UISearchBar CGContext ERROR [英] 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：

<错误> ;: CGContextSetStrokeColorWithColor ：无效上下文 0x0 。这个
是一个严重的错误。这个应用程序或其使用的库正在使用
无效的上下文，从而有助于系统稳定性和可靠性的总体的
降低。此通知是一个
礼貌：请解决这个问题。它将在
即将到来的更新中成为致命错误。

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： Xcode Number pad with decimal error

编辑：对于那些在textfield有问题的人应该帮助你：

从苹果开发者论坛bye Popeye7 - 所有的学分给他

我找到了这个问题的修复！我有3个应用程序，这是现在打破，所以，对我...这是一个很好的发现。找到解决方案StackOverflow ...结合两个答案一个类似的问题。

在我的情况下，用户点击一个barButtonItem和一个警报或对话框出现。 / p>

我看到的最大的区别是如何分配UIAlertView。
NEW WAY的文本框显示出来，并显示出它应该的键盘。

我现在可以看到textField，输入文本按我期望的方式工作。添加initWithFrame对textField放置没有任何影响。

旧版....

   - （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]; 
} 
  

NEW WAY ...

   - （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]; 
} 
  

讯息由Popeye7于9/25 / 13 at 12:25 PM

讯息由Popeye7于9/25/13于12:33编辑

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:

<Error>: CGContextSetStrokeColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

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

I have found a fix for this issue! I have 3 apps that this is now broken on, so, to me... this is a good find. Found the solution on StackOverflow... combined two answers to a similar question.

In my case, a user taps a barButtonItem and an "alert" or dialog appears.

I see the big difference is in how the UIAlertView is allocated. The "NEW WAY" has the textField showing and brings up the keyboard as it should.

I am now able to see the textField, enter text and it works the way I expect it to. Adding the "initWithFrame" back in has no affect on the textField placement.

OLD WAY....

- (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];
}

NEW WAY...

- (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];
}  

Message was edited by Popeye7 on 9/25/13 at 12:25 PM

Message was edited by Popeye7 on 9/25/13 at 12:33 PM

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