Question

我用三个组件手动创建了一个UIPickerView。我想在component1中显示从1到100的数字。我该如何以编程方式完成？

Answer 1

我猜你已经实现了方法

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 3;
}

和

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

    if (component == 1 )
    {
        return [NSString stringWithFormat:@"%d",(row+1)];
    }

    return @"";//required elements
}

Answer 2

<。>文件中的

NSMutableArray *data ;

-

data = [NSMutableArray alloc] init];
for (int i=1; i<=100; i++){
     [data addObject:[NSString stringWithFormat:@"%d",i];
}

//这将在您的数组中添加1-100个值（数据）然后实现UIPickerViewDelegate

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView {

return 1;
}
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {

return [data count];
}
- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [data objectAtIndex:row];
}

Answer 3

使用以下代码可以帮助您

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
    if(component==1)
    return 100;
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    if(component==1)
    return [NSString stringWithFormat:@"%i",row+1];

}

Answer 4

这是一个快速回答（只是通过）。使用数组存储值。使用某种循环快速添加值1-1000。使用类似的东西来获得价值：

-(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:   (NSInteger)component{
 return [component1Array objectAtIndex: row];
}

如何以编程方式向选择器视图添加1-100个数字？

4 个答案: