I am changing the UIButton image on button click but it gets postion changes from original to left side. I don't know why this is happening.
Below is the button. When I select the second button, it changes image and gets to the left side. How do I fix this error ?
Below is my code
-(IBAction)locationOneButtonAction{
UIImage *buttonImage = [UIImage imageNamed:#"radiogreen.png"];
UIImage *buttonImageOne=[UIImage imageNamed:#"radiowhite.png"];
[locationOneButton setImage:buttonImage forState:UIControlStateNormal];
[locationOneButton setImage:buttonImage forState:UIControlStateNormal];
[locationThreeButton setImage:buttonImageOne forState:UIControlStateNormal];
[locationTwoButton setImage:buttonImageOne forState:UIControlStateNormal];
[locationFourButton setImage:buttonImageOne forState:UIControlStateNormal];
[locationFiveButton setImage:buttonImageOne forState:UIControlStateNormal];
[locationSixButton setImage:buttonImageOne forState:UIControlStateNormal];
resturantLocation=#"Common Man - Bedford, MA";
}
I am not hundred percent sure about your case but it usually happen because of transparent space in both images, please overlap your images in Photoshop and make sure both images should have same margins and also should be of same size.
setImage wont stretch your image to fill frame of your button, it will set to center of button.
Make sure your image size and frame of your button is equal.
Else you can use setBackgroundImage which is will stretch your image to fill frame of button.
Related
I have two UIButtons in my app, which are custom buttons with background images, so they look like two dice. When my app is run on something not-iPhone 5 (not 4.0 inch screen) I want the to resize the buttons. I already have the code that checks for non-iPhone 5 devices(and it works), I just need to know how to change the size of the UIButtons.
I have tried lots of answers for similar questions, but so far I have not written any code that actually changes the size of my UIButtons.
I have written something like this in the "viewDidLoad" inside my "check-if-screen-is-non-iPhone-5"-statement:
button.frame = CGRectMake(90, 200, 100, 100);
The answer will depend on whether you're using Interface Builder or creating yoru button programatically. Most likely, you want to set the "content mode" of the button's imageView; then update the button's frame.
Here is an example:
UIImage *image = [UIImage imageNamed:#"close"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.bounds = CGRectMake( 0, 0, image.size.width, image.size.height);
button.autoresizingMask = UIViewAutoresizingFlexibleHeight;
[button.imageView setContentMode:UIViewContentModeScaleAspectFit];
[button setImage:image forState:UIControlStateNormal];
Good luck.
I tried tintColor = [UIColor redColor] and it does the job, but it only show the expected color when the button is being pressed.
In Coloration of UIButtons of type UIButtonTypeRoundedRect they answer the same question but you need an image to implement it, is there any way to do it without an image?
Here is what i want: image
Here is what i'm getting using images: image
Remember... NO IMAGES!
well using an image is one way of doing it, but i guess you already clear that in your question that you do not wish to use an image. here is button that i created and colored programmatically.
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
btn.frame = CGRectMake(100, 100, 100,50);
[btn setTitle:#"Hello" forState:UIControlStateNormal];
[btn setBackgroundColor:[UIColor colorWithRed:128.0/255.0f green:0.0/255.0f blue:0.0/255.0f alpha:0.7]];
btn.frame = CGRectMake(100.0, 100.0, 120.0, 50.0);//width and height should be same value
btn.clipsToBounds = YES;
btn.layer.cornerRadius = 20;//half of the width
btn.layer.borderColor=[UIColor redColor].CGColor;
btn.layer.borderWidth=2.0f;
[self.view addSubview:btn];
you can change the [UIColor ColorWithRed: wo whatever you want or even use [UIColor redColor] or any other things you want to do with this.
here is a screen shot:
adding a background color to rounded button is not possible, change the type of the button to custom and then use quartz core to set a round button. so add that to your project and import it in the .m and it should work. hope this works for you man.
to change the button to something similar to the image you showed change the frame to :
btn.frame = CGRectMake(50.0, 100.0, 200.0, 50.0);
and change the radius to :
btn.layer.cornerRadius = 7;
that should do it.
You can create a method to generate an UIImage from a UIColor and then set the returned image as the background of the button, for example:
- (UIImage *)imageWithColor:(UIColor *)color {
CGRect rect = CGRectMake(0, 0, 1, 1);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
UIImage *image = [self imageWithColor:[UIColor colorWithRed:151.0/255.0
green:36.0/255.0
blue:40.0/255.0
alpha:1.0]];
[self.button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[self.button setBackgroundImage:image forState:UIControlStateNormal];
self.button.layer.cornerRadius = 6.0;
self.button.layer.borderWidth = 1.0;
self.button.layer.borderColor = [UIColor darkGrayColor].CGColor;
self.button.clipsToBounds = YES;
Using this I get
here's how I should do it:
download a button image from the internet or create an image yourself, to make it look like you want it to look like. Photoshop might be your best shot for this. make sure you have a transparent background and save it as a .png.
then add it to your xcode project. to make the button:
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
[btn setBackgroundImage:[UIImage imageNamed:#"yourImage.png"] forState:UIControlStateNormal];
[btn addTarget:self action:#selector(buttonAction)
forControlEvents:UIControlEventTouchDown];
[btn setTitle:#"Use it!" forState:UIControlStateNormal];
btn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
btn.titleLabel.font = [UIFont systemFontOfSize:20];
btn.frame = CGRectMake(position and size of your button);
[self.view addSubview:btn];
yourImage.png needs to be replaced with the name of your image.
