Ios 对两个文本字段使用相同的UIDatePicker
我有两个文本字段,fromdate和todate。如何从同一个日期选择器中获取不同的日期。我尝试了一些方法,结果在日期更改时在两个文本字段中获取相同的日期Ios 对两个文本字段使用相同的UIDatePicker,ios,objective-c,xcode,uitextfield,uidatepicker,Ios,Objective C,Xcode,Uitextfield,Uidatepicker,我有两个文本字段,fromdate和todate。如何从同一个日期选择器中获取不同的日期。我尝试了一些方法,结果在日期更改时在两个文本字段中获取相同的日期 -(IBAction)dateValueChanged:(id)sender { UIDatePicker *picker = (UIDatePicker *)sender; NSDate *dateSelected1 = [picker date]; NSDate *dateSelected2
-(IBAction)dateValueChanged:(id)sender
{
UIDatePicker *picker = (UIDatePicker *)sender;
NSDate *dateSelected1 = [picker date];
NSDate *dateSelected2 = [picker date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
self.fromTextField.text = [dateFormatter stringFromDate:dateSelected1];
self.toTextField.text = [dateFormatter stringFromDate:dateSelected2];
}
您可以为两个TextFields实现
UITextFieldDelegate
协议TextFieldDiBeginediting:
方法,同时为每个TextField设置标记
属性,以便它们易于识别
然后,当调用textfielddibeginediting:
时,您可以读取已开始编辑的textfield的标记,并将其设置为全局值,以便找出日期选择器应更改的textfield。。例如:
- (void)textFieldDidBeginEditing:(UITextField *)textField {
someGlobalNSInteger = textField.tag; //the current text field tag is now globally set
}
-(IBAction)dateValueChanged:(id)sender {
UIDatePicker *picker = (UIDatePicker *)sender;
NSDate *dateSelected1 = [picker date];
//NSDate *dateSelected1 = [picker date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
//self.fromTextField.text = [dateFormatter stringFromDate:dateSelected1];
//self.toTextField.text = [dateFormatter stringFromDate:dateSelected2];
UITextField *activeTextField = (UITextField*)[self viewWithTag:someGlobalNSInteger]; //gets text field what is currently being edited
[activeTextField setText:[dateFormatter stringFromDate:dateSelected1]];
}
然而,如果你不允许文本字段是可编辑的(因此它不能打开键盘),你可能需要一些其他的方法来计算哪个文本字段应该得到更新的日期,但我将留给你
希望它有帮助实现这一点的最佳方法是使用UITextField中提供的inputview属性。使用Outlet或programming初始化日期选择器一次,并在textfield的委托方法“textFieldDidBeginEditing:”中将其指定为inputView。对于分配日期,在实际将inputview分配给textfield之前,您可以使用自己的业务逻辑。一种更优雅的实现方法,无需
UITextFieldDelegate
和textFieldDidBeginEditing:
只是检查一下
textField.tag为int,将其分配给NSInteger时会显示警告。
- (IBAction)dateValueChanged:(id)sender
{
NSDate *dateSelected = [picker date];
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
if ([firstTextField isFirstResponder])
{
firstTextField.text = [dateFormatter stringFromDate:dateSelected];
}
else if ([self.endTextField isFirstResponder])
{
secondTextField.text = [dateFormatter stringFromDate:dateSelected];
}
}