Multiline UILabel의 수직 정렬 (Top / Center / Bottom)

#import <Foundation/Foundation.h>

typedef enum VerticalAlignment {

VerticalAlignmentTop,

VerticalAlignmentMiddle,

VerticalAlignmentBottom,

VerticalAlignmentFlexible,

} VerticalAlignment;

@interface LWLabel : UILabel {

VerticalAlignment verticalAlignment_;

}

@property (nonatomic, assign) VerticalAlignment verticalAlignment;

- (CGRect)rectForText;

@end

@implementation LWLabel

@synthesize verticalAlignment = verticalAlignment_;

- (id)initWithFrame:(CGRect)frame {

if (self = [super initWithFrame:frame]) {

self.verticalAlignment = VerticalAlignmentMiddle;

}

return self;

}

- (void)setVerticalAlignment:(VerticalAlignment)verticalAlignment {

verticalAlignment_ = verticalAlignment;

[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: 

textRect.origin.y = bounds.origin.y + (bounds.size.height - textRect.size.height) / 2.0;

break;

case VerticalAlignmentFlexible: 

textRect.origin.y = bounds.origin.y;

break;

default:

break;

}

return textRect;

}

- (CGRect)rectForText

{

return [self textRectForBounds:self.bounds limitedToNumberOfLines:self.numberOfLines];

}

-(void)drawTextInRect:(CGRect)requestedRect {

CGRect actualRect = [self textRectForBounds:requestedRect limitedToNumberOfLines:self.numberOfLines];

[super drawTextInRect:actualRect];

}

@end