如何避免用戶在UIDatePicker中選擇某個日期？

Question

我要提示用戶選擇從可可的UIDatePicker一個日期，但避免他選擇週日ANS週六，因爲我的目標是讓他們選擇日期預約

，最好的辦法應該禁用該日期，在minimumDate財產以同樣的方式，但我無法找到該怎麼做

Answer 1

你可以做這樣的事情：

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

執行情況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. 
} 

這樣，當在星期六或星期天挑選日期時，日期選擇器自動選擇週末後的星期一。

（代碼未經測試！）