UIDatePicker 只显示年和月滚轮

今天在做项目的时候有一块设计的是选择日期,但是只精确到月.
但是OC中UIDatePicker的mode选项里并没有精确到月的选项,所以就要自定义一个UIDatePicker.
当时想到的解决方案有两种:
第一种是直接用pickerview来代替UIDatePicker.自定义年限和月份.
第二种是利用view的layer.masksToBounds = YES 属性来操作.创建两个UIDatePicker 一个只显示年,一个只显示月.
我这里显示的UIDatePicker的大小是cgsize(300,100)
其中年份的显示在0-120,月份的显示是在115-195.
还有就是滚轮中间的两条线 在高度是100的情况下 第一条线的y坐标是32 第二条线y坐标是67 高度都为1 颜色为[UIColor colorWithRed:231/255.0 green:231/255.0 blue:231/255.0 alpha:1];
大家可以根据需要按照比例进行计算 显示的范围和线的高度

        UIView *pickerBGView = [[UIView alloc] initWithFrame:CGRectMake(16, CGRectGetMaxY(applyTimeLabel.frame), 120, 100)];
        pickerBGView.layer.masksToBounds = YES;
        [self.whiteBGView addSubview:pickerBGView];
        
        
        self.datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 300, 100)];
        self.datePicker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
        self.datePicker.datePickerMode = UIDatePickerModeDate;

        //监听DataPicker的滚动
        [self.datePicker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged];
        [pickerBGView addSubview:self.datePicker];
        
        
        UIView *pickerMonthBGView = [[UIView alloc] initWithFrame:CGRectMake(self.whiteBGView.frame.size.width-100, CGRectGetMaxY(applyTimeLabel.frame), 80, 100)];
        pickerMonthBGView.layer.masksToBounds = YES;
        [self.whiteBGView addSubview:pickerMonthBGView];
        
        
        self.monthDatePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(-115, 0, 300, 100)];
        self.monthDatePicker.locale = [NSLocale localeWithLocaleIdentifier:@"zh"];
        self.monthDatePicker.datePickerMode = UIDatePickerModeDate;
        //监听DataPicker的滚动
        [self.monthDatePicker addTarget:self action:@selector(dateChange:) forControlEvents:UIControlEventValueChanged];
        [pickerMonthBGView addSubview:self.monthDatePicker];
        
        self.lineView1 = [[UIView alloc] initWithFrame:CGRectMake(16, CGRectGetMaxY(applyTimeLabel.frame)+32, self.whiteBGView.frame.size.width-32, 1)];
        self.lineView1.backgroundColor = LineColor;
        [self.whiteBGView addSubview:self.lineView1];
        
        self.lineView2 = [[UIView alloc] initWithFrame:CGRectMake(16, CGRectGetMaxY(applyTimeLabel.frame)+67, self.whiteBGView.frame.size.width-32, 1)];
        self.lineView2.backgroundColor = LineColor;
        [self.whiteBGView addSubview:self.lineView2];

- (void)dateChange:(UIDatePicker *)datePicker {
    
    NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
    
    //设置时间格式
    formatter.dateFormat = @"yyyy";
    NSDateFormatter *formatterMonth = [[NSDateFormatter alloc] init];
    
    //设置时间格式
    formatterMonth.dateFormat = @"MM";
    self.dateStr = [NSString stringWithFormat:@"%@%@",[formatter  stringFromDate:self.datePicker.date],[formatterMonth  stringFromDate:self.monthDatePicker.date]];
    NSLog(@"%@",self.dateStr);
}