Question

这是我的第一篇文章，我对iOS编程很新。我正在使用xcode 4.3，这可能是一个简单的问题。我已经看了一下将键盘放在键盘上方的方法，上面有一个上一个/下一个按钮。当xcode使用界面构建器时，我发现了几个关于如何执行此操作的内容。但我找不到最新版本的xcode。所以我已经在互联网和Apple开发网站上找到了我所发现的东西，并提出了一些代码。唯一的是，它不起作用！我收到一个错误，表示使用inputAcessoryView分配给行上的readonly属性。我知道它可能很简单，但是当将代码从先前版本转移到新版本时，我很可能搞砸了。有人可以检查我的代码，让我知道我做错了什么。非常感谢。我已经包含了我的.h / .m文件

    #import <UIKit/UIKit.h>

    @interface keyboardViewController : UIViewController


    @property (retain, nonatomic) IBOutlet UIView *textField1;
    @property (retain, nonatomic) IBOutlet UIView *textField2;

    @property (nonatomic, retain) UIToolbar *keyboardToolbar;

    -(void)resignKeyboard:(id)sender;
    -(void)previousField:(id)sender;
    -(void)nextField:(id)sender;

    @end

执行力度

    #import "keyboardViewController.h"

    @interface keyboardViewController ()

    @end

    @implementation keyboardViewController
    @synthesize textField1;
    @synthesize textField2;
    @synthesize keyboardToolbar;

    - (void)viewDidLoad
    {
        [super viewDidLoad];

        if (keyboardToolbar == nil)
        {
            keyboardToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,                            self.view.bounds.size.width, 44)]; 

            UIBarButtonItem *previousButton = [[UIBarButtonItem alloc] initWithTitle:@"previous" 
                                                                               style:UIBarButtonItemStyleBordered
                                                                      target:self 
                                                                      action:@selector(previousField:)];
            UIBarButtonItem *nextButton = [[UIBarButtonItem alloc] initWithTitle:@"next" 
                                                                           style:UIBarButtonItemStyleBordered
                                                                          target:self 
                                                                          action:@selector(nextField:)];

            UIBarButtonItem *extraSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:(UIBarButtonSystemItemFlexibleSpace) target:nil action:nil];


            UIBarButtonItem *done = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:(UIBarButtonSystemItemDone) target:self action:@selector(resignKeyboard:)];



            [keyboardToolbar setItems:[[NSArray alloc] initWithObjects:previousButton, nextButton, extraSpace, done, nil]];

            textField1.inputAccessoryView  = keyboardToolbar;
            textField2.inputAccessoryView  = keyboardToolbar;


        }


    }

    -(void) resignKeyboard:(id)sender
    {
        if ([textField1 isFirstResponder])
            [textField1 resignFirstResponder];

        else if ([textField2 isFirstResponder])
        [textField2 resignFirstResponder];
    }

    -(void) previousField:(id)sender
    {
        if ([textField1 isFirstResponder])
            [textField2 becomeFirstResponder];

        else if ([textField2 isFirstResponder])
            [textField1 becomeFirstResponder];
    }


    -(void) nextField:(id)sender
    {
        if ([textField1 isFirstResponder])
            [textField2 becomeFirstResponder];

        else if ([textField2 isFirstResponder])
            [textField1 becomeFirstResponder];
    }


    - (void)viewDidUnload
    {
        [self setTextField1:nil];
        [self setTextField2:nil];
        [self setKeyboardToolbar:nil];
        [super viewDidUnload];
        // Release any retained subviews of the main view.
    }

    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
    }

    @end

Answer 1

@interface keyboardViewController : UIViewController<UITextFieldDelegate>


@property (retain, nonatomic) IBOutlet UITextField *textField1;
@property (retain, nonatomic) IBOutlet UITextField *textField2;

并在.m位置而不是此代码

        textField1.inputAccessoryView  = keyboardToolbar;
        textField2.inputAccessoryView  = keyboardToolbar;

粘贴这些代码

for (id view in self.view.subviews) {
    if ([view isKindOfClass:[UITextField class]]) {
        [(UITextField *)view setInputAccessoryView:keyboardToolbar];
    }
}

粘贴此代码

-(void) resignKeyboard:(id)sender{

         [self.view endEditing:YES];
}

而不是

-(void) resignKeyboard:(id)sender
    {
        if ([textField1 isFirstResponder])
            [textField1 resignFirstResponder];

        else if ([textField2 isFirstResponder])
        [textField2 resignFirstResponder];
    }

在viewDidLoad方法中添加此代码

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

和

-(void)nextField:(id)sender{

    if ([textField1 isFirstResponder]) {

        [textField2 becomeFirstResponder];
        [previousButton setEnabled:YES];
        [nextButton setEnabled:NO];
    }
}

-(void)previousField:(id)sender{

    if ([textField2 isFirstResponder]) {

        [textField1 becomeFirstResponder];
        [nextButton setEnabled:YES];
        [previousButton setEnabled:NO];
    }
}

-(void)keyboardWillShow:(id)sender{

    if ([textField2 isFirstResponder]) {

        [nextButton setEnabled:NO];
        [previousButton setEnabled:YES];
    }else if ([textField1 isFirstResponder]) {

        [nextButton setEnabled:YES];
        [previousButton setEnabled:NO];
    }
}

Answer 2

当您的文本字段类型为UIKeyboardTypeNumberPad时，即将添加“完成按钮”时，UIToolbar非常有用。这是因为它默认没有完成按钮。为此，您只需添加以下内容： -

    UIToolbar *boolbar = [UIToolbar new];
    boolbar.barStyle = UIBarStyleBlackTranslucent;
    [boolbar sizeToFit];


    UIBarButtonItem *leftBarButton =[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneBtnClicked)];

    NSArray *array = [NSArray arrayWithObjects:cancelleftBarButton, nil];
    [leftBarButton release];
    [boolbar setItems:array];

    textField_phnNumber.inputAccessoryView = boolbar;

//由selector

执行的方法

- （无效）doneBtnClicked {

[textField_phnNumber resignFirstResponder];

}

注意： - 如果您使用的是UITextField，请在textFieldDidBeginEditing委托方法中添加此内容。

Answer 3

此代码在键盘上方的UIToolbar的右侧侧创建“完成”按钮：

UIToolbar *tbAboveKeyboard = [[UIToolbar alloc] init];
tbAboveKeyboard.barStyle = UIBarStyleBlackTranslucent;
[tbAboveKeyboard sizeToFit];

UIBarButtonItem *flexibleSpaceLeft = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];

UIBarButtonItem *rightBarButton =[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(doneButtonClicked:)];

NSArray *array = [NSArray arrayWithObjects:flexibleSpaceLeft, rightBarButton, nil];
[rightBarButton release];
[tbAboveKeyboard setItems:array];

yourTextView.inputAccessoryView = tbAboveKeyboard;
[tbAboveKeyboard release];

...

- (void)doneButtonClicked:(id)sender
{
    [searchTextField resignFirstResponder];
}

在Xcode 4.3中将UIToolbar放在键盘上

3 个答案: