ios 如何从 UIPickerView 获取选定的值

How To Get Selected Value From UIPickerView

提问by SJS

I know that with a UIDatePicker, you can use something like:

我知道使用 UIDatePicker，您可以使用以下内容：

NSDate *myDate = picker.date;

But I am using a UIPickerView in my view. How can i similarly get the value selected? Or do I have to setup didSelectRow type of method to do this?

但我在我看来使用 UIPickerView 。我怎样才能类似地获得选定的值？或者我是否必须设置 didSelectRow 类型的方法才能做到这一点？

Update: This code works for picker with 1 component:

更新：此代码适用于具有 1 个组件的选择器：

NSInteger row;
NSString *weightSelected;

row = [repPicker selectedRowInComponent:0];
weightSelected = [pickerArray objectAtIndex:row];

I tired this code for my picker with 2 components, but it is freezing:

我用 2 个组件为我的选择器使用了这段代码，但它冻结了：

NSInteger row1, row2;
NSString *weightSelected1;
NSString *weightSelected2;

row1 = [repPicker selectedRowInComponent:0];
row2 = [repPicker selectedRowInComponent:1];
weightSelected1 = [pickerArray objectAtIndex:row1];
weightSelected2 = [pickerArray objectAtIndex:row2];
NSString *weightSelected = [NSString stringWithFormat:@"%@.%@", weightSelected1, weightSelected2];

回答by SJS

You can get it in the following manner:

您可以通过以下方式获取它：

NSInteger row;
NSArray *repeatPickerData;
UIPickerView *repeatPickerView;

row = [repeatPickerView selectedRowInComponent:0];
self.strPrintRepeat = [repeatPickerData objectAtIndex:row];

回答by nh32rg

You can get the text of the selected item in any section of the picker using the same function that the pickerView does, from your custom ViewController class:

您可以使用与 pickerView 相同的功能从您的自定义 ViewController 类中获取选择器任何部分中所选项目的文本：

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

using the selected item

使用所选项目

[myPickerView selectedRowInComponent:0]

so to set the text of a label in a custom cell using the currently selected value from the 2nd section of myPickerView (a property of your view controller probably)

因此，使用 myPickerView 的第二部分中当前选择的值（可能是您的视图控制器的属性）在自定义单元格中设置标签的文本

[cell.label setText:[self pickerView:myPickerView titleForRow:[myPickerView selectedRowInComponent:1] forComponent:1]];

Just change both :1s to :2s, etc for each section

只需将每个部分的 :1s 更改为 :2s 等

回答by Harikrishnan

This is what I did:

这就是我所做的：

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {

    selectedEntry = [allEntries objectAtIndex:row];

}

The selectedEntryis a NSStringand will hold the currently selected entry in the pickerview. I am new to objective C but I think this is much easier.

该selectedEntry是NSString和将持有pickerview当前的选择项。我是目标 C 的新手，但我认为这要容易得多。

回答by drewag

You can access the selected row for a given component using the following method:

您可以使用以下方法访问给定组件的选定行：

- (NSInteger)selectedRowInComponent:(NSInteger)component

Otherwise, implementing the delegate function is the only other option.

否则，实现委托功能是唯一的其他选择。

回答by J-Dizzle

You will need to ask the picker's delegate, in the same way your application does. Here is how I do it from within my UIPickerViewDelegate:

您将需要以与您的应用程序相同的方式询问选择器的委托。以下是我在 UIPickerViewDelegate 中执行此操作的方法：

func selectedRowValue(picker : UIPickerView, ic : Int) -> String {

    //Row Index
    let ir  = picker.selectedRow(inComponent: ic);

    //Value
    let val = self.pickerView(picker,
                              titleForRow:  ir,
                              forComponent: ic);
    return val!;
}

回答by pkamb

Getting the selected title of a picker:

获取选择器的选定标题：

let component = 0
let row = picker.selectedRow(inComponent: component)
let title = picker.delegate?.pickerView?(picker, titleForRow: row, forComponent: component)

回答by maan89

       NSInteger SelectedRow;
                   SelectedRow = [yourPickerView selectedRowInComponent:0];
                   selectedPickerString = [YourPickerArray objectAtIndex:SelectedRow];
                   self.YourTextField.text= selectedPickerString;

    // if  you want to move pickerview to selected row then 
 for (int i = 0; I<YourPickerArray.count; i++) {
  if ([[YourPickerArray objectAtIndex:i] isEqualToString:self.YourTextField.text]) { 
[yourPickerView selectRow:i inComponent:0 animated:NO];
 }
}

回答by Dave DeLong

You have to use the didSelectRowdelegate method, because a UIPickerViewcan have an arbitrary number of components. There is no "objectValue" or anything like that, because that's entirely up to you.

您必须使用didSelectRow委托方法，因为 aUIPickerView可以有任意数量的组件。没有“objectValue”或类似的东西，因为这完全取决于你。

回答by cHELSEA

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
   weightSelected = [pickerArray objectAtIndex:row];
}

回答by Ahmad Alwisi

This is my answer

这是我的回答

- (IBAction)Result:(id)sender 
{
   self.statusLabel.text = DataSource[[pickerViewTool selectedRowInComponent:0]];

}