UIPicker设置日期范围

Question

可能重复：
UIDatePicker set Maximum date

我使用此代码，不过去我设置的限制阻止用户：鉴于没有负载

：

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语句中的代码永远不会被调用。为什么？

Answer 1

你不想结束our discussion over here?

首先，确保datePickerChanged当DatePickerForDate的值改变时被调用。