接口部分
@interface UILabel (Extend)
/**
* 改变行间距
*/
+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space;
/**
* 改变字间距
*/
+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space;
/**
* 改变行间距和字间距
*/
+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace;
- (void)setAttributedTextWithFirstLineHeadIndent:(CGFloat)firstLineHeadIndent;
@end
实现部分
@implementation UILabel (Extend)
+ (void)changeLineSpaceForLabel:(UILabel *)label WithSpace:(float)space {
NSString *labelText = label.text;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:space];
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
label.attributedText = attributedString;
[label sizeToFit];
}
+ (void)changeWordSpaceForLabel:(UILabel *)label WithSpace:(float)space {
NSString *labelText = label.text;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(space)}];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
label.attributedText = attributedString;
[label sizeToFit];
}
+ (void)changeSpaceForLabel:(UILabel *)label withLineSpace:(float)lineSpace WordSpace:(float)wordSpace {
NSString *labelText = label.text;
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText attributes:@{NSKernAttributeName:@(wordSpace)}];
NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
[paragraphStyle setLineSpacing:lineSpace];
[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
label.attributedText = attributedString;
[label sizeToFit];
}
- (void)setAttributedTextWithFirstLineHeadIndent:(CGFloat)firstLineHeadIndent
{
if (self.text && ![self.text isEqualToString:@""] &&firstLineHeadIndent > 0) {
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
style.alignment = self.textAlignment;
style.lineBreakMode = self.lineBreakMode;
style.firstLineHeadIndent = firstLineHeadIndent;
NSAttributedString *attrText = [[NSAttributedString alloc] initWithString:self.text attributes:@{ NSParagraphStyleAttributeName : style}];
self.attributedText = attrText;
}
}
@end
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