I need to draw a rectangle on top of a UIButton. Assume that there's a UIButton called hideMe, and this button has 100x50 size. I want to place a 100x10 rectangle on top of this button every time a user receives a message. If the user receives five messages, then the button will be completely covered by the rectangles. How do I do this?
CALayer *topBorder = [CALayer layer];
topBorder.borderColor = [UIColor redColor].CGColor;
topBorder.backgroundColor = [UIColor blackColor].CGColor;
topBorder.borderWidth = 2;
topBorder.frame = CGRectMake(0, 15, <tempButton>.frame.size.width, <tempButton>.frame.size.height-30);
[<tempButton>.layer addSublayer:topBorder];
The above code helps you to draw the rectangle.You can increase the layer frames to cover full.
try this
#import <QuartzCore/QuartzCore.h>
here we are drawing our own border rect and sub viewing it to our button
-(UIView*)borderRectWithYvalue:(CGFloat)yValue
{
UIView * rect = [[UIView alloc] initWithFrame:CGRectMake(0,yValue, 100, 10)];
rect.backgroundColor = [UIColor lightGrayColor];
rect.layer.borderColor = (__bridge CGColorRef)([UIColor redColor]);
rect.layer.borderWidth = 2.0f;
return rect;
}
and call this method when and where you want to add border to your button with your custom y value
for ex
[yourButton addSubview:[self borderRectWithYvalue:10.0]];
Related
Here is my code to add a shadow on my uibutton which is created using a .XIB file
UIBezierPath *shadowPathEndbtn = [UIBezierPath bezierPathWithRect:CGRectMake(0, self->_navigationView.frame.size.height - 70,[UIScreen mainScreen].bounds.size.width , 2)];
self->_EndButton.layer.masksToBounds = NO;
self->_EndButton.layer.shadowColor = [UIColor blackColor].CGColor;
self->_EndButton.layer.shadowOffset = CGSizeMake(0.0f, 5.0f);
self->_EndButton.layer.shadowOpacity = 0.7f;
self->_EndButton.layer.shouldRasterize = YES;
self->_EndButton.layer.shadowPath = shadowPathForEndbtn.CGPath;
I am able to set the shadow using this code but this code makes my button text look blury. I am unable to figure out the exact reason behind this. Any help is Appreciated!
self->_EndButton.layer.masksToBounds = false
self->_EndButton.layer.shadowColor = [UIColor blackColor].CGColor
self->_EndButton.layer.contentsScale = [[UIScreen mainScreen]scale];
self->_EndButton.layer.shadowOpacity = 0.7f;
self->_EndButton.layer.shadowRadius = 10.0;
self->_EndButton.layer.shadowOffset = CGSizeMake(0,0)
This will give shadow and also the test is not blurry
Set button background color
self.EndButton.BackgroundColor=[UIColor WhiteColor];
I have tried this code to draw a circle of rectangle
incNumberDefault=0;
for (int i = 0; i < maxNumber; i++) {
incNumberDefault = incNumberDefault +5;
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(incNumberDefault, 100, 3, 15)];
myView.center = CGPointMake(130,130);
myView.transform = CGAffineTransformMakeRotation(DegreesToRadians(incNumberDefault));
myView.backgroundColor = [UIColor lightGrayColor];
[self.speedDisplay addSubview:myView];
}
the outputs seems close circle where as i need transparent or space in middle of circle.
You can set UIView cornerRadius to half of the UIView width or height like,
myView.layer.cornerRadius=myview.frame.size.width / 2; or
myView.layer.cornerRadius=myview.frame.size.height / 2
For that you have to give same width and height to your UIView.
Try this :
// initialize the view with same height and width for perfect circle.
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 15, 15)];
// round the corner of view with required radius.
myView.layer.cornerRadius = myView.frame.size.width/2; // height can also be used
// circle with space in middle.
myView.backgroundColor = [UIColor clearColor];
myView.layer.borderColor = [UIColor lightGrayColor].CGColor;
myView.layer.borderWidth = 2.0f;
[self.speedDisplay addSubview:myView];
Hope it will solve your problem.
Thank you for your answer but i want to develop a dashed circle in certain distance and i have tired this code :
incNumberDefault=0;
for (int i = 0; i < maxNumber; i++) {
UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(100+60 * sin(incNumberDefault), 100+60*cos(incNumberDefault), 3, 15)];
//myView.transform = CGAffineTransformMakeRotation(DegreesToRadians(incNumberDefault));
myView.backgroundColor = [UIColor lightGrayColor];
[self.speedDisplay addSubview:myView];
incNumberDefault = incNumberDefault +9;
}
but it generate random rectangle in a circle.
I want it in sequence.
