Just like the image shown. How can I align a button to the right? CGRectMake seems only create frame based on the float x, y which origin from the left top corner. Thanks for any help.
The x origin depend of the width of the superview (in my example self.view)
#define RIGHT_MARGIN 20
myButton.frame = CGRectMake(self.view.frame.size.width - myButton.frame.size.width - RIGHT_MARGIN, yValue, myButton.frame.size.width, myButton.frame.size.height)
For generic UIButtonTypeCustom:
yourbutton.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;
yourbutton.titleLabel.textAlignment = UITextAlignmentRight; only works if you do have a titleLabel.
If you want to set text to the right alignment the try this code.
yourbutton.titleLabel.textAlignment = UITextAlignmentRight;
If you set tmage then see this answer
Related
I want to center image to center Y position of first line of text of my UILabel. I use masonry to set Auto Layout constraints like that:
[_haveReadIndicatorImgView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.left.equalTo(self.contentView).offset(SMALL_OFFSET);
make.height.width.equalTo(#(8));
}];
[_topTxtlbl mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(_haveReadIndicatorImgView.mas_right).offset(TINY_OFFSET);
make.top.equalTo(_haveReadIndicatorImgView.mas_top);
make.right.equalTo(self.arrowImgView.mas_left).offset(-SMALL_OFFSET);
make.bottom.equalTo(_dateTxtLbl.mas_top).offset(-SMALL_OFFSET);
}];
It should be pretty strightforward. I simply attach top of UIImageView to top of my Label.
But take a look at screen.
Top edges of UIImageView (gray dot) and label are equal, but how to make UIImageView to be centered to first line of text like that?
Thanks.
Actually there is a way of doing this! If you use plain old AutoLayout this can be done with the following snippet:
// Aligns the icon to the center of a capital letter in the first line
let offset = label.font.capHeight / 2.0
// Aligns the icon to the center of the whole line, which is different
// than above. Especially with big fonts this makes a visible difference.
let offset = (label.font.ascender + label.font.descender) / 2.0
let constraints: [NSLayoutConstraint] = [
imageView.centerYAnchor.constraint(equalTo: label.firstBaselineAnchor, constant: -offset),
imageView.trailingAnchor.constraint(equalTo: label.leadingAnchor, constant: -10)
]
NSLayoutConstraint.activate(constraints)
The first constraint will display your icon at the Y center of the first line of your label. The second one puts your icon left of the label and creates a 10pt space between them.
Hope this helps!
You derive the middle of the first line by using the lineHeight for the font of your label.
let lineHeight = ceil(multiLineLabel.lineHeight)
let center = lineHeight / 2
Now that you have the center, you can center the haveReadIndicatorImgView's centerYAnchor to the top of your label with a constant: center
I solved this recently by adding a hidden single line label in exactly the same location and font as the multiline one, without a bottom constraint.
Then you can simply align the icon image .centerY to the hidden label's .centerY.
I achieve following by 2 steps:
1) Calculate expected height of label line of text with specific font:
+(CGSize)getSimpleSizeBasedOnFont:(CGFloat)font{
UILabel *lbl = [UILabel new];
lbl.text = #"Simple text";
lbl.font = [UIFont systemFontOfSize:font];
return [lbl.text sizeWithFont:lbl.font
constrainedToSize:lbl.frame.size
lineBreakMode:NSLineBreakByWordWrapping];
}
Then i add constraints to center Y of UIImage View with offset equal to 50% of that height:
CGFloat lblOffs = [Helper getSimpleSizeBasedOnFont:14].height;
[_haveReadIndicatorImgView mas_makeConstraints:^(MASConstraintMaker *make) {
make.centerY.equalTo(_topTxtlbl.mas_top).offset(lblOffs/2);
make.left.equalTo(self.contentView).offset(SMALL_OFFSET);
make.height.width.equalTo(#(8));
}];
I have done this differently.
At first i align my imageView with label by FirstBaseLine.
And then i took an outlet of that LayoutConstraint
I have calculated an offset like below:
let offset = (label.font.capHeight + imageView.frame.size.height) / 2 //your bulleted image
I have discarded that offset from FirstBaseLine constant
firstBaseLineConstraintWithLabel.constant -= offset
Here is the output
My question is simple and I think it is possible but I cant find it.
My design is like this
I give corner radius to textview and also set textContainerInset for padding from right and left both side
txtview_msg.textContainerInset = UIEdgeInsetsMake(5, 10, 10, 5)
Now my problem is like for first 2 line and last 2 line my text goes beneath textview so I need some solution for it.
