Syntax

• As a variable:

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

• As a property:

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

• As a method parameter:

• (void)methodWithBlock:(returnType (^)(parameterTypes))blockName;

• As a typedef:

typedef returnType (^TypeName)(parameterTypes);

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