The buttonAction is the action your button performs when it's tapped. if you just add:
- (void) buttonAction
{
}
anywhere in your file, anything you added between those brackets will be performed.
Make sure the size of your button is the same as the size of your CGRect, to make sure it doesn't look stretched out or anything you don't want it to look like.
If you have any questions, feel free to ask them.
Hope this helped you
I have a problem with UIButton image if I set its imageView contentMode to UIViewContentModeScaleAspectFill.
UIButton *imageButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 100)];
imageButton.imageView.contentMode = UIViewContentModeScaleAspectFill;
[imageButton setImage:[UIImage imageNamed:#"myImage.jpg"] forState:UIControlStateNormal];
[imageButton addTarget:self action:#selector(doSmth:) forControlEvents:UIControlEventTouchUpInside];
The image inside button is properly scaled to fill the whole button area.
After a click/touch on button the image gets resized (flickers) like if it's contentMode is set to UIViewContentModeScaleAspectFit.
Does anyone know how to remove this flickering when click/touch occurs?
Thanks!
Why are you setting content mode of the button's imageView? The image, you set for specified state, is always filling the size of the button. So you have to set button's frame size to the size of the image and not to set imageView contentMode
The flickering could be the higlighting of the button. If you want to set custom image for highlighting, use this code:
[imageButton setImage:buttonHightlightImage forState:UIControlStateHightlighted]
Just disable/uncheck the highlighted adjusts image in attributes inspector for imageButton
I have a UIButton with no text and have 2 images I'd like to use (one for normal state and the other for selected state). The images are smaller than the button size.
How do I ensure that neither of the images are scaled when the button is drawn? Setting the imageView properties only change the scale correctly for normal state but not for selected.
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:imageNormal forState:UIControlStateNormal];
[button setImage:imageSelected forState:UIControlStateSelected];
// this shows the correct scale in normal mode but not when button is tapped
button.imageView.contentScaleFactor = 1.0;
button.imageView.contentMode = UIViewContentModeCenter;
Assuming you have the image height and width you could do this:
int topBottom = (button.frame.size.height - imageHeight) / 2;
int leftRight = (button.frame.size.width - imageWidth) / 2;
button.imageEdgeInsets = UIEdgeInsetsMake(topBottom,leftRight,topBottom,leftRight);
And then you don't need to set the contentMode/scalefactor.
i'm creating a button programmaticly for an iPad application. when i see the button, there looks to be a shadow type thing below it. what is it and how can i get rid of it?
here is the code that creates it:
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
myButton.titleLabel.font = [UIFont fontWithName:#"Trebuchet MS" size:12];
[myButton setTitle:#"test" forState:UIControlStateNormal];
myButton.frame = CGRectMake(0, 0, self.leftScrollView.frame.size.width, 50);
UIImageView *myImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"gear12.png"]];
[myButton addSubview:myImageView];
[self.leftScrollView addSubview:myButton];
UPDATE:
ok, i notice i only get that effect when its in my scrollview. if i add it to the view, no shadow effect.
the top test button, the button is a subview of the view. the bottom button is a subview of the scrollview which is a subview of the view (button/view vs button/scrollview/view).
white section is the view, grey is the scrollview/view.
UPDATE 2:
as pointed out by robmayor, UIButtons always have that double line effect, just not noticeble when the background color is white. the blue is a view and the grey is the subview scrollview.
This question is old (6 months) but i'have found a solution to delete/mask this bad effect of double lines.
[yourButton.layer setBackgroundColor: [[UIColor blackColor]CGColor]];
[yourButton.layer setBorderWidth:1.0f];
[yourButton.layer setBorderColor:[[UIColor blackColor]CGColor]];
[yourButton.layer setShadowOpacity:0.1f];
[yourButton.layer setCornerRadius:10];
UIColor selected is depending of the current background of your view.
Result :
On iPads, a rounded-rect UIButton always draws a white line along its bottom edge. You can't see that white line if the button's superview is white, but it's still there.
You have a few options:
Make the superview white. This is the easiest but you might not like the way it looks.
Make some rounded rect images in your favorite image editor. Set the button type to custom and set your rounded rect images as the button's images.
Make a subclass of UIButton and override its drawRect: method.
Set the button type to custom and use the button's layer properties (button.layer.backgroundColor, button.layer.borderColor, button.layer.borderWidth, button.layer.cornerRadius) to give the button a rounded rect appearance. You'll have to update button.layer.backgroundColor when the button is touched if you want it to turn blue like a normal one does. (Actually a normal one uses a blue gradient.)
Replace [UIButton buttonWithType:UIButtonTypeRoundedRect] with:
UIButton *myButton = [UIButton new];
or:
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
You want to have your customized button. You can still make it with rounded corners if needed.