Objective-C. Using blocks to reduce amount of code?

Question

For example, I need to implement an object moving. It is left, right, up and down methods.

Edited

The following code is incorrect but I hope it will explain the thing I need better:

@interface A : NSObject
...
@end

@implementation A
-(void)up
{
  [self moveTo:^{/*block1*/}];
}

-(void)down
{
    [self moveTo:^{/*block2*/}];
}

-(void)left
{
  [self moveTo:^{/*block3*/}];
}

-(void)right
{
  [self moveTo:^{/*block4*/}];
}

-(void)moveTo:(CodeBlock *)b {
  //actions before
 ...
  b
  //actions after
 ...
}
@end

Answer 1

The solution

For my example:

-(void)left
{
    [self moveTo:^(CGPoint p) {
        p.x--;
        return p;
    }];
}

-(void)moveTo:(CGPoint(^)(CGPoint))block
{
    CGPoint p = sprite.position;
    p = block(p);
    sprite.position = p;
}

Right, up and down methods are similar to left method. So don't told me that it is incorrect question or that the solution is impossible