UIPicker設置日期範圍

Question

可能重複：
UIDatePicker set Maximum date

我使用此代碼，不過去我設置的限制阻止用戶：鑑於沒有負載

：

NSDate *Date=[NSDate date]; 
[DatePickerForDate setMinimumDate:Date]; 
[DatePickerForDate setMaximumDate:[Date dateByAddingTimeInterval: 63072000]]; //time interval in seconds 

和此方法：

- (IBAction)datePickerChanged:(id)sender{ 
// When `setDate:` is called, if the passed date argument exactly matches the Picker's date property's value, the Picker will do nothing. So, offset the passed date argument by one second, ensuring the Picker scrolls every time. 
NSDate* oneSecondAfterPickersDate = [DatePickerForDate.date dateByAddingTimeInterval:1] ; 
if ([DatePickerForDate.date compare:DatePickerForDate.minimumDate] == NSOrderedSame) { 
    NSLog(@"date is at or below the minimum") ; 
    DatePickerForDate.date = oneSecondAfterPickersDate ; 
} 
else if ([DatePickerForDate.date compare:DatePickerForDate.maximumDate] == NSOrderedSame ) { 
    NSLog(@"date is at or above the maximum") ; 
    DatePickerForDate.date = oneSecondAfterPickersDate ; 
} 
} 

if語句中的代碼永遠不會被調用。爲什麼？

Answer 1

你不想結束our discussion over here?

首先，確保datePickerChanged當DatePickerForDate的值改變時被調用。