ios - 取消按钮出现但完成按钮未出现在 uitoolbar 中

Question

我已经编写了下面的代码来沿着 uitoolbar 在弹出窗口中显示日期选择器。
我可以看到取消按钮，但看不到完成按钮。

如果我删除 flexspace 的代码，则会出现完成按钮，但我需要将完成按钮放在最右边的位置，但它位于取消按钮旁边。

我该如何解决这个问题？提前致谢。

    UIViewController* popoverContent = [[UIViewController alloc] init]; //ViewController

    UIView *popoverView = [[UIView alloc] init];   //view
    popoverView.backgroundColor = [UIColor blackColor];

     datePicker=[[UIDatePicker alloc]init];//Date picker
    datePicker.frame=CGRectMake(0,44,320, 216);
    datePicker.datePickerMode = UIDatePickerModeDate;
    [datePicker setMinuteInterval:5];
    [datePicker setTag:10];
    [datePicker addTarget:self action:@selector(Result) forControlEvents:UIControlEventValueChanged];
    [popoverView addSubview:datePicker];

    popoverContent.view = popoverView;
    popoverController = [[UIPopoverController alloc] initWithContentViewController:popoverContent];
    popoverController.delegate=self;



    [popoverController setPopoverContentSize:CGSizeMake(320, 264) animated:NO];
    [popoverController presentPopoverFromRect:self.uitext.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES];//tempButton.frame where you need you can put that frame




//    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];
//  
//    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];
//    




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


    UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,self.view.bounds.size.width,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];

    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];
        [popoverView addSubview:pickerToolbar];

    [self.uitext resignFirstResponder];

Answer 1

试试这段代码:-

UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,self.view.bounds.size.width,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];

    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];

    [popoverView addSubview:pickerToolbar];

希望对你有帮助

编辑:-

在 [pickerToolbar setItems:barItems animated:YES]; 下方添加此行:-

pickerToolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleRightMargin;

并注释[pickerToolbar sizeToFit];行

所以你的代码将是

 UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,self.view.bounds.size.width,44.0)];
    //[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];

    pickerToolbar.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleRightMargin;
    [popoverView addSubview:pickerToolbar];