How to Vertically Align Text Using UILabel and NSAttributedString

Raon Published at Dev

Raon

I am using UILabel and NSAttributedString to set linespacing for label texts in IOS7. But when i use this the text doesnt seems aligned centrally on the Label. Here is my code to set text (attributed) to the label.

-(void)setText:(NSString *)text
{
    [super setText:text];

    if(text)
        [self setLineSpace];
}
-(void)setLineSpace
{
    if([[[UIDevice currentDevice] systemVersion] floatValue] >= 7)
    {
        NSMutableAttributedString *string=[[NSMutableAttributedString alloc]initWithString:self.text];

        NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle defaultParagraphStyle] mutableCopy];
        paragraphStyle.alignment=NSTextAlignmentJustified;
        [paragraphStyle setLineSpacing:4] ;
//        paragraphStyle.minimumLineHeight =0;
//        paragraphStyle.maximumLineHeight=7;
     //  CTTextAlignment alignment = kCTCenterTextAlignment;
        [string addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, string.length)];
        self.text=nil;
        self.attributedText=string;

        [self setBackgroundColor:[UIColor redColor]];

    }

}

Here are some Screenshots ,BTW am subclassing UILabel to and overriding the setter to implement linespacing.

enter image description here

Raon

Actually I solved it ....:) :) .The problem was with the custom font i was using.

Took some R&D but now it seems working

Just created a subclass for label and override some default methods.

- (CGRect)textRectForBounds:(CGRect)bounds limitedToNumberOfLines:(NSInteger)numberOfLines
{

    CGRect textRect = [super textRectForBounds:bounds limitedToNumberOfLines:numberOfLines];

    if(([self.font.fontName isEqualToString:@"Gotham"]||[self.font.fontName isEqualToString:@"Gotham-Bold"]||[self.font.fontName isEqualToString:@"Gotham-Medium"])&&((int)[[[UIDevice currentDevice] systemVersion] floatValue])==6&&self.verticalAlignment==AlignMiddle)
    {
        textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;
        return [self addToRect:textRect x:0 y:2];
    }
    return [self addToRect:textRect x:0 y:0.5];
}

-(void)drawTextInRect:(CGRect)requestedRect
{
    if(((int)[[[UIDevice currentDevice] systemVersion] floatValue])>=7)
       [super drawTextInRect:[self addToRect:requestedRect x:0 y:0.5]];
    else
    {
        CGRect actualRect = [self textRectForBounds:requestedRect limitedToNumberOfLines:self.numberOfLines];
        [super drawTextInRect:actualRect];
    }
}
-(CGRect)addToRect:(CGRect)rect x:(CGFloat)dx y:(CGFloat) dy
{
    rect=CGRectMake(rect.origin.x+dx, rect.origin.y+dy, rect.size.width, rect.size.height);
    return rect;
}
-(CGRect)makeRect:(CGRect)rect x:(CGFloat)dx y:(CGFloat) dy
{
    rect=CGRectMake(dx,dy, rect.size.width+dx, rect.size.height+dy);
    return rect;
}
-(CGRect)makeRects:(CGRect)rect x:(CGFloat)dx y:(CGFloat) dy
{
    rect=CGRectMake(rect.origin.x,rect.origin.y, rect.size.width+dx, rect.size.height+dy);
    return rect;
}
-(void)truncateToFit
{
    if([[[UIDevice currentDevice] systemVersion] floatValue] < 7)
    {
        [self sizeToFit];
        CGRect frame=self.frame;
    if(frame.size.height<self.frame.size.height)
        self.frame=[self makeRects:frame x:0 y:0.5];
    }
    else
    {
        self.frame=[self makeRects:self.frame x:0 y:0.5];
        [self sizeToFit];
    }
}

-(void)truncatesToFit
{
    self.lineBreakMode=NSLineBreakByTruncatingTail;

        self.numberOfLines=2;
        [self sizeToFit];
        self.frame=[self makeRects:self.frame x:0 y:0.5];
}




-(void)truncatesToFit:(NSInteger )linesCount

{

    self.numberOfLines=linesCount;

    [self sizeToFit];

    self.frame=[self makeRects:self.frame x:0 y:0.5];

}

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