UIPickerView 点击滚动和自定义行 UIViews

Posted 2023-02-24

【中文标题】UIPickerView 点击滚动和自定义行 UIViews

【英文标题】：UIPickerView tap to scroll & custom row UIViews

【发布时间】：2010-08-26 14:35:50

【问题描述】：

您可以通过滑动和点击选择带下方或上方的项目来滚动 UIPickerView。

您可以通过将 NSString 指定为标题或为每一行指定可重用的 UIViews 来填充 UIPickerView。

我注意到，当我从提供字符串切换到提供视图时，点击滚动不再起作用。这是预期的行为。我的视图是否应该将一些触摸事件转发给 UIPickerView？

谢谢

编辑：

这是我实现的代码示例：

// Creating the picker
screenPicker_ = [UIPickerView new];
screenPicker_.showsSelectionIndicator = YES;
screenPicker_.delegate = delegate_;
screenPicker_.dataSource = delegate_;
[self addSubview:screenPicker_];
[screenPicker_ release];

// Row view creation delegate
- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view

    PickerRowView *pickerRowView = (PickerRowView*)view;
    if(view == nil)
    
        pickerRowView = [[PickerRowView alloc] initWithFrame:CGRectMake(0, 0, pickerView.frame.size.width, PICKER_ROW_HEIGHT)];
    

    [pickerRowView SetTitle:@"some title"];

    return pickerRowView;


// initailizer of the PickerRowView class (an UIView subclass)
- (id)initWithFrame:(CGRect)frame 

    if ((self = [super initWithFrame:frame])) 
    
        CGFloat titleHeight = frame.size.height * CONTENT_TO_FRAME_RATIO;
        title_ = [[UILabel alloc] initWithFrame:CGRectMake(TITLE_X, (frame.size.height - titleHeight) / 2, frame.size.width, titleHeight)];
        [title_ setFont:[UIFont fontWithName:@"StainlessExt-Light" size:titleHeight]];
        title_.backgroundColor = [UIColor clearColor];
        [self addSubview:title_];
        [title_ release];

        self.userInteractionEnabled = NO;
    
    return self;

【参考方案1】：

将您的行视图的userInteractionEnabled 属性设置为NO 必须解决您的问题。

【参考方案2】：

在您的 PickerRowView 类中，定义以下方法：

- (void)didMoveToSuperview 
if ([[self superview] respondsToSelector:@selector(setShowSelection:)])

    [[self superview] performSelector:@selector(setShowSelection:) withObject:NO];
 

那应该去掉高光