Question

我有一个UIPickerView。我想在pickerview的顶部有一个完成按钮，我想在点击完成按钮时关闭选择器视图。你可以帮帮我吗？

Answer 1

在您的视图中添加操作表，然后添加带有完成按钮的工具栏在操作表的顶部和下方将您的选择器添加到操作表在完成按钮单击下面写入方法以关闭操作表

[actionSheet dismissWithClickedButtonIndex:0 animated:YES];

actionSheet=[[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
    [actionSheet showInView:self.view];
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,320,40)];
[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];
    [cancelBtn release];
    UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
    [barItems addObject:flexSpace];
    [flexSpace release];
    UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(done_clicked:)];
    [barItems addObject:doneBtn];
    [doneBtn release];
    [pickerToolbar setItems:barItems animated:YES];
    [actionSheet addSubview:pickerToolbar];
    [barItems release];
    [pickerToolbar release];

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

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

Answer 2

您可以将工具栏用于相同目的。看看this link。这里，考虑相同的解决方案。希望对您有所帮助。感谢。

Answer 3

每个人都拿走了行动表，然后添加了按钮，但只是从视图中添加了uibutton并从超级视图中删除了方法。显示下面的例子，我尝试了这个代码成功。我认为这是非常有用的代码，不使用行动表

 -(void)parserDidEndDocument:(NSXMLParser *)parser { NSLog(@"the marray data is %@",marray); // [self showpicker1]; if (marray.count == 0) { UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"Error" message:@"NO DATA FOUND" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil]; [alert show]; }

[self showpicker1];
}

-(void)showpicker1 { //view1=[[UIView alloc] initWithFrame:CGRectMake(55, 59, 171, 80)]; //[self.view addSubview:view1]; pv = [[UIPickerView alloc] initWithFrame:CGRectMake(55,79,171,0)]; pv.delegate = self; pv.dataSource = self; pv.showsSelectionIndicator = YES; [self.view addSubview:pv]; done=[UIButton buttonWithType:UIButtonTypeRoundedRect]; [done setFrame:CGRectMake(55, 59, 171, 20)]; [done setTitle:@"DONE" forState:UIControlStateNormal]; [done addTarget:self action:@selector(dismiss) forControlEvents:UIControlEventTouchDown]; [self.view addSubview:done]; } -(void)dismiss { [pv removeFromSuperview]; [done removeFromSuperview]; }

如何在PickerView上添加一个按钮以及如何在单击该按钮时关闭PickerView？

3 个答案: