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我有 uiscrollview，2 个 textviewfields，我阅读了所有关于键盘隐藏 textview 的帖子并尝试了很多方法，但它仍然隐藏了它。

我的代码是这样的：ViewController.h

@property(nonatomic,retain) IBOutlet UITextView *campaignTitle;
@property (weak, nonatomic) IBOutlet UITextView *campaignDescription;
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property UITextView *activeTextView;

视图控制器.m

@synthesize campaignTitle;
@synthesize campaignDescription;
@synthesize scrollView;
@synthesize activeTextView;

#define SCROLLVIEW_CONTENT_HEIGHT 460
#define SCROLLVIEW_CONTENT_WIDTH  320

- (void)viewDidLoad
{
 [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWasShown:)
                                                 name:UIKeyboardDidShowNotification
                                               object:nil];

    [[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(keyboardWillHide:)
                                                 name:UIKeyboardWillHideNotification
                                               object:nil];
    scrollView.contentSize=CGSizeMake(0, self.view.frame.origin.y+self.view.frame.size.height+50);
    [super viewDidLoad];
}

- (BOOL) textViewShouldBeginEditing:(UITextView *)textView
{
    textView.text = @"";
    self.activeTextView = textView;
    return YES;
}

- (BOOL) textViewShouldEndEditing:(UITextView *)textView
{
     self.activeTextView = nil;
    return YES;
}

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    if([text isEqualToString:@"\n"])
        [textView resignFirstResponder];
    return YES;
}

- (void)keyboardWasShown:(NSNotification *)notification
{   
    // Step 1: Get the size of the keyboard.
    CGSize keyboardSize = [[[notification userInfo] objectForKey:UIKeyboardFrameBeginUserInfoKey] CGRectValue].size;
    // Step 2: Adjust the bottom content inset of your scroll view by the keyboard height.
    UIEdgeInsets contentInsets = UIEdgeInsetsMake(0.0, 0.0, keyboardSize.height, 0.0);
    scrollView.contentInset = contentInsets;
    scrollView.scrollIndicatorInsets = contentInsets;
    // Step 3: Scroll the target text field into view.
    CGRect aRect = self.view.frame;
    aRect.size.height -= keyboardSize.height;
    if (!CGRectContainsPoint(aRect, activeTextView.frame.origin) ) {
        CGPoint scrollPoint = CGPointMake(0.0, activeTextView.frame.origin.y - (keyboardSize.height-15));
        [scrollView setContentOffset:scrollPoint animated:YES];
    }
}

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

    UIEdgeInsets contentInsets = UIEdgeInsetsZero;
    scrollView.contentInset = contentInsets;
    scrollView.scrollIndicatorInsets = contentInsets;
}

- (IBAction)dismissKeyboard:(id)sender
{
    [self.activeTextView resignFirstResponder];
}

有来自滚动视图和活动标题、活动描述的委托。

怎么了？为什么键盘仍然隐藏底部的uitextview？您可能看到的额外代码是支持 UITextView 中的 Return 按钮

4

2 回答 2

2

或使用TPKeyboardAvoiding。它工作得很好，而且很容易设置：

  1. 将 UIScrollView 添加到视图控制器的 xib
  2. 将滚动视图的类设置为 TPKeyboardAvoidingScrollView（仍在 xib 中，通过身份检查器）
  3. 将所有控件放在该滚动视图中

它还自动连接键盘上的“下一步”按钮以切换文本字段。

于 2014-02-12T22:22:11.597 回答
1

确保您的 UITextFields 实际上位于情节提要内的 UIScrollView 内，并且不会意外放置在其下方的 UIView 上。

setContentOffset 应该做一些事情，即使它不是预期的效果。由于它似乎什么也没做，我怀疑您的 UITextFields 不是它的子视图，或者您的 UIScrollView 没有在界面构建器中连接。

于 2012-09-10T20:49:30.380 回答