How to set top-left alignment for UILabel for iOS application?

It's fairly easy to do. Create a UILabel sublcass with a verticalAlignment property and override textRectForBounds:limitedToNumberOfLines to return the correct bounds for a top, middle or bottom vertical alignment. Here's the code:

SOLabel.h

#import <UIKit/UIKit.h>typedef enum{    VerticalAlignmentTop = 0, // default    VerticalAlignmentMiddle,    VerticalAlignmentBottom,} VerticalAlignment;@interface SOLabel : UILabel   @property (nonatomic, readwrite) VerticalAlignment verticalAlignment;@end

SOLabel.m

@implementation SOLabel-(id)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (!self) return nil;    // set inital value via IVAR so the setter isn't called    _verticalAlignment = VerticalAlignmentTop;    return self;}-(VerticalAlignment) verticalAlignment{    return _verticalAlignment;}-(void) setVerticalAlignment:(VerticalAlignment)value{    _verticalAlignment = value;    [self setNeedsDisplay];}// align text block according to vertical alignment settings-(CGRect)textRectForBounds:(CGRect)bounds     limitedToNumberOfLines:(NSInteger)numberOfLines{   CGRect rect = [super textRectForBounds:bounds                    limitedToNumberOfLines:numberOfLines];    CGRect result;    switch (_verticalAlignment)    {       case VerticalAlignmentTop:          result = CGRectMake(bounds.origin.x, bounds.origin.y,                               rect.size.width, rect.size.height);           break;       case VerticalAlignmentMiddle:          result = CGRectMake(bounds.origin.x,                     bounds.origin.y + (bounds.size.height - rect.size.height) / 2,                    rect.size.width, rect.size.height);          break;       case VerticalAlignmentBottom:          result = CGRectMake(bounds.origin.x,                     bounds.origin.y + (bounds.size.height - rect.size.height),                    rect.size.width, rect.size.height);          break;       default:          result = bounds;          break;    }    return result;}-(void)drawTextInRect:(CGRect)rect{    CGRect r = [self textRectForBounds:rect                 limitedToNumberOfLines:self.numberOfLines];    [super drawTextInRect:r];}@end

Rather than re-explaining, I will link to this rather extensive & highly rated question/answer:

Vertically align text to top within a UILabel

The short answer is no, Apple didn't make this easy, but it is possible by changing the frame size.

I found a solution using AutoLayout in StoryBoard.

1) Set no of lines to 0 and text alignment to Left.

2) Set height constraint.

3) The height Constraint should be in Relation - Less Than or Equal

4)

   override func viewWillLayoutSubviews() {        sampleLabel.sizeToFit()    }

I got the result as follows :