CODEWITHSUNDEEP
iphoneobjective-cipad
Josh Kahane
Josh Kahane

Reputation: 17169

Adapt Method for Multiple Object Types?

I have this method which lets me translate the position of an object, animating its move in my iPhone app:

-(void)translatePositionForLabel:(UILabel *)label toFrame:(CGRect)newFrame
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    label.frame = newFrame;
    [UIView commitAnimations];
}

You can see this works for UILabels, but without having a duplicate of this method (just swapping the object for say UIButton) is there anyway I can adapt this method so I can pass any object with a frame? Rather than needing an individual method for each object type.

Upvotes: 1

Views: 55

Answers (2)

Hejazi
Hejazi

Reputation: 17015

You can also make a category for UIView with methods for moving with animation:

UIView+Additions.h

@interface UIView (Additions)

- (void)setFrame:(CGRect)frame animated:(BOOL)animated;

- (void)translateToPoint:(CGPoint)point animated:(BOOL)animated;

@end

UIView+Additions.m

@implementation UIView (Additions)

- (void)setFrame:(CGRect)newFrame animated:(BOOL)animated {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];
    self.frame = newFrame;
    [UIView commitAnimations];
}

- (void)translateToPoint:(CGPoint)point animated:(BOOL)animated {
    CGRect newFrame = self.frame;
    newFrame.origin = point;
    [self setFrame:newFrame animated:animated];
}

@end

Now you can just call [button setFrame:newFrame animated:YES] or [label setFrame:newFrame animated:YES].

Upvotes: 1

trojanfoe
trojanfoe

Reputation: 122401

Both UILabel and UIButton have a common ancestor in UIView; try passing that in place of label (you only appear to modify the label's frame property, which is defined in UIView).

Upvotes: 2

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