好久不寫簡書了，最近懶的不要不要的，訂的計劃錯過了所以的時間節(jié)點(diǎn)，不能再頹廢了，要振作，今天看到了一個小小的網(wǎng)頁還不錯，分享一下

How Do I Declare A Block in Objective-C?

As a local variable:
returnType (^blockName)(parameterTypes) = ^returnType(parameters) {...};

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

As a method parameter:

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

As an argument to a method call:
[someObject someMethodThatTakesABlock:^returnType (parameters) {...}];

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

This site is not intended to be an exhaustive list of all possible uses of blocks.If you find yourself needing syntax not listed here, it is likely that a typedef would make your code more readable.Unable to access this site due to the profanity in the URL? http://goshdarnblocksyntax.com is a more work-friendly mirror.

借此為努力的引子，把當(dāng)年發(fā)下的毒誓，跪著也要實現(xiàn)哈