Please help me into this. Thank you
try this code
UIView *paddingView1 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, txtview_msg.frame.size.height - 30)];
txtview_msg.leftView = paddingView1;
txtview_msg.leftViewMode = UITextFieldViewModeAlways;
UIView *paddingView2 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 10, txtview_msg.frame.size.height - 30)];
txtview_msg.leftView = paddingView2;
txtview_msg.rightViewMode = UITextFieldViewModeAlways;
You can create at first a view of same size how much you given, put cornerRadius how much you given in textview now. than create textview viewSize - corner radius. place the textview exactly in middle of view. set the constraints from that view only, than it will work perfect how you want.
check this attached screenshot:
I have a UIButton, and I would like to access the UIImageView of its background image so that I can make the image circular. I know that I can affect the image itself but I would prefer to do this more elegantly. I also know that I can use the button.currentBackgroundImage property to get the UIImage in the background, but I want the view itself. Once I have the view I intend to use this code:
buttonImageView.layer.cornerRadius = buttonImageView.frame.size.width / 2;
buttonImageView.clipsToBounds = YES;
How can I access the buttonImageView?
EDIT:
Due to #vhristoskov's suggestions, I tried cropping the button itself with this code:
self.button.layer.cornerRadius = self.button.frame.size.width/2;
self.button.clipsToBounds = YES;
And it made this shape:
After debugging I found that frame.size.width was 46, when it should have been 100. So I tried this code instead:
self.button.layer.cornerRadius = self.button.currentBackgroundImage.size.width/2;
self.button.clipsToBounds = YES;
And that produced this shape:
And this time, the cornerRadius was being set to 65. So it actually seems like my problem is that I don't have the correct width at the moment. Which property should I access to get the correct number?
Well as I guessed and as you've already found - the problem is in the button size. To be sure that your button's size at runtime is what you expected to be - review your constraints. In the example below the button has vertical and horizontal central alignment and fixed width and height.
Constraints:
To have perfectly circular button you should have button.width == button.height. If this condition is met your code should work like a charm:
self.button.layer.cornerRadius = CGRectGetWidth(self.button.frame) / 2;
self.button.clipsToBounds = YES;
Assuming that you called something like:
[self.myButton setBackgroundImage:[UIImage imageNamed:#"image"] forState:UIControlStateNormal];
in viewDidLoad or earlier, you can then call the following in viewDidAppear:
if (self.myButton.subviews.count > 0 && [self.myButton.subviews[0] isKindOfClass:[UIImageView class]]) {
UIImageView *imageView = self.myButton.subviews[0];
imageView.layer.cornerRadius = imageView.frame.size.width / 2;
imageView.clipsToBounds = YES;
}
but it is not more elegant as the subview ordering is an implementation detail of UIButton and may change at any time.
I have a question in my app I have a number label (IBOutlet). And when I write self.numberLabel.backgroundColor = [UIColor redColor]; is showing a red color fit in the height of number, All I want is to make the background a little bit bigger. Thanks
self.numberLabel.frame = CGRectMake(self.numberLabel.frame.origin.x, self.numberLabel.frame.origin.y, widht, newHeight);
and to make sure font stay same size if needed
[self.numberLabel setFont:[UIFont systemFontOfSize:35]];
You have to set constraints in Interface Builder / Storyboard to fix your label height/width.
If your label's content changes in width, you can use this to calculate a new width with a bit of space left:
float labelWidth =
[self.myLabel.text
boundingRectWithSize:self.myLabel.frame.size
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{ NSFontAttributeName:self.myLabel.font }
context:nil]
.size.width;
CGRect rect = self.myLabel.bounds;
rect.size.width = labelWidth + 15.0f; //replace 15.0F with the value you want
[self.myLabel setBounds:rect];
There're many ways to skin a cat... in my case the content of the "uilabel" determines its size. I just want the background to be slightly bigger -- 5 points vertically, 7 points horizontally. So I use autolayout to solve it.
Add a uilabel as a subview to the background which is a uiview
Add constraints in IB between the uilabel and the uiview
Add constraints in IB between the uiview and its superview
I want to place the button lower relative the end of the text. How do I do this?
now so
Give the Height + Y of your label as Y value in your button and it will display below your label.
yourLabel = your current text label....
yourButton.frame = CGRectMake(yourXValue, yourLabel.frame.origin.y + yourLabel.frame.size.height ,yourwidthValue, yourHeightValue);
Or use this code.. whichever you like
CGRect frame =yourButton.frame;
frame.origin.y = yourLabel.frame.origin.y + yourLabel.frame.size.height;
yourButton.frame = frame;
You can't place it relative to the text. However, it looks like the text is in a UILabel which will expand depending on how much text there is.
All you have to do is place the button relative to the bottom of the label and it will be placed below the text.