键盘出现时inputAccessoryView不调用

Question

我已经将InputAccessoryView添加到我的键盘消失。挺好的。但在一些ViewController中，它并没有出现。即使是这种方法也不会调用。

我有个按钮。当我单击该文本字段时，自动成为第一个响应程序。(当单击该按钮时，光标集中在textField上)键盘即将到来，但输入附件视图未出现。

我正在iOS 8.2设备上测试这个。这是我的密码

在viewDidload中

 // for search------------------
UIView *srchPadView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 20, 30)];
[srchtextbox setLeftView:srchPadView];
[srchtextbox setLeftViewMode:UITextFieldViewModeAlways];
srchtextbox.attributedPlaceholder=[[NSAttributedString alloc] initWithString:alertStrings.strSearch attributes:@{NSForegroundColorAttributeName: [UIColor colorWithRed:1 green:1 blue:1 alpha:0.6]}];
[srchtextbox setTextColor:[UIColor whiteColor]];
srchtextbox.delegate=self;

[[NSNotificationCenter defaultCenter]
 addObserver:self
 selector:@selector(textFieldTextDidChangeOneCI:)
 name:UITextFieldTextDidChangeNotification
 object:srchtextbox];

在textfield中更改方法

-(void)textFieldTextDidChangeOneCI:(NSNotification *)notification
 {

    isSearching=YES;
    [NSObject cancelPreviousPerformRequestsWithTarget:self
                                         selector:@selector(getSongs)
                                           object:nil];

    loading=YES;
    [mainactivityindicator startAnimating];
    songsArray=[[NSMutableArray alloc]init];
    songstable.hidden=YES;
    startRec=0;

    [self performSelectorInBackground:@selector(getSongs) withObject:nil];


}

然后

- (UIView *)inputAccessoryView {
if (!inputAccessoryView) {
    CGRect accessFrame = CGRectMake(0.0, 0.0, 320, 40);
    inputAccessoryView = [[UIView alloc] initWithFrame:accessFrame];
    inputAccessoryView.backgroundColor = [UIColor colorWithRed:70.0/255 green:70.0/255.0 blue:70.0/255.0 alpha:0.9];

    UIView *line=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 1)];
    [line setBackgroundColor:[UIColor colorWithRed:134.0/255.0 green:139.0/255.0 blue:143.0/255.0 alpha:1.0]];
    [inputAccessoryView addSubview:line];

    UIButton *compButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    compButton.frame = CGRectMake(260.0, 2, 60, 37.0);
    [compButton.titleLabel setTextAlignment:NSTextAlignmentCenter];
    [compButton setTitle: @"Done" forState:UIControlStateNormal];
    [compButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [compButton addTarget:self action:@selector(completeCurrentWord:)
         forControlEvents:UIControlEventTouchUpInside];
    [inputAccessoryView addSubview:compButton];



}
    return inputAccessoryView;
}

最后

-(IBAction)completeCurrentWord:(id)sender{
[self.view endEditing:YES];

}

但我的inputAccessoryView从来不打电话。为什么会这样呢。我该如何解决这个问题？请帮帮我。

谢谢

Answer 1

你需要

1. 重写方法inputAccessoryView并返回视图。
2. 覆盖方法：

    -(BOOL)canBecomeFirstResponder{
        return YES;
    }

3.当您需要输入附件视图时，请调用[self becomeFirstResponder];

提示:如果你想总是被展示出来

-(void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:animated];
    [self becomeFirstResponder];
}