UIPickerView在ActionSheet上的奇怪行为

Question

- (void) actionsheetstart
{
    actionSheet=[[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
    [actionSheet showInView:self.view];
    UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 480, 32)];
    [pickerToolbar sizeToFit];
    pickerToolbar.barStyle = UIBarStyleBlackTranslucent;
    NSMutableArray *barItems = [[NSMutableArray alloc] init];

    UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonSystemItemCancel target:self action:@selector(cancel_clicked:)];
    [barItems addObject:cancelBtn];
    UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    [barItems addObject:flexSpace];
    UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(done_clicked:)];
    [barItems addObject:doneBtn];
    [pickerToolbar setItems:barItems animated:YES];
    [actionSheet addSubview:pickerToolbar];

    UIPickerView *picker = [[UIPickerView alloc] init];
    picker.frame = CGRectMake(0, 44, 320, 216);
    picker.delegate  = self;
    picker.dataSource = self;
    picker.showsSelectionIndicator = YES;
    [actionSheet addSubview:picker];
}

-(void)done_clicked:(id)sender
{
    [actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}
-(void)cancel_clicked:(id)sender
{
    [actionSheet dismissWithClickedButtonIndex:0 animated:YES];
}

由于某种原因，动作表很好，但UIPickerView和UIToolBar疯了。 我尝试将帧设置为-px但没有任何成功。什么似乎是问题？

非常感谢。

Answer 1

请勿在{{1​​}}内插入UIPickerView，否则您将无法以这种方式获得正确的行为。我的解决方案：

1. 子类UIActionSheet，实施方法UIButton，返回canBecomeFirstResponder:。
2. 在您的子类YES中实施inputView方法，返回UIButton。
3. （可选）在子类按钮中实现UIPickerView方法，以返回选择器上方的工具栏。
4. 点按时按下inputAccessoryView按钮。

Voila，当你按下按钮时，你的选择器会像键盘一样显示模式。

修改

MyButton.h

becomeFirstResponder:

MyButton.m

#import <UIKit/UIKit.h>

@interface MyButton : UIButton

@end