[ios] Simple way to change the position of UIView?

I change the position of a UIView with following codes without changing size of the view.

CGRect f = aView.frame;
f.origin.x = 100; // new x
f.origin.y = 200; // new y
aView.frame = f;

Is there more simple way to change only the view position?

In my work we not use macros. So the solution provide by @TomSwift inspired to me. I see the implementation for CGRectMake and create the same CGRectSetPos but without macros.

CG_INLINE CGRect
CGRectSetPos(CGRect frame, CGFloat x, CGFloat y)
{
  CGRect rect;
  rect.origin.x = x; rect.origin.y = y;
  rect.size.width = frame.size.width; rect.size.height = frame.size.height;
  return rect;
}

To use I only put frame, X and Y

viewcontroller.view.frame = CGRectSetPos(viewcontroller.view.frame, 100, 100);

Work for me ^_^

swift

view.frame = view.frame.offsetBy(dx: offsetX, dy: offsetY)

Other way:

CGPoint position = CGPointMake(100,30);
[self setFrame:(CGRect){
      .origin = position,
      .size = self.frame.size
}];

This i save size parameters and change origin only.

CGRectOffset has since been replaced with the instance method offsetBy.

https://developer.apple.com/reference/coregraphics/cgrect/1454841-offsetby

For example, what used to be

aView.frame = CGRectOffset(aView.frame, 10, 10)

would now be

aView.frame = aView.frame.offsetBy(dx: CGFloat(10), dy: CGFloat(10))

UIView's also have a center property. If you just want to move the position rather than resize, you can just change that - eg:

aView.center = CGPointMake(50, 200);

Otherwise you would do it the way you posted.

The solution in the selected answer does not work in case of using Autolayout. If you are using Autolayout for views take a look at this answer.

aView.frame = CGRectMake(100, 200, aView.frame.size.width, aView.frame.size.height);

I found a similar approach (it uses a category as well) with gcamp's answer that helped me greatly here. In your case is as simple as this:

aView.topLeft = CGPointMake(100, 200);

but if you want for example to centre horizontal and to the left with another view you can simply:

aView.topLeft = anotherView.middleLeft;

Here is the Swift 3 answer for anyone looking since Swift 3 does not accept "Make".

aView.center = CGPoint(x: 200, Y: 200)

If anybody needs light Swift extension to change UIView margins easily - you can use this

view.top = 16
view.right = self.width
view.bottom = self.height
self.height = view.bottom

@TomSwift Swift 3 answer

aView.center = CGPoint(x: 150, y: 150); // set center

Or

aView.frame = CGRect(x: 100, y: 200, width: aView.frame.size.width, height: aView.frame.size.height ); // set new position exactly

Or

aView.frame = aView.frame.offsetBy(dx: CGFloat(10), dy: CGFloat(10)) // offset by an amount

I had the same problem. I made a simple UIView category that fixes that.

.h

#import <UIKit/UIKit.h>


@interface UIView (GCLibrary)

@property (nonatomic, assign) CGFloat height;
@property (nonatomic, assign) CGFloat width;
@property (nonatomic, assign) CGFloat x;
@property (nonatomic, assign) CGFloat y;

@end

.m

#import "UIView+GCLibrary.h"


@implementation UIView (GCLibrary)

- (CGFloat) height {
    return self.frame.size.height;
}

- (CGFloat) width {
    return self.frame.size.width;
}

- (CGFloat) x {
    return self.frame.origin.x;
}

- (CGFloat) y {
    return self.frame.origin.y;
}

- (CGFloat) centerY {
    return self.center.y;
}

- (CGFloat) centerX {
    return self.center.x;
}

- (void) setHeight:(CGFloat) newHeight {
    CGRect frame = self.frame;
    frame.size.height = newHeight;
    self.frame = frame;
}

- (void) setWidth:(CGFloat) newWidth {
    CGRect frame = self.frame;
    frame.size.width = newWidth;
    self.frame = frame;
}

- (void) setX:(CGFloat) newX {
    CGRect frame = self.frame;
    frame.origin.x = newX;
    self.frame = frame;
}

- (void) setY:(CGFloat) newY {
    CGRect frame = self.frame;
    frame.origin.y = newY;
    self.frame = frame;
}

@end