Thank you.
I want to customize a UITextField in iOS 6 which will look like a transparent text field with only a bottom border.I have found one image in stackoverflow earlier,but as I don't have 10 reputation I can't post a image,but I am posting the link below.
Text field with bottom border only in ios6
There are multiple ways to accomplish this:
Create a seperatorView and add it subview to UITextfield with y axis as the height of textfield.
UITextfield *namefield = [[UITextfield alloc] initwithframe:CGRectMake(20,40,70,40) ];
UIView *seperator=[UIView new];
seperator.backgroundColor = [UIColor grayColor];
seperator.frame =CGRectMake(namefield.frame.origin.x, namefield frame.origin.y+namefield.frame.size.height-1, namefield.frame.size.width,1);
[namefield addSubView:seperator];
By using the CoreAnimation Class
CALayer *bottomBorder = [CALayer layer];
CGFloat borderWidth = 1;
bottomBorder.borderColor = [UIColor grayColor].CGColor;
bottomBorder.frame = CGRectMake(0, textField.frame.size.height - borderWidth, textField.frame.size.width, textField.frame.size.height);
bottomBorder.borderWidth = borderWidth;
[textField.layer addSublayer:border];
textField.layer.masksToBounds = YES;
By creating a custom class for UITextField and overriding drawRect method.
Using a image and adding as a backgroundColor to UITextfield.
I'm creating a UILabel to which I set the background color and corner radius with the following code:
self.scoreLabel.backgroundColor = [UIColor DISRed];// custom red`
self.scoreLabel.layer.masksToBounds = YES;
self.scoreLabel.layer.cornerRadius = self.scoreLabel.frame.size.width/2;
self.scoreLabel.layer.borderWidth = 8.0;
self.scoreLabel.layer.borderColor = [[UIColor DISNavy] CGColor];
However the background's color seems to be leaking to the edge of the border (see image). Any ideas why? Any idea on how to fix it?
I was also facing the same problem. It was a silly mistake. I always forget to tick clipToBounds in case of cornerRadius.
So, just ticking the Clip to Bounds for UILabel in Storyboard fixed my problem.
And yes, we need to keep the below code too:
label.layer.masksToBounds = true
I ran into the same problem with the UIButton's background color leaking around the edge of its border.
Instead of setting the UIButton background color on the UIButton, set it on the UIButton's layer.
Replace:
self.scoreLabel.backgroundColor = [UIColor DISRed];// custom red`
With this:
self.scoreLabel.layer.backgroundColor = [[UIColor DISRed] CGColor];// custom red`
I created my own UILabel and background colour does not seem to be leaking.
Write this in .h file of your project.
UILabel *label;
Write this in .m file of your project.
label=[[UILabel alloc]initWithFrame:CGRectMake(100, 300, 100, 100)];//Set frame of label in your viewcontroller.
[label setBackgroundColor:[UIColor redColor]];//Set background color of label.
[label setText:#"Label"];//Set text in label.
[label setTextColor:[UIColor blackColor]];//Set text color in label.
[label setTextAlignment:NSTextAlignmentCenter];//Set text alignment in label.
[label.layer setCornerRadius:50.0];//Set corner radius of label to change the shape.
[label.layer setBorderWidth:8.0f];//Set border width of label.
[label setClipsToBounds:YES];//Set its to YES for Corner radius to work.
[label.layer setBorderColor:[UIColor greenColor].CGColor];//Set Border color.
[self.view addSubview:label];//Add it to the view of your choice.
It is probably anti aliasing issue. you can better fix it by adding a bezier path around the corners.
CAShapeLayer *subLayer = [[CAShapeLayer alloc] init];
[subLayer setFillColor:[UIColor clearColor].CGColor];
[subLayer setStrokeColor:[UIColor whiteColor].CGColor];
[subLayer setLineWidth:1.0];
[subLayer setPath:[UIBezierPath bezierPathWithRoundedRect:imageView.bounds cornerRadius:imageView.layer.cornerRadius].CGPath];
[imageView.layer addSublayer:subLayer];
For those who are still facing the issue of border color leaking out:
Go through the below code, please note you will need to set frames & border width as per your requirement, I'm setting the position as view's center
let badgeSize: CGFloat = 10
let redBadge = UIView(frame: CGRect(x: view.center.x, y:view.center.y, width: badgeSize, height: badgeSize))
redBadge.layer.borderColor = UIColor.white.cgColor
redBadge.layer.borderWidth = 2
redBadge.backgroundColor = .red
redBadge.layer.cornerRadius = badgeSize * 0.5
redBadge.clipsToBounds = true
redBadge.layer.masksToBounds = true
redBadge.maskLayerOnView(radius: badgeSize * 0.5)
view.addSubview(redBadge)
Secondly, we need to write an extension on UIView
extension UIView{
func maskLayerOnView(radius: CGFloat){
let maskLayer = CAShapeLayer()
maskLayer.path = UIBezierPath(roundedRect: self.bounds,
byRoundingCorners: [.allCorners],
cornerRadii: CGSize(width: radius,
height: radius)).cgPath
self.layer.mask = maskLayer
}
}
This code snippet removes the border color separating out, one can replicate this behaviour on any kind of views.
