objective-c - 有没有办法删除日期选择器的 "year"？

Question

我在 View 中有一个日期选择器，但我只希望它显示日期和月份，而不是年份，有没有办法去掉年份？

Answer 1

正如其他人所指出的:您需要一个人来创建自己的选择器，但实际上这并不困难。一个快速原型(prototype)，请注意，我使用第一个组件几天，第二个组件多年，这应该根据真实世界应用程序中的语言环境来制作:

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 2;
}

-(NSInteger)pickerView:pickerView numberOfRowsInComponent:(NSInteger)component
{
    NSUInteger number = 0;
    if (component == 1) {
        number = 12;
    } else {

        NSDateComponents *comps = [[NSCalendar currentCalendar] components:NSDayCalendarUnit | NSMonthCalendarUnit | NSYearCalendarUnit fromDate:[NSDate date]];

        NSUInteger month = [pickerView selectedRowInComponent:1]+1 ;
        NSUInteger actualYear = [comps year];

        NSDateComponents *selectMothComps = [[NSDateComponents alloc] init];
        selectMothComps.year = actualYear;
        selectMothComps.month = month;
        selectMothComps.day = 1;

        NSDateComponents *nextMothComps = [[NSDateComponents alloc] init];
        nextMothComps.year = actualYear;
        nextMothComps.month = month+1;
        nextMothComps.day = 1;

        NSDate *thisMonthDate = [[NSCalendar currentCalendar] dateFromComponents:selectMothComps];
        NSDate *nextMonthDate = [[NSCalendar currentCalendar] dateFromComponents:nextMothComps];

        NSDateComponents *differnce = [[NSCalendar currentCalendar]  components:NSDayCalendarUnit
                                                   fromDate:thisMonthDate
                                                     toDate:nextMonthDate
                                                    options:0];

        number = [differnce day];

    }

    return number;
}

-(void)pickerView:pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    if (component == 1) {
        [pickerView reloadComponent:0];
    }
}

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [NSString stringWithFormat:@"%d", row+1];
}

您可以在 GitHub 找到示例代码

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您在 GitHub 上找到的版本知道最喜欢的语言的月份名称