UISearchBar CGContext ERROR

问题描述

在 - （BOOL）searchBarShouldBeginEditing之后，我有一个视图中的UISearchBar ：（UISearchBar *）searchBar

将其发送到控制台：

它重复相同的错误。我想知道究竟是什么问题？

我相信有一个 NULL 上下文，但它与一个UISearchBar ？
tnx。

解决方案

这是苹果正在开发的一个已知问题。

请在这里查看：

编辑：对于那些在textfield有问题的人应该帮助你：

   - （IBAction）addEntryTapped：（id）sender 
 
 {
 
 [_editorTextView resignFirstResponder]; 
 [self saveTextChanges]; 
 [self dismissPopovers]; 
 
 _prompt = [[UIAlertView alloc] initWithTitle：@新条目标题...
消息：@\\\
\\\
\\\
//重要
委托：self 
 cancelButtonTitle：@Cancel
 otherButtonTitles：@OK，nil]; 
 
 _textField = [[UITextField alloc] initWithFrame：CGRectMake（17.0，55.0，250.0，25.0）]; 
 
 [_textField setBackgroundColor：[UIColor whiteColor]]; 
 [_textField setPlaceholder：@New Entry Title]; 
 
 _textField.borderStyle = UITextBorderStyleRoundedRect; 
 _textField.autocapitalizationType = UITextAutocapitalizationTypeWords; 
 _textField.autocorrectionType = UITextAutocorrectionTypeNo; 
 
 [_prompt addSubview：_textField]; 
 [_prompt show]; 
 
 //设置游标并显示
 [_textField becomeFirstResponder]; 
} 
  

   - （IBAction）addEntryTapped：（id）sender 
 {
 [_editorTextView resignFirstResponder ]; 
 [self saveTextChanges]; 
 [self dismissPopovers]; 
 
 _prompt = [[UIAlertView alloc] init]; 
 _prompt.alertViewStyle = UIAlertViewStylePlainTextInput; 
 
 UITextField * text = [_prompt textFieldAtIndex：0]; 
 _textField = text; 
 
 [_prompt setDelegate：self]; 
 [_prompt setTitle：@New Entry Title ...]; 
 [_prompt setMessage：@]; 
 [_prompt addButtonWithTitle：@Cancel]; 
 [_prompt addButtonWithTitle：@OK]; 
 [_textField setPlaceholder：@New Entry Title]; 
 
 _textField.autocapitalizationType = UITextAutocapitalizationTypeWords; 
 _textField.autocorrectionType = UITextAutocorrectionTypeNo; 
 
 [_prompt show]; 
 
 //设置游标并显示键盘
 [_textField becomeFirstResponder]; 
} 
  

I have a UISearchBar inside a view, whenever I tap on it, after the keyboard comes up -

after -(BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar

it sends this to the console:

It repeats the same error. I am wonderring what exactly could be the problem?

I believe there is a NULL context out there but what it has to do with a UISearchBar?tnx.

解决方案

It´s a known issue on which Apple is working on. Should be fixed in the next beta release.

Have a look here: Xcode Number pad with decimal error

Edit: For those who have that issue with a textfield maybe this should get you around:

From Apple Developer Forums bye Popeye7 - So all credits to him

- (IBAction)addEntryTapped:(id)sender

{

    [_editorTextView resignFirstResponder];
    [self saveTextChanges];
    [self dismissPopovers];

    _prompt = [[UIAlertView alloc] initWithTitle:@"New Entry Title..."
                                         message:@"\n\n\n" // IMPORTANT
                                        delegate:self
                               cancelButtonTitle:@"Cancel"
                               otherButtonTitles:@"OK", nil];

    _textField = [[UITextField alloc] initWithFrame:CGRectMake(17.0, 55.0, 250.0, 25.0)];

    [_textField setBackgroundColor:[UIColor whiteColor]];
    [_textField setPlaceholder:@"New Entry Title"];

    _textField.borderStyle = UITextBorderStyleRoundedRect;
    _textField.autocapitalizationType = UITextAutocapitalizationTypeWords;
    _textField.autocorrectionType = UITextAutocorrectionTypeNo;

    [_prompt addSubview:_textField];
    [_prompt show];

    // set cursor and show 
    [_textField becomeFirstResponder];
}

- (IBAction) addEntryTapped:(id)sender
{
    [_editorTextView resignFirstResponder];
    [self saveTextChanges];
    [self dismissPopovers];

    _prompt = [[UIAlertView alloc] init];
    _prompt.alertViewStyle = UIAlertViewStylePlainTextInput;

    UITextField *text = [_prompt textFieldAtIndex:0];
    _textField = text;

    [_prompt setDelegate:self];
    [_prompt setTitle:@"New Entry Title..."];
    [_prompt setMessage:@""];
    [_prompt addButtonWithTitle:@"Cancel"];
    [_prompt addButtonWithTitle:@"OK"];
    [_textField setPlaceholder:@"New Entry Title"];

    _textField.autocapitalizationType = UITextAutocapitalizationTypeWords;
    _textField.autocorrectionType = UITextAutocorrectionTypeNo;

    [_prompt show];

    // set cursor and show keyboard
    [_textField becomeFirstResponder];
}  

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