For detailed explanation please see this article.
Well, a lot of answers...
I found the problem persists, as long as the UIViews background color is used and not the background color of the UIViews 'layer'. In addition, of course, masking needs to be enabled.
For a UICollectionViewCell subclass the code is:
- (void)prepare
{
self.contentView.layer.backgroundColor = UIColor.redColor.CGColor;
self.contentView.layer.cornerRadius = 25.0;
self.contentView.layer.borderColor = UIColor.blackColor.CGColor;
self.contentView.layer.borderWidth = 1.0;
//Enable to optimize image views: self.contentView.layer.shouldRasterize = YES;
//Enable to optimize image views: self.contentView.layer.rasterizationScale = UIScreen.mainScreen.scale;
self.contentView.layer.masksToBounds = YES;
self.contentView.clipsToBounds = YES;
}
To make the setting of the background color more comfortable and less error prone, some could add this:
/*
setBackgroundColor:
*/
- (void)setBackgroundColor:(UIColor *)p_BackgroundColor
{
super.backgroundColor = nil;
self.contentView.layer.backgroundColor = p_BackgroundColor.CGColor;
self.contentView.layer.masksToBounds = YES;
self.contentView.clipsToBounds = YES;
}
I'm trying to do the following thing -
I have two version of the same image, one colored and one black and white. I want the B&W to "Slide up" revealing the one under it.
I tried setting the height and the frame, but couldn't get it to work like I want it to.
For example , this would be a combination of both UIImages where one is revealing the other, while not moving:
Any ideas? :)
OK, here is a different method using a mask on the grey view. I actually tested this with a blueView and a greyView, where the grey covers up the blue. Put a mask layer on the grey layer so that the grey layer is visible. Now animate the mask away from the grey layer, making the grey layer disappear without moving it, the blue shows thru where the grey disappears.
If you want to experiment with this, create an empty project in XCode with a single view, and put this code inside viewDidLoad. That's how I tested this.
self.view.backgroundColor = [UIColor whiteColor];
UIView* blueView = [[[UIView alloc] init] autorelease];
blueView.backgroundColor = [UIColor blueColor];
blueView.frame = CGRectMake(50,50,100,100);
UIView* grayView = [[[UIView alloc] init] autorelease];
grayView.backgroundColor = [UIColor grayColor];
grayView.frame = CGRectMake(50,50,100,100);
[self.view addSubview:blueView];
[self.view addSubview:grayView]; // gray covers the blue
// Create a mask to allow the grey view to be visible and cover up the blue view
CALayer* mask = [CALayer layer];
mask.contentsScale = grayView.layer.contentsScale; // handle retina scaling
mask.frame = grayView.layer.bounds;
mask.backgroundColor = [UIColor blackColor].CGColor;
grayView.layer.mask = mask;
// Animate the position of the mask off the grey view, as the grey becomes unmasked,
// that part of the grey "dissappears" and is no longer covering the blue underneath
CABasicAnimation* a = [CABasicAnimation animationWithKeyPath:#"position"];
a.duration = 4;
a.fromValue = [NSValue valueWithCGPoint:mask.position];
CGPoint newPosition = mask.position;
newPosition.y += mask.bounds.size.height;
a.toValue = [NSValue valueWithCGPoint:newPosition];
a.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionLinear];
[mask addAnimation:a forKey:#"colorize"]; // animate presentation
mask.position = newPosition; // update actual position
Don't forget this line at the top with the #imports:
#import <QuartzCore/QuartzCore.h>
One way is to stack the UIView's so that the B&W image on top of the color image, where the color image is completely covered (hidden) by the B&W image.
[self.view insertSubview:bwImage aboveSubview:colorImage];
Only the B&W view is visible. Now set clipsToBounds on the B&W view:
bwImage.clipsToBounds = YES;
Finally animate the height in the bounds of the bwImage so that its height shrinks down to 0, clipping the B&W image and revealing the color image behind it. Something like this:
[UIView animateWithDuration:1.0 animations:^{
CGRect b = bwImage.bounds;
b.size.height = 0;
bwImage.bounds = b;
}];
I haven't tried this but hopefully you get the idea.