iOS / Objective-C：無法將用戶輸入的內容與Array（index）相匹配

Question

我正在學習IOS / Objective-C，並且我有這個用戶輸入Quizz項目； 目前，我可以顯示所有問題和答案（帶有按鈕和標簽）。 但是對於下一步-用戶輸入答案並得到對還是錯-缺少某些內容； 我似乎無法使用戶輸入與索引匹配。 如果我寫東西，輸出總是“錯誤”。 編碼：

#import "QuizzViewController.h"
#import "Question.h"

@interface QuizzViewController ()

@property (weak, nonatomic) IBOutlet UILabel *questionLabel;
@property (weak, nonatomic) IBOutlet UILabel *answerLabel;

@property NSArray *questions;
@property NSUInteger index;

@property (weak, nonatomic) IBOutlet UILabel *answerValidation;
@property (weak, nonatomic) IBOutlet UITextField *inputAction;


@property (weak, nonatomic) IBOutlet UIButton *answerButton;




@end

@implementation QuizzViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    _questions = @[
                   [Question question:@"Best surfer in the World?" answer:@"Kelly Slater"],
                   [Question question:@"Capital of England?" answer:@"London"],
                   [Question question:@"Capital of Argentina?" answer:@"Buenos Aires"]
                   ];

    _index = -1;
    [self nextQuestionAction];
}



- (IBAction)answerAction:(UIButton *)sender {
    Question *question = [_questions objectAtIndex:_index];

    NSString *correct=@"Correct";
    NSString *wrong=@"Wrong";
    _inputAction.text=question.answer;

    if (question.answer==_inputAction.text){
        _answerValidation.text=correct;
    }else{
        _answerValidation.text=wrong;

    }


}



/*- (IBAction)inputAction:(UITextField *)sender {

    Question *question = [_questions objectAtIndex:_index];

    NSString *correct=@"Correct";
    NSString *wrong=@"Wrong";

    if (question.answer==_inputAction.text){
        _answerValidation.text=correct;
    }else{
    _answerValidation.text=wrong;

    }



}*/


- (IBAction)nextQuestionAction {
    _index = (_index + 1) % _questions.count;
    Question *question = [_questions objectAtIndex:_index];

    _questionLabel.text = question.question;
    _answerLabel.text = @"...";
}

- (IBAction)showAnswerAction {
    Question *question = [_questions objectAtIndex:_index];
    _answerLabel.text = question.answer;
}

@end

我想我需要指出索引，但是我已經嘗試了不同的方式，但是它不起作用...謝謝您的幫助

Answer 1

答案在Larme的幫助下：

- (IBAction)answerAction:(UIButton *)sender {
    Question *question = [_questions objectAtIndex:_index];

    NSString *correct=@"Correct";
    NSString *wrong=@"Wrong";
    _inputAction.text=question.answer;

    if ([question.answer isEqualToString:_inputAction.text]){

        _answerValidation.text=correct;
    }else{
        _answerValidation.text=wrong;

    }


}

比較必須使用“ isEqualToString”方法進行