textFiled shouldChangeCharactersInRange函数不起作用

Question

我正在使用cocos2d CClayer。

我提交了TextField类以使用提交名称。

我跟着一些博主，设法显示textFiled，但shouldChangeCharactersInRange根本没有调用。

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

等待你的帮助。

代码波纹管。 （在Submit.h）

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

（在Submit.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）

@property (nonatomic, strong) Submit *submitForm; 

（在GameLayer.m）

-(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]; 
} 

Answer 1

如果您试图调用UITextField Delega TE法

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

，

你必须设置的UITextField的委托属性。

为，

theTextField.delegate = self;