UILabelにコンテンツのサイズを計算する

2014年8月4日

1.UILable+LM.h

#import <UIKit/UIKit.h>

@interface UILabel (LM)

– (CGSize)contentSize;

@end
2.UILabel+LM.m

#import “UILabel+LM.h"

@implementation UILabel (LM)

– (CGSize)contentSize
{
NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineBreakMode = self.lineBreakMode;
paragraphStyle.alignment = self.textAlignment;

NSDictionary * attributes = @{NSFontAttributeName : self.font,
NSParagraphStyleAttributeName : paragraphStyle};

CGSize contentSize = [self.text boundingRectWithSize:self.frame.size
options:(NSStringDrawingUsesLineFragmentOrigin|NSStringDrawingUsesFontLeading)
attributes:attributes
context:nil].size;
return contentSize;
}

@end