iOS 字符串 价格删除线

    NSNumber* old = @(600);
    NSNumber* new = @(300);
    
    NSString* oldStr = [NSString stringWithFormat:@"￥%@ ", old];
    NSString* newStr = [NSString stringWithFormat:@"￥%@ ", new];
    
    NSAttributedString* oldAttrStr = [[NSAttributedString alloc] initWithString:oldStr attributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleNone), NSForegroundColorAttributeName:[UIColor blackColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:20]}];
    
    NSAttributedString* newAttrStr = [[NSAttributedString alloc] initWithString:newStr attributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleSingle), NSForegroundColorAttributeName:[UIColor grayColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:20]}];
    
    NSMutableAttributedString* full = [[NSMutableAttributedString alloc] initWithAttributedString:oldAttrStr];
    
    [full appendAttributedString:[[NSAttributedString alloc] initWithString:@" - " attributes:@{NSStrikethroughStyleAttributeName:@(NSUnderlineStyleNone), NSForegroundColorAttributeName:[UIColor grayColor], NSFontAttributeName:[UIFont boldSystemFontOfSize:20]}]];
    
    [full appendAttributedString:newAttrStr];
    
    [_label setAttributedText:full];