用于开关盒错误的枚举类型

Question

I wrote following code in my app:

typedef enum{
    PasswordModeEnter = 1,
    PasswordModeSetNewPassword = 3,
    passwordModeVerify = 5,
    PasswordModeChange = 7,
    PasswordModeDisabled = 9
}PasswordModes;

And I instantiated an object named PasswordMode.

- (id)initWithPasswordMode:(PasswordModes *)passwordMode nibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        self.PasswordMode = passwordMode;
    }
    return self;
}

I got an strange error when I wrote following code:

switch (self.PasswordMode) {
        case PasswordModeChange:
            //do something
            break;

        case PasswordModeDisabled:
            //do something
            break;
        case PasswordModeEnter:
            //do something
            break;

        case PasswordModeSetNewPassword:
            //do something
            break;
        case passwordModeVerify:
            //do something
            break;

        default:
            break;
    }

I got following error:

statement requires expression of integer type.

what is the problem and how can I solve it?

Answer 1

The problem is with this

ProblemModes *

The * should be removed.

Answer 2

PasswordModes is just an enum, your init method incorrectly indicates that it is a pointer. The init method signature should be as follows:

- (id)initWithPasswordMode:(PasswordModes)passwordMode nibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;

Your property should be as follows:

@property (nonatomic,assign) PasswordMode passwordMode;

Answer 3

you should specify the type of the enum, also you might want to use the new enum syntax.

typedef NS_ENUM(NSInteger, PasswordMode) {
  PasswordModeEnter          = 1,
  PasswordModeSetNewPassword = 3,
  passwordModeVerify         = 5,
  PasswordModeChange         = 7,
  PasswordModeDisabled       = 9
};

You can use it as follows:

PasswordMode mode = PasswordModeEnter;

switch (mode) {
  case PasswordModeEnter:
    break;

  ...

  case PasswordModeDisabled:
    break;

  default:
    break;
}