文MRC/ARC通用的weakify和strongify

来源：互联网发布：碧然德滤水壶知乎编辑：程序博客网时间：2024/06/11 11:36

/*** 强弱引用转换，用于解决代码块（block）与强引用self之间的循环引用问题* 调用方式: `@weakify_self`实现弱引用转换，`@strongify_self`实现强引用转换** 示例：* @weakify_self* [obj block:^{* @strongify_self* self.property = something;* }];*/#ifndef    weakify_self#if __has_feature(objc_arc)#define weakify_self autoreleasepool{} __weak __typeof__(self) weakSelf = self;#else#define weakify_self autoreleasepool{} __block __typeof__(self) blockSelf = self;#endif#endif#ifndef    strongify_self#if __has_feature(objc_arc)#define strongify_self try{} @finally{} __typeof__(weakSelf) self = weakSelf;#else#define strongify_self try{} @finally{} __typeof__(blockSelf) self = blockSelf;#endif#endif/*** 强弱引用转换，用于解决代码块（block）与强引用对象之间的循环引用问题* 调用方式: `@weakify(object)`实现弱引用转换，`@strongify(object)`实现强引用转换** 示例：* @weakify(object)* [obj block:^{* @strongify(object)* strong_object = something;* }];*/#ifndef    weakify#if __has_feature(objc_arc)#define weakify(object) autoreleasepool{} __weak __typeof__(object) weak##_##object = object;#else#define weakify(object) autoreleasepool{} __block __typeof__(object) block##_##object = object;#endif#endif#ifndef    strongify#if __has_feature(objc_arc)#define strongify(object) try{} @finally{} __typeof__(object) strong##_##object = weak##_##object;#else#define strongify(object) try{} @finally{} __typeof__(object) strong##_##object = block##_##object;#endif#endif

参考链接：
https://github.com/PFei-He/PFTabView/blob/master/PFTabView/PFConfigure.h

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