【问题标题】:Weird crash when first tapping UITextField首次点击 UITextField 时出现奇怪的崩溃
【发布时间】:2011-05-13 19:10:09
【问题描述】:

我的 Cocos2d 应用程序中有一个文本字段,当我点击它开始输入时,应用程序就崩溃了。我没有更多要解释的,这是我的代码: .h:

@interface myScene : CCLayer <UITextFieldDelegate> { ....... }
@property (nonatomic, retain, readonly) UITextField *first;
@property (nonatomic, retain, readonly) UITextField *second;

.mm:

    @implementation myScene
    @synthesize first, second;
    ......
        first = [[UITextField alloc] initWithFrame:CGRectMake(160.0, 160.0, 200.0, 30.0)];
        first.placeholder = @"first";
        first.autocorrectionType = UITextAutocorrectionTypeNo;  // no auto correction suppor
        first.keyboardType = UIKeyboardTypeDefault; // use the default type input method (entire keyboard)
        first.returnKeyType = UIReturnKeyDone;
        first.clearButtonMode = UITextFieldViewModeWhileEditing;    // has a clear 'x' button to the right
        first.autocapitalizationType =  UITextAutocapitalizationTypeNone;
        CGAffineTransform transform = CGAffineTransformMakeRotation(3.14159/2);  
        first.transform = transform;
        first.adjustsFontSizeToFitWidth = YES;
        first.textColor = [UIColor blackColor];
        [first setFont:[UIFont fontWithName:@"Arial" size:14]];
        first.backgroundColor = [UIColor clearColor];
        first.borderStyle = UITextBorderStyleRoundedRect;
        first.delegate = self;  // let us be the delegate so we know when the keyboard's "Done" button is pressed
        [[[CCDirector sharedDirector] openGLView] addSubview: first];


        second = [[UITextField alloc] initWithFrame:CGRectMake(130.0, 160.0, 200.0, 30.0)];
        second.placeholder = @"second";
        second.returnKeyType = UIReturnKeyDone;

        second.transform = transform;
        second.adjustsFontSizeToFitWidth = YES;
        second.textColor = [UIColor blackColor];
        [second setFont:[UIFont fontWithName:@"Arial" size:14]];
        second.backgroundColor = [UIColor clearColor];
        second.borderStyle = UITextBorderStyleRoundedRect;
        second.secureTextEntry = YES;
        second.delegate = self; // let us be the delegate so we know when the keyboard's "Done" button is pressed
        [[[CCDirector sharedDirector] openGLView] addSubview: second];

...............


    - (BOOL)textFieldShouldReturn:(UITextField *)textField
    {
        // the user pressed the "Done" button, so dismiss the keyboard
        [textField resignFirstResponder];
        return YES;
    }

我在带有 iOS 4.3 的 Xcode 4 上运行,当我点击其中一个字段时,我得到 EXC_BAD_ACCESS,Xcode 将我指向 main.m:

#import <UIKit/UIKit.h>

int main(int argc, char *argv[]) {
    NSAutoreleasePool *pool = [NSAutoreleasePool new];
    int retVal = UIApplicationMain(argc, argv, nil, @"AppDelegate");
    [pool release];
    return retVal;
}

Xcode 表示行:int retVal = UIApplicationMain(argc, argv, nil, @"AppDelegate");

谢谢。

【问题讨论】:

  • 贾利亚是对的。您确实需要解释更多内容,这就是您在应用崩溃时收到的确切消息和其他行为。
  • 发生崩溃时,在调试器中输入 bt 并粘贴到这里。

标签: cocoa-touch ios uikit cocos2d-iphone uitextfield


【解决方案1】:

我不认为这是在您的 openGL 视图中添加文本字段的最佳方式,事实上我不确定它是否会起作用。您可能需要将您的字段放在 UIViewController 子类中,然后将该类的视图添加到您的openGLView,或者有一个很好的 UIViewWrapper 您可以获得here。它允许您将 UIView 元素添加到您的 CCLayer。希望这会有所帮助

【讨论】:

    【解决方案2】:

    尝试按照http://www.cocoadev.com/index.pl?NSZombieEnabled 中的说明添加 NSZombieEnabled

    它应该写一些比“EXC_BAD_ACCESS”消息更有趣的东西

    【讨论】:

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