typeof__(x) x = __weak_##x##__; \\
_Pragma("clang diagnostic pop")
#else
#define strongify( x ) \\
_Pragma("clang diagnostic push") \\
_Pragma("clang diagnostic ignored \\"-Wshadow\\"") \\
try{} @finally{} __typeof__(x) x = __block_##x##__; \\
_Pragma("clang diagnostic pop")
#endif
#endif
本文标题：weakify 和 strongify
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