Share a vertical top alignment UILabel

1. header file
# Import <Foundation/Foundation. h>
Typedef enum verticalignment {
VerticalAlignmentTop,
Verticalignmentmiddle,
Verticalignmentbottom,
} VerticalAlignment;

@ Interface VerticallyAlignedLabel: UILabel
{
@ Private
Verticalignment _;
}

@ Property (nonatomic, assign) verticalignment;
@ End

. M file
# Import "VerticallyAlignedLabel. h"

@ Implementation VerticallyAlignedLabel

@ Synthesize verticalignment = verticalignment _;

-(Id) initWithFrame :( CGRect) frame
{
Self = [super initWithFrame: frame];
If (self)
{
Self. verticalAlignment = verticalignmentmiddle;
}
Return self;
}

-(Void) setVerticalAlignment :( VerticalAlignment) verticalignment
{
VerticalAlignment _ = verticalignment;
[Self setNeedsDisplay];
}

-(CGRect) textRectForBounds :( CGRect) bounds limitedToNumberOfLines :( NSInteger) numberOfLines
{
CGRect textRect = [super textRectForBounds: bounds limitedToNumberOfLines: numberOfLines];
Switch (self. verticalAlignment ){
Case VerticalAlignmentTop:
TextRect. origin. y = bounds. origin. y;
Break;
Case VerticalAlignmentBottom:
TextRect. origin. y = bounds. origin. y + bounds. size. height-textRect. size. height;
Break;
Case VerticalAlignmentMiddle:
// Fall through.
Default:
TextRect. origin. y = bounds. origin. y + (bounds. size. height-textRect. size. height)/2.0;
}
Return textRect;
}

-(Void) drawTextInRect :( CGRect) requestedRect
{
CGRect actualRect = [self textRectForBounds: requestedRect limitedToNumberOfLines: self. numberOfLines];
[Super drawTextInRect: actualRect];
}
@ End

 

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