Question

所以我想要的是在PickerView中为我的行制作单独的颜色，但我真的不知道如何做到这一点。知道如何制作单独的文字颜色也很酷。感谢。

Answer 1

因此，如果您正在查看UIPickerView datasource，您会找到以下方法：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;

我猜您可以使用它来修改pickerView中的视图，方法是处理以下内容：

发起您的pickerView

在viewDidLoad例如：

UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, self.view.frame.size.height / 4, self.view.frame.size.width, self.view.frame.size.height / 2)];
pickerView.delegate = self;
pickerView.dataSource = self;

[self.view addSubview:pickerView];

调用所需的方法并进行更改：

示例：

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UIView *customRow = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 30)];
switch (row) {
    case 0:
        customRow.backgroundColor = [UIColor redColor];
        return customRow;
        break;

    case 1:
        customRow.backgroundColor = [UIColor orangeColor];
        return customRow;

    case 2:
        customRow.backgroundColor = [UIColor yellowColor];
        return customRow;

    case 3:
        customRow.backgroundColor = [UIColor greenColor];
        return customRow;

    case 4:
        customRow.backgroundColor = [UIColor blueColor];
        return customRow;

    case 5:
        customRow.backgroundColor = [UIColor purpleColor];
        return customRow;

    default:
        return nil;
        break;
    }
}

不要忘记实施中所需的方法：

在您的控制器中：

#pragma mark: UIPickeView datasource

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
    return 1;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return 6;
}

PickerView为行创建单独的颜色

1 个答案: