IOS艺术字及简单的图文混排

        NSString* alertText = [NSString stringWithFormat:@" 以下%d节课程（总课酬¥%.02lf）家长们尚未结课并评价，请尽快联系家长，否则无法获取课酬。",self.courseNum,self.totalPrice];
        NSMutableAttributedString* alertString = [[NSMutableAttributedString alloc]initWithString:alertText];
        NSRange totalRange = NSMakeRange(0, alertString.length);
        [alertString addAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:16.0],NSForegroundColorAttributeName:[UIColor themePinkColor]} range:totalRange];
　　　　//文字前边加一个图标
        NSTextAttachment* textAttachment = [[NSTextAttachment alloc]initWithData:nil ofType:nil];
        UIImage* alertIcon = [ UIImage imageNamed:@"lesson_icon26"];
        textAttachment.image = alertIcon;
        textAttachment.bounds = CGRectMake(0,-5, kAlertIconHeight, kAlertIconHeight);
        [alertString insertAttributedString:[NSAttributedString attributedStringWithAttachment:textAttachment] atIndex:0];
        self.alertLabel.attributedText = alertString;