監聽TextField change

.h

@property (strong, nonatomic) IBOutlet UITextField *account;

@property (strong, nonatomic) IBOutlet UITextField *password;

@property (strong, nonatomic) IBOutlet UITextField *displayAccount;

@property (strong, nonatomic) IBOutlet UITextField *displayPassword;

.m

- (void)viewDidLoad

{

//建立監聽事件

    [displayAccount addTarget:self action:@selector(onAccountChange) forControlEvents:UIControlEventEditingChanged];

    [displayPassword addTarget:self action:@selector(onPasswordChange) forControlEvents:UIControlEventEditingChanged];

}

-(void) onAccountChange{

    account.text=displayAccount.text;

}

-(void) onPasswordChange{

    password.text=displayPassword.text;

}