键盘存在时 UIViewController 向上移动答案

【问题标题】：UIViewController move up when keyboard present键盘存在时 UIViewController 向上移动
【发布时间】：2014-04-29 04:02:16
【问题描述】：

我有一个带有文本字段的 uiviewcontroller。单击底部文本字段时，该字段被键盘覆盖，当您单击文本字段时，如何使其“向上滚动”。或者只是拥有它，以便 uiviewcontroller 可以滚动

【问题讨论】：

Google“当键盘出现时 UIViewController 向上移动”

标签： objective-c uiviewcontroller

【解决方案1】：

尝试将视图的所有文本字段放在滚动视图中，然后使视图控制器符合 UITextFieldDelegate 和 UINavigationControllerDelegate。

在 viewController.m 中定义以下方法

-(IBAction)textFieldDidBeginEditing:(UITextField *)sender // connect all textfields in your view to this method
{
    sender.delegate = self;
}
//called when UIKeyboardDidShowNotification is sent.
-(void)keyboardWasShown:(NSNotification *)aNotification
{
    NSDictionary * info =   [aNotification userInfo];
    CGSize  kbSize  =   [[info objectForKey:UIKeyboardFrameBeginUserInfoKey]CGRectValue].size;
    [self.scrollView setContentOffset:CGPointMake(0, kbSize.height) animated:YES];

}
// Called when the UIKeyboardWillHideNotification is sent,method is called when the keyboard is closed. It returns the scroll view to its original position.
- (void)keyboardWillBeHidden:(NSNotification*)aNotification
{
    [self.scrollView setContentOffset:CGPointMake(0, 0) animated:YES];
}

//This method is called when you have finished editing a text field.
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    return [textField resignFirstResponder];
}

把它放在你的 viewDidLoad 中：

- (void)viewDidLoad
{
    [super viewDidLoad];        
    // Do any additional setup after loading the view.
    self.scrollView.scrollEnabled = YES;
    self.automaticallyAdjustsScrollViewInsets = YES;
}

这可能会奏效...... HTH :)

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