How the UILabel can be aligned from bottom. Let say, my label can hold three line of text.If the input text is single line, then this line should come bottom of the label.Please refer the below image for better understanding. The orange area is the full frame of label.Currently it has one line and it is aligned center. So what I want is, it should always aligned bottom regardless of how many lines.
Please suggest your ideas.
Thank you.
Swift 4.2 version using the contentMode property to set top and bottom:
class VerticalAlignedLabel: UILabel {
override func drawText(in rect: CGRect) {
var newRect = rect
switch contentMode {
case .top:
newRect.size.height = sizeThatFits(rect.size).height
case .bottom:
let height = sizeThatFits(rect.size).height
newRect.origin.y += rect.size.height - height
newRect.size.height = height
default:
()
}
super.drawText(in: newRect)
}
}
Then setup your label like that:
let label = VerticalAlignedLabel()
label.contentMode = .bottom
Here are two ways of doing that...
1. First set numberOfLines to 0 and then use sizeToFit property of UILabel so your UILabel display with its contentSize.
yourLabel.numberOfLines = 0;
[yourLabel sizeToFit];
See more information from this link: Vertically align text within a UILabel
2. Another option is to take UITextField instead of UILabel and set userInteractionEnabled to NO like below...
[yourTextField setUserInteractionEnabled:NO];
and then set the contentVerticalAlignment property to bottom like below...
[yourTextField setContentVerticalAlignment:UIControlContentVerticalAlignmentBottom];
UPDATE
Also, with UITextField, we can't achieve multiple lines. So instead we can use UITextView and set its userInteractionEnabled to NO. Then, use the code below to make it bottom aligned.
CGFloat topCorrect = ([label bounds].size.height - [label contentSize].height);
topCorrect = (topCorrect <0.0 ? 0.0 : topCorrect);
label.contentOffset = (CGPoint){.x = 0, .y = -topCorrect};
Subclass UILabel
@interface Label : UILabel
@end
Then override drawTextInRect like so
@implementation Label
- (void)drawTextInRect:(CGRect)rect
{
if(alignment == top) {
rect.size.height = [self sizeThatFits:rect.size].height;
}
if(alignment == bottom) {
CGFloat height = [self sizeThatFits:rect.size].height;
rect.origin.y += rect.size.height - height;
rect.size.height = height;
}
[super drawTextInRect:rect];
}
@end
i only set a bottom constraint to the super view in IB which works for me without using code and also number of Lines for a maximum constraint.
I recently ran into this problem and was able to solve it by putting my label in a stackview by itself. I got the idea from this post which had the same question but with multiple labels. The same technique can be used with a single label.
The stackview would have axis = horizontal and alignment = bottom (which is what does the trick).
My label is now perfectly aligned towards the bottom which is what I needed.
Put your UILabel in a vertical UIStackView with a dummy view as a spacer. Also, set the dummy view with a lower hugging and compression priority.
Top to Bottom:
Bottom to Top:
Swift 5 version of @Dustin code:
Subclass:
class VerticallyAlignedUILabel: UILabel {
enum Alignment {
case top
case bottom
}
var alignment: Alignment = .top
override func drawText(in rect: CGRect) {
var rect = rect
if alignment == .top {
rect.size.height = sizeThatFits(rect.size).height
} else if alignment == .bottom {
let height = sizeThatFits(rect.size).height
rect.origin.y += rect.size.height - height
rect.size.height = height
}
super.drawText(in: rect)
}
}
Usage:
let myLabel = VerticallyAlignedUILabel()
myLabel.text = "vertically aligned text"
myLabel.alignment = .bottom
I had the same issue. Here is how I made to align the text to the bottom of my UILabel:
- (void)alignLabel:(UILabel *)l withText:(NSString *)text verticalAlignOption:(int)vertAlign{
CGSize stringSize = [text sizeWithFont:l.font constrainedToSize:l.frame.size lineBreakMode:l.lineBreakMode];
switch (vertAlign) {
case 0: // align = top
l.frame = CGRectMake(l.frame.origin.x,
l.frame.origin.y,
l.frame.size.width,
stringSize.height
);
break;
case 1: // align = bottom
l.frame = CGRectMake(l.frame.origin.x,
(l.frame.origin.y + l.frame.size.height) - stringSize.height,
l.frame.size.width,
stringSize.height
);
break;
case 2: // align = middle
// default
break;
}
l.text = text;
}
Ahd you simple call the method like this to align to the bottom:
[self alignLabel:self.mediaTitle withText:@"My text to align" verticalAlignOption:1];
Another option: use one label for your background color, I call this one originalLabel, and another for the text, called textLabel in my example. Then calculate the height and Y coordinate for textLabel:
[textLabel sizeToFit];
int height = textLabel.frame.size.height;
int yCoord = originalLabel.frame.origin.y +
originalLabel.frame.size.height - height;
textLabel.frame = CGRectMake( originalLabel.frame.origin.x, yCoord,
textLabel.frame.size.width, height);
In IB as @Tobe said Bottom constraint to superview should work,
Incase if you have multiple subview or horizontal stack view with one element to have bottom constraint then use Layout Margin to be Fixed with bottom less than other margins
class VerticalAlignedLabel: UILabel {
let bottomSpacing: CGFloat = 10.0
override func drawText(in rect: CGRect) {
var newRect = rect
let height = sizeThatFits(rect.size).height
newRect.origin.y = rect.origin.y + rect.size.height - height - bottomSpacing
newRect.size.height = height
super.drawText(in: newRect)
}
}
You can subclass UILabel and overriding the method :
- (void)drawTextInRect:(CGRect)rect
call super drawTextInRect with the rect where you want to use.
textLabel.numberOfLines = 0
textLabel.textAlignment = .center
textLabel.topAnchor.constraint(greaterThanOrEqualTo: sView.topAnchor).isActive = true
textLabel.leadingAnchor.constraint(equalTo: sView.leadingAnchor).isActive = true
textLabel.trailingAnchor.constraint(equalTo: sView.trailingAnchor).isActive = true
textLabel.bottomAnchor.constraint(equalTo: sView.bottomAnchor).isActive = true
