1.建UILabel分类
#import <UIKit/UIKit.h>
@interface UILabel (extension)
/**
* 设置字间距
*/
- (void)setColumnSpace:(CGFloat)columnSpace;
/**
* 设置行距
*/
- (void)setRowSpace:(CGFloat)rowSpace;
@end
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#import "UILabel+extension.h"
#import <CoreText/CoreText.h>
@implementation UILabel (extension)
- (void)setColumnSpace:(CGFloat)columnSpace
{
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
//调整间距
[attributedString addAttribute:(__bridge NSString *)kCTKernAttributeName value:@(columnSpace) range:NSMakeRange(0, [attributedString length])];
self.attributedText = attributedString;
}
- (void)setRowSpace:(CGFloat)rowSpace
{
self.numberOfLines = 0;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];
//调整行距
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
paragraphStyle.lineSpacing = rowSpace;
paragraphStyle.baseWritingDirection = NSWritingDirectionLeftToRight;
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [self.text length])];
self.attributedText = attributedString;
}
@end
2.在ViewController调用
#import "ViewController.h"
#import "UILabel+extension.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *label;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.label.backgroundColor = [UIColor orangeColor];
self.label.text = @"12dhjskafheuwfhsakfb12dhjskafheuwfhsakfb12dhjskafheuwfhsakfb12dhjskafheuwfhsakfb12dhjskafheuw";
//当设置了UILabel的attributedText属性时textAlignment会失效 可以通过NSMutableParagraphStyle的baseWritingDirection这个属性来实现
self.label.textAlignment = NSTextAlignmentLeft;
self.label.numberOfLines = 0;
[self.label setColumnSpace:5];
[self.label setRowSpace:20];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
