pickerView

//如果不想用拉的宣告顯示資料位置，也在可在初始化這樣設定

//self.picker.dataSource = self;

//self.picker.delegate = self;

//顯示選取資料有幾欄
- (int)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

//顯示選取資料筆數
- (long)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return list1.count;
}

// 顯示選取資料
- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return [list1 objectAtIndex:row];
}

//顯示目前選取哪筆資料
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    NSLog(@"select:%@",[list1 objectAtIndex:row]);
}