Question

任何人都可以帮助我。我正在尝试在UIPickerview上实现多个选择（在iOS 7中）。很少有来自堆栈溢出的引用，我已经完成如下，

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

    UITableViewCell *cell = (UITableViewCell *)view;

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
        [cell setBackgroundColor:[UIColor clearColor]];
        [cell setBounds: CGRectMake(0, 0, cell.frame.size.width -20 , 44)];
        cell.tag = row;       
        cell.userInteractionEnabled = YES;

        UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(toggleSelection:)];
        singleTapGestureRecognizer.numberOfTapsRequired = 1;
        singleTapGestureRecognizer.delegate= self;
        [cell addGestureRecognizer:singleTapGestureRecognizer];
        [self.doorSelectionPickerView addGestureRecognizer:singleTapGestureRecognizer];
    }

    //TO DO FOR CHECKMARK    

    cell.textLabel.text = @"1";

    return cell;
}

尝试此操作后，它没有收到点击手势，因此不会调用toggleSelection方法。

注意：UIpickerview作为UITextField的输入视图

userSafeDoorTextfeild.inputView = [self doorSelectionPickerView];

Answer 1

我解决了这个问题，可以帮助陷入困境的人。

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:
 (NSInteger)row  forComponent:(NSInteger)component 
 reusingView:(UIView *)view {
if (cell == nil) {
    cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
    [cell setBackgroundColor:[UIColor clearColor]];
    [cell setBounds: CGRectMake(0, 0, cell.frame.size.width -20 , 44)];
    cell.tag = row;
    cell.userInteractionEnabled = YES;

    UITapGestureRecognizer *recognizer = [[UITapGestureRecognizer alloc]
                                          initWithTarget:self action:@selector(showTimePicker:)];
    [recognizer setNumberOfTapsRequired:1];
    [recognizer setDelegate:self];


    if(pickerView.tag == DOORSELECTION_PICKER_TAG){
        NSLog(@"its door selection category");
        *[pickerView addGestureRecognizer:recognizer];*
    }
}

 }

不是将点击手势添加到类范围选择器视图，而是在检查标记后将手势添加到viewForRow委托方法中返回的此方法选择器视图对象。

如何使用viewForRow委托接收UIPickerview的触摸？

1 个答案: