UITextView和UIPickerView都有自己的UIToolbar

Question

我想在我自己的應用程序中復制Safari在iPhone上的表單行為。 如果您在Web表單中輸入數據，您將在UIKeyboardView上方獲得單獨的UIToolbar（上一個，下一個，完成）。 選擇一個選項也是一樣的：你在UIPickerView上面得到了相同的UIToolbar。

我正在尋找演示/ sourcode / ideas如何實現這一點。 我會使用該工具欄和textview / pickerview創建自己的子視圖嗎？ 有更優雅的方式嗎？ 尤其是利用UITextfield成為第一個響應者的東西？

Answer 1

所以我創建了一個UIViewCOntroller子類來管理它。

在那我寫這個功能添加。

-(void) addToViewWithAnimation:(UIView *) theView
{
    UIView* myview = self.view;
    CGRect frame = myview.frame;
    frame.origin.y = 420;
    myview.frame = frame;

    UIView* bgView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 420)];
    bgView.backgroundColor = [UIColor blackColor];
    bgView.alpha = 0.6;
    backgroundView = bgView;
    [theView addSubview: bgView];  // this adds in the dark background

    [theView addSubview:self.view]; // this adds in the pickerView with toolbar.
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5];  
    frame = myview.frame;
    frame.origin.y = 420 - frame.size.height;
    myview.frame = frame;

    [UIView commitAnimations];
 }

然后我在IB中創建了視圖，這是我的類Header在結束時的樣子。 （視圖上還有一個UI工具欄，我在Controller中沒有對它的引用）

@interface PropertyPickerController : UIViewController {
    IBOutlet UIPickerView* Picker;
    IBOutlet UIButton* DoneButton;
    IBOutlet UIButton* CancelButton;
    UIView* backgroundView;
    NSArray* SimpleObjects;
    id PickerObjectDelegate;
    SEL PickerObjectSelector;
}

然后隱藏我使用的視圖。

-(void) removeFromSuperviewWithAnimation
{

    UIView* myview = self.view;
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(AnimationDidStop:)];
    [UIView setAnimationDuration:0.5];  
    // set fram below window.   
    CGRect frame = myview.frame;
    frame.origin.y = 420;
    myview.frame = frame;
    backgroundView.alpha = 0;  //fades shade to nothing
    [UIView commitAnimations];
}

-(void) AnimationDidStop:(id) object
{
    [self.view removeFromSuperview];  //removes view after animations.
    [backgroundView removeFromSuperview];
}

最后但並非最不重要的是選擇器的所有委托函數。

    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
    {
        FBSimpleObject* object = (FBSimpleObject*)[SimpleObjects objectAtIndex:row];
        return object.Name;
    }

    - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
    {   
    }
    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
    { return 1;}

    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
    {
        return [SimpleObjects count];
    }

    - (IBAction)CancelButtonClick
    {
            [self removeFromSuperviewWithAnimation];
    }
    - (IBAction)DoneButtonClick
    {   
//This performs a selector when the done button is clicked, makes the controller more versatile.
if(PickerObjectDelegate && PickerObjectSelector)
        {
            NSMethodSignature* signature = [PickerObjectDelegate methodSignatureForSelector:PickerObjectSelector];  
            NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
            [invocation setTarget:PickerObjectDelegate];
            [invocation setSelector:PickerObjectSelector];
            [invocation setArgument:&object atIndex:2];
            [invocation retainArguments];
            [invocation invoke];
        }
    }

這就是你如何使用ToolBar。 基本上我使用與ViewController子類相同的概念，我不使用標准推視圖或模態顯示選項。 （這里的示例實際上將文本框和工具欄放在鍵盤頂部。

@interface BugEditCommentController：UIViewController {UITextView * Comment; UIToolbar *工具欄; } - （void）addToViewWithAnimation：（UIView *）theView;

要激活此視圖，通常會調用[object becomeFirstResponder]; 因此，如果將其添加到視圖Controller構造函數中，您需要做的就是調用[object becomeFirstResponder];

 NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
     [nc addObserver:self selector:@selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
     [nc addObserver:self selector:@selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];

abd如果在控制器上實現此方法（在上面的代碼中定義）

-(void) keyboardWillShow:(NSNotification *) note
{
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];

    CGRect toolbarFrame  = Toolbar.frame;
    CGRect keyboardFrame;
    CGPoint keyboardCenter;
    [[note.userInfo valueForKey:UIKeyboardCenterEndUserInfoKey] getValue:&keyboardCenter];
    [[note.userInfo valueForKey:UIKeyboardBoundsUserInfoKey] getValue: &keyboardFrame];

    //CGRect toolbarRect = Toolbar.center;
    toolbarFrame.origin.y= keyboardCenter.y - ((keyboardFrame.size.height/2) + (toolbarFrame.size.height));
    Toolbar.frame = toolbarFrame;
    [UIView commitAnimations];

}

-(void) keyboardWillHide:(id) object
{

//you could call [self removeFromSuperviewHere];
}

-(void) removeFromsuperViewWithAnimation
{
    [Comment resignFirstResponder];
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDidStopSelector:@selector(AnimationDidStop:)];

    CGRect frame = Toolbar.frame;
    frame.origin.y = 480;
    Toolbar.frame = frame;

    [self.view viewWithTag:1].alpha = 0;  //fade transparent black background to clear.
    [UIView commitAnimations];

}
-(void)AnimationDidStop:(id) object
{
    [self.view removeFromSuperview];
}

希望其他信息有所幫助。

Answer 2

我也在尋找這個問題的解決方案。

我發現這是最好的解決方案，您可以使用此SCKit添加工具欄以根據需要關閉UIPickerView或UIDatePicker。

以下是github鏈接： https ： //github.com/scelis/SCKit/tree/

玩得開心！