2021-04-01 fuckingblocksyntax/co

Fools' Day , ie. Your day

if you don't know or forget the exactly right syntax of block.
here is your choice. do read it right now.

# 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 **parameter to a C function**:

`void SomeFunctionThatTakesABlock(returnType (^blockName)(parameterTypes));` 

## 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](http://goshdarnblocksyntax.com/)** is a more work-friendly mirror.

you can easily get the block syntax on the up.