Objective-C method parameter with ^ symbol

Question

One of the method signature in objective-c code

-(void)funcName: (const NSString *)name parameter: (void(^)(ClassName *input)) obj

The class definition header file is

@interface ClassName : NSObject
@property NSObject *data;
@end

Now how to prepare and pass the second paramater?

Answer 1

you can pass a block as a parameter for instance like:

option 1.

[... funcName:@"" parameter:^(ClassName * input) {
    NSLog(@"I'm inside the block!");
}];

option 2.

void(^myBlock)(ClassName *) = ^(ClassName * input) {
    NSLog(@"I'm inside the block!");
};

[... funcName:@"" parameter:myBlock];

both options can work, you can use whichever makes more sense to you.