Block

2017-02-24  本文已影响9人  赤洱

转自:http://goshdarnblocksyntax.com/
As a local variable:
returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};
As a property:

@property (nonatomic, copy, nullability) returnType (^blockName)(parameterTypes);
As a method parameter:

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

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

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