如何避免用户在UIDatePicker中选择某个日期？

Question

我要提示用户选择从可可的UIDatePicker一个日期，但避免他选择周日ANS周六，因为我的目标是让他们选择日期预约

，最好的办法应该禁用该日期，在minimumDate财产以同样的方式，但我无法找到该怎么做

Answer 1

你可以做这样的事情：

UIDatePicker *datePicker = [[UIDatePicker alloc] init]; 
[datePicker addTarget:self action:@selector(dateChanged:) forControlEvent:UIControlEventValueChanged]; 

执行情况dateChanged：

- (void)dateChanged:(id)sender { 
    UIDatePicker *datePicker = (UIDatePicker *)sender; 
    NSDate *pickedDate = datePicker.date; 

    NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; 
    NSDateComponents *weekdayComponents = [gregorian components:NSWeekdayCalendarUnit fromDate:pickedDate]; 
    NSInteger weekday = [weekdayComponents weekday]; 
    [gregorian release]; 

    if (weekday == 1 || weekday == 7) { // Sunday or Saturday 
    NSDate *nextMonday = nil; 
    if (weekday == 1) 
     nextMonday = [pickedDate dateByAddingTimeInterval:24 * 60 * 60]; // Add 24 hours 
    else 
     nextMonday = [pickedDate dateByAddingTimeInterval:2 * 24 * 60 * 60]; // Add two days 

    [datePicker setDate:nextMonday animated:YES]; 

    return; 
    } 

    // Do something else if the picked date was NOT on Saturday or Sunday. 
} 

这样，当在星期六或星期天挑选日期时，日期选择器自动选择周末后的星期一。

（代码未经测试！）