I saw in the inspector that I can change the background color, but I'd like to also change the border color and thickness, is this possible?
You need to use view's layer to set border property. e.g:
#import <QuartzCore/QuartzCore.h>
...
view.layer.borderColor = [UIColor redColor].CGColor;
view.layer.borderWidth = 3.0f;
You also need to link with QuartzCore.framework to access this functionality.
Xcode 6 update
Since Xcode's newest version there is a better solution to this:
With @IBInspectable
you can set Attributes directly from within the Attributes Inspector
.
https://i.stack.imgur.com/Vuoku.gif
This sets the User Defined Runtime Attributes
for you:
https://i.stack.imgur.com/2nXiO.gif
There are two approaches to set this up:
Option 1 (with live updating in Storyboard)
Create MyCustomView. This inherits from UIView. Set @IBDesignable (this makes the View update live).* Set your Runtime Attributes (border, etc.) with @IBInspectable Change your Views Class to MyCustomView Edit in Attributes Panel and see changes in Storyboard :)
`
@IBDesignable
class MyCustomView: UIView {
@IBInspectable var cornerRadius: CGFloat = 0 {
didSet {
layer.cornerRadius = cornerRadius
layer.masksToBounds = cornerRadius > 0
}
}
@IBInspectable var borderWidth: CGFloat = 0 {
didSet {
layer.borderWidth = borderWidth
}
}
@IBInspectable var borderColor: UIColor? {
didSet {
layer.borderColor = borderColor?.CGColor
}
}
}
* @IBDesignable
only works when set at the start of class MyCustomView
Option 2 (not working since Swift 1.2, see comments)
Extend your UIView Class:
extension UIView {
@IBInspectable var cornerRadius: CGFloat = 0 {
didSet {
layer.cornerRadius = cornerRadius
layer.masksToBounds = cornerRadius > 0
}
}
@IBInspectable var borderWidth: CGFloat = 0 {
didSet {
layer.borderWidth = borderWidth
}
}
@IBInspectable var borderColor: UIColor? {
didSet {
layer.borderColor = borderColor?.CGColor
}
}
}
This way, your default View always has those extra editable fields in Attributes Inspector
. Another advantage is that you don't have to change the class to MycustomView
every time. However, one drawback to this is that you will only see your changes when you run your app.
You can also create border with the color of your wish..
view.layer.borderColor = [UIColor colorWithRed:r/255.0 green:g/255.0 blue:b/255.0 alpha:1.0].CGColor;
*r,g,b are the values between 0 to 255.
r
, g
and b
should probably be floats; the divisors should also be floats: r / 255.0
.
Add following @IBInspectables in UIView extension
extension UIView {
@IBInspectable var borderWidth: CGFloat {
get {
return layer.borderWidth
}
set(newValue) {
layer.borderWidth = newValue
}
}
@IBInspectable var borderColor: UIColor? {
get {
if let color = layer.borderColor {
return UIColor(CGColor: color)
}
return nil
}
set(newValue) {
layer.borderColor = newValue?.CGColor
}
}
}
And then you should be able to set borderColor and borderWidth attributes directly from Attribute inspector. See attached image
When I use Vladimir's CALayer solution, and on top of the view I have an animation, like a modal UINavigationController dismissing, I see a lot of glitches happening and having drawing performance issues.
So, another way to achieve this, but without the glitches and performance loss, is to make a custom UIView and implement the drawRect
message like so:
- (void)drawRect:(CGRect)rect
{
CGContextRef contextRef = UIGraphicsGetCurrentContext();
CGContextSetLineWidth(contextRef, 1);
CGContextSetRGBStrokeColor(contextRef, 255.0, 255.0, 255.0, 1.0);
CGContextStrokeRect(contextRef, rect);
}
setNeedsDisplay
on the view. This will force the redraw of the UIView and implicitly will re-call drawRect
. Not tested, tho ...
view.layer.borderWidth = 1.0
view.layer.borderColor = UIColor.lightGray.cgColor
Try this code:
view.layer.borderColor = [UIColor redColor].CGColor;
view.layer.borderWidth= 2.0;
[view setClipsToBounds:YES];
I wouldn't suggest overriding the drawRect due to causing a performance hit.
Instead, I would modify the properties of the class like below (in your custom uiview):
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
self.layer.borderWidth = 2.f;
self.layer.borderColor = [UIColor redColor].CGColor;
}
return self;
I didn't see any glitches when taking above approach - not sure why putting in the initWithFrame stops these ;-)
I wanted to add this to @marczking's answer (Option 1) as a comment, but my lowly status on StackOverflow is preventing that.
I did a port of @marczking's answer to Objective C. Works like charm, thanks @marczking!
UIView+Border.h:
#import <UIKit/UIKit.h>
IB_DESIGNABLE
@interface UIView (Border)
-(void)setBorderColor:(UIColor *)color;
-(void)setBorderWidth:(CGFloat)width;
-(void)setCornerRadius:(CGFloat)radius;
@end
UIView+Border.m:
#import "UIView+Border.h"
@implementation UIView (Border)
// Note: cannot use synthesize in a Category
-(void)setBorderColor:(UIColor *)color
{
self.layer.borderColor = color.CGColor;
}
-(void)setBorderWidth:(CGFloat)width
{
self.layer.borderWidth = width;
}
-(void)setCornerRadius:(CGFloat)radius
{
self.layer.cornerRadius = radius;
self.layer.masksToBounds = radius > 0;
}
@end
@IBInspectable is working for me on iOS 9 , Swift 2.0
extension UIView {
@IBInspectable var borderWidth: CGFloat {
get {
return layer.borderWidth
}
set(newValue) {
layer.borderWidth = newValue
}
}
@IBInspectable var cornerRadius: CGFloat {
get {
return layer.cornerRadius
}
set(newValue) {
layer.cornerRadius = newValue
}
}
@IBInspectable var borderColor: UIColor? {
get {
if let color = layer.borderColor {
return UIColor(CGColor: color)
}
return nil
}
set(newValue) {
layer.borderColor = newValue?.CGColor
}
}
If you didn't want to edit the layer of a UIView, you could always embed the view within another view. The parent view would have its background color set to the border color. It would also be slightly larger, depending upon how wide you want the border to be.
Of course, this only works if your view isn't transparent and you only want a single border color. The OP wanted the border in the view itself, but this may be a viable alternative.
item's border color in swift 4.2:
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell_lastOrderId") as! Cell_lastOrder
cell.layer.borderWidth = 1
cell.layer.borderColor = UIColor.white.cgColor
cell.layer.cornerRadius = 10
If you want to add different border on different sides, may be add a subview with the specific style is a way easy to come up with.
[self.view.layer setBorderColor: [UIColor colorWithRed:0.265 green:0.447 blue:0.767 alpha:1.0f].CGColor];
Success story sharing
__bridge CGColorRef
. This does not work. It needs to be[UIColor blackColor].CGColor
as mentioned in answer.#import <QuartzCore/QuartzCore.h>
is no longer needed.