IOS使用視圖控制器和視圖（三）通過 使用 UIPickerView 來選擇數據

在storyboard中拖入Picker View控件

按住Ctrl鍵拖入代碼

在頭文件中加入data source和delegate協議，定義Picker值的Array

@interface Picking_Values_with_UIPickerViewViewController
: UIViewController 
{
	NSArray *PickerData;
	NSArray1 *PickerData1;
}

在viewDidLoad方法中添加

    self.myPicker.dataSource = self;
    self.myPicker.delegate = self;

設置Picker中的值的Array

NSArray *dataArray = [[NSArray alloc]initWithObjects:@"你", @"我",@"他",nil];
NSArray *dataArray1 = [[NSArray alloc]initWithObjects:@"you", @"me",@"he",nil]; 

設置Picker中的值

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    NSInteger result = 0;
    if ([pickerView isEqual:self.myPicker]) {
        result =2;            //2列
    }
    return result;
}

 -(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {     if ([pickerView isEqual:self.myPicker])     {         if (component == 0)         {             return [pickerData count];         }         else         {             return [pickerData1 count];         }     }     return 0; } 

得到的效果如下圖：

獲取選擇的值：

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    NSString *result = nil;
    if ([pickerView isEqual:self.myPicker]) {
        result = [NSString stringWithFormat:@"Row %ld",(long)row];
    }
    if (component == 0) {
        return [pickerData objectAtIndex:row];
    }
    else
{
    return [pickerData1 objectAtIndex:row];
}