Block 声明语法 简记

本地变量(Local Variable)

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

属性(Property)

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

方法参数(method parameter)

• (void)someMethodThatTakesABlock:(returnType (^nullability)(parameterTypes))blockName;

方法调用的时候的参数

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

重定义(typedef)

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

##参考资料

http://fuckingblocksyntax.com/