iOS删除线和下划线

@interface NSString (line)
//删除线
-(NSMutableAttributedString *)addPartionLineStr:(NSString *)str;
//下划线
-(NSMutableAttributedString *)addUnderLineStr:(NSString *)str;

@end

@implementation NSString (line)
//删除线
-(NSMutableAttributedString *)addPartionLineStr:(NSString *)str{
    
    NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:self
                                                                                attributes:@{NSStrikethroughStyleAttributeName : @(NSUnderlineStyleNone)}];
    [attrStr setAttributes:@{NSStrikethroughStyleAttributeName : @(NSUnderlineStyleSingle),
                             NSBaselineOffsetAttributeName : @0} range:[self rangeOfString:str]];
    return attrStr;
}
//下划线
-(NSMutableAttributedString *)addUnderLineStr:(NSString *)str{
    NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:str
                                                                                attributes:@{NSUnderlineStyleAttributeName : @(NSUnderlineStyleNone)}];
    [attrStr setAttributes:@{NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle)} range:[self rangeOfString:str]];
    return attrStr;
}

@end