在uitextfield的委托中得到警告

Question

I'm new in iphone development.now, I'm facing one warning in my project.while,setting the delegate of UITextfield in ios 6 I'm getting the warning that

 "**incompatible pointer types sending 'class' to parameter of type '<uitextfielddelegate>'**"


+(UITextField*)tableLabelForText:(NSString *)txt frame:(CGRect)frm isEditable:(BOOL)isEditable 

{

    UITextField *txtField = [[UITextField alloc] initWithFrame:frm];
    [txtField setEnabled:isEditable];

    [txtField setText:txt];

    [txtField setTextColor:[UIColor blackColor]];
    [txtField setDelegate:self];

    return txtField;
}

Answer 1

You are trying to assign the delegate in a class method which has no idea of the initialised object. Hence the warning. What you need to do is setDelegate to the initialised object.

[txtField setDelegate:<MyObject>]; 

Or you can as one of the answers suggests change the class methods to instance method.

-(UITextField*)tableLabelForText:(NSString *)txt frame:(CGRect)frm isEditable:(BOOL)isEditable 

Answer 2

You are using a Class level method " + " to return a text field instance, change it to Instance Level Method " - ". ie:

-(UITextField*)tableLabelForText:(NSString *)txt frame:(CGRect)frm isEditable:(BOOL)isEditable 

Answer 3

If I am not wrong , you are setting Delegate for an NSObject class , as NSObject class does not have any views , so UITextFieldDelegate does not confirms to the class. Instead use UIView

@interface ClassName : UIView  <UITextFieldDelegate>