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24 年
typedef NSComparisonResult (^NSComparator)(id obj1, id obj2);
如果数组里面是字符串,在设置其block体的时候,你也可以利用苹果专门为NSString 提供的字符串比较方法,获得一个NSComparisonResult 类型,将其自动返回。 - (NSComparisonResult)compare:(NSString *)string options:(NSStringCompareOptions)mask ...
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