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我正在使用 cocos2d CClayer。

我制作了提交 TextField 类以使用提交名称。

我关注了一些博主并设法显示 textFiled，但 shouldChangeCharactersInRange 根本没有调用。

我如何调用 shouldChangeCharactersInRange？（我没有使用xib）

等待您的帮助。

代码如下。（在提交.h）

@property (nonatomic, retain) UITextField *mTextField;
@property (readonly) NSString *enteredText;

（在提交.m）

-(id)initWithTitle:(NSString *)title message:(NSString *)message delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle okButtonTitle:(NSString *)okButtonTitle{
    if(self = [super initWithTitle:title message:message delegate:(id)delegate cancelButtonTitle:(NSString *)cancelButtonTitle otherButtonTitles:(NSString *)okButtonTitle, nil]) {
        UITextField *theTextField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 65.0, 260.0, 25.0)];
        [theTextField setBackgroundColor:[UIColor whiteColor]];
        [self addSubview:theTextField];
        self.mTextField = theTextField;
        [theTextField release];

    }
    return self;
}

- (BOOL)textField: (UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{
    NSUInteger newLength = [textField.text length] + [string length] - range.length;
    return (newLength > MAXLENGTH) ? NO : YES;
}

（在 GameLayer.h 中）

@property (nonatomic, strong) Submit *submitForm;

（在 GameLayer.m 中）

-(void) submit:(id) sender {
    Submit *prompt = [Submit alloc];
    prompt = [prompt initWithTitle:@"Post Score" message:@"Enter Your Name\n\n\n" delegate:self cancelButtonTitle:@"Cancel" okButtonTitle:@"Okay"];
    CGAffineTransform moveDown = CGAffineTransformMakeTranslation(0,-10);
    [prompt setTransform:moveDown];
    self.submitForm = prompt;
    [submitForm show];
    [prompt release];   
}
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1 回答 1

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如果您尝试调用 UITextField 委托方法

 - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:  (NSRange)range replacementString:(NSString *)string

,

您必须设置 uitextfield 的委托属性。

作为，

theTextField.delegate = self;
于 2012-02-21T07:16:19.200 回答