I liked Ahmed Khalaf's answer, but it occurred to me that you may as well just write out a few C functions... the key advantage being that it'll be easier to track down errors in the event that you're using the wrong type.
Having said that, I wrote a .h file with these function declarations:
CGRect CGRectSetWidth(CGRect rect, CGFloat width);
CGRect CGRectSetHeight(CGRect rect, CGFloat height);
CGRect CGRectSetSize(CGRect rect, CGSize size);
CGRect CGRectSetX(CGRect rect, CGFloat x);
CGRect CGRectSetY(CGRect rect, CGFloat y);
CGRect CGRectSetOrigin(CGRect rect, CGPoint origin);
And a corresponding .m file with these function implementations:
CGRect CGRectSetWidth(CGRect rect, CGFloat width) {
return CGRectMake(rect.origin.x, rect.origin.y, width, rect.size.height);
}
CGRect CGRectSetHeight(CGRect rect, CGFloat height) {
return CGRectMake(rect.origin.x, rect.origin.y, rect.size.width, height);
}
CGRect CGRectSetSize(CGRect rect, CGSize size) {
return CGRectMake(rect.origin.x, rect.origin.y, size.width, size.height);
}
CGRect CGRectSetX(CGRect rect, CGFloat x) {
return CGRectMake(x, rect.origin.y, rect.size.width, rect.size.height);
}
CGRect CGRectSetY(CGRect rect, CGFloat y) {
return CGRectMake(rect.origin.x, y, rect.size.width, rect.size.height);
}
CGRect CGRectSetOrigin(CGRect rect, CGPoint origin) {
return CGRectMake(origin.x, origin.y, rect.size.width, rect.size.height);
}
So, now, to do what you want, you can just do:
self.frame = CGRectSetWidth(self.frame, 50);
Get even Fancier (update I made a year later)
This has a redundant self.frame in it, though. To fix that, you could add a category on UIView with methods that look like this:
- (void) setFrameWidth:(CGFloat)width {
self.frame = CGRectSetWidth(self.frame, width); // You could also use a full CGRectMake() function here, if you'd rather.
}
And now you can just type in:
[self setFrameWidth:50];
Or, even better:
self.frameWidth = 50;
And just so you can do something like this:
self.frameWidth = otherView.frameWidth; // as opposed to self.frameWidth = otherView.frame.size.width;
You'll need to also have this in your category:
- (CGFloat) frameWidth {
return self.frame.size.width;
}
Enjoy.
.offsetByfunction https://mcmap.net/q/271859/-simple-way-to-change-the-position-of-uiview – Lavone