some block examples

gistfile1.m

+ (void)iterateFromOneTo:(int)limit withBlock:(int (^)(int))block;

- (void) calculateLatestSpieltagWithCompletion:(void (^)(void))completion;


//
// Blocks as properties
//
typedef void(^MyCustomBlock)(void);

@interface MyClass : NSObject {

}
@property (nonatomic, copy) MyCustomBlock customBlock;
@end

@implementation MyClass
@synthesize customBlock;

- (void) dealloc {
  [customBlock release];
  [super dealloc];
}

@end

MyClass * c = [[MyClass alloc] init];
[c setCustomBlock:^{
  NSLog(@"hello.....");
}];

[c customBlock]();  //or c.customBlock()
[c release];

/*
Blocks as variables (can be used as properties)
*/
void (^instagramBlock)(void) = ^{
        
  [self shareOnInstagram];
};