How Do I Declare A Block in Objective-C?

时间：2015-08-19 19:55:44 阅读：205 评论：0 收藏：0 [点我收藏+]

As a local variable:

returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};

@property (nonatomic, copy) returnType (^blockName)(parameterTypes);

- (void)someMethodThatTakesABlock:(returnType (^)(parameterTypes))blockName;

[someObject someMethodThatTakesABlock:^returnType (parameters) {...}];

typedef returnType (^TypeName)(parameterTypes);
TypeName blockName = ^returnType(parameters) {...};

原文：http://www.cnblogs.com/iamjjh/p/4742808.html

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