ios - UIDatePicker set minimum and maximum time

Question

I've got a UIDatePicker with the time only and I need a possibility to set the minimum and the maximum hour is showed. For example, I need it to start at 6 hours and finish at 15 hrs. Is it possible to perform this with UIDatePicker?

Answer 1

1) 使用此函数检索最小和最大日期

func getTimeIntervalForDate()->(min : Date, max : Date){

let calendar = Calendar.current
var minDateComponent = calendar.dateComponents([.hour], from: Date())
minDateComponent.hour = 09 // Start time


let formatter = DateFormatter()
formatter.dateFormat = "h:mma"
let minDate = calendar.date(from: minDateComponent)
print(" min date : \(formatter.string(from: minDate!))")

var maxDateComponent = calendar.dateComponents([.hour], from: date)
maxDateComponent.hour = 17 //EndTime



let maxDate = calendar.date(from: maxDateComponent)
print(" max date : \(formatter.string(from: maxDate!))")



return (minDate!,maxDate!)
}

2）将这些日期分配给您的pickerview

func createPickerView(textField : UITextField, pickerView : UIDatePicker){
    pickerView.datePickerMode = .time
    textField.delegate = self
    textField.inputView = pickerView
    let dates = getTimeIntervalForDate()

    pickerView.minimumDate = dates.min
    pickerView.maximumDate = dates.max
    pickerView.minuteInterval = 30
    pickerView.addTarget(self, action: #selector(self.datePickerValueChanged(_:)), for: UIControlEvents.valueChanged)
}

而已 ：）

Answer 2

只需使用这个：

datePicker.maximumDate = myMaxDate;
datePicker. minimumDate = myMinDate;

其中 myMaxDate 和 myMinDate 是NSDate对象

Answer 3

至于我的问题，答案maximumDate不是minimumDate我想要的。也许我的解决方案不是那么清晰和正确，但对我来说效果很好。我已经改变了UIDatePickerwith UIPickerView，为它写了一个单独的代表：

@interface CHMinutesPickerDelegate () <UIPickerViewDelegate, UIPickerViewDataSource>

@property (nonatomic, strong) NSArray *minutesArray;

@end

@implementation CHMinutesPickerDelegate

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:       (NSInteger)component {
    return [self.minutesArray count];
}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
    return [self.minutesArray objectAtIndex: row];
}

- (NSArray *)minutesArray {
    if (!_minutesArray) {
        NSMutableArray *temporaryMinutesArray = [NSMutableArray array];
        for (int i = 0; i < 6; i++) {
            for (int j = 0; j < 2; j++) {
                [temporaryMinutesArray addObject: [NSString stringWithFormat: @"%i%i", i, j * 5]];
            }
        }
    _minutesArray = temporaryMinutesArray;
}
    return _minutesArray;
}

返回数组：{ “ minutesArray05”、“10”...等}。这是自定义分钟选择器的示例，您可以为小时等编写相同的内容，选择您自己的最大值和最小值。这对我来说很好。