CODEWITHSUNDEEP
objective-cobjective-c-blocksstatic-variables
user1244109
user1244109

Reputation: 2186

Static block variable in Objective-C

Is it possible to have a static variable of a "block type"?

I have a class that only does stuff in static methods. Upon execution of those methods i'm calling statusChangedBlock. Just for that i create a shared instance of the class, and use its single block property. I wonder if it's possible to have a static block variable; so i wouldn't have to create a instance with a single property, just for notifying that my status changed.

I know there is an option of NSNotification, but i don't like using it, with some rare exceptions.

...this question somehow sounds stupid, i can't tell why. I hope someone points that out.

Upvotes: 12

Views: 5223

Answers (2)

Holly
Holly

Reputation: 5290

A block type variable is actually a pointer, similar to an object. You can have a static block variable, but you must assign its value at runtime, perhaps using a dispatch_once block.

Upvotes: 0

Bryan Chen
Bryan Chen

Reputation: 46598

to declare a static variable of block type

typedef ReturnType (^MyBlockType)(ArgumentType, ArgumentType2);
static MyBlockType myblock;
static MyBlockType myblock2;

or

static ReturnType (^myblock)(ArgumentType, ArgumentType2);

Upvotes: 11

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