玩游戏后重置arrays？

我在iOS中使用xcode进行了测验，我现在所拥有的是一个测验，可以从一个数组中生成20个随机答案，它会在按下按钮时控制标签的文本以检查答案是否正确。 答案也是随机生成的，我确保没有相同文本的多个答案。 我的问题是，当提出问题时，我将数组中对象的文本更改为“已删除”; 但是当我完成测验后再次按下启动时，我的数组有20个字符串为“remove”的对象; 我的问题是：如何将数组重置为普通对象？ 这是我的完整代码，忽略评论，但它是一种垃圾，因为我是ios编程的新手：

// // ViewController.m // Mundo Grafia // // Created by Axel Lambregts on 2/10/12. // Copyright (c) 2012 AxelNiels. All rights reserved. // #import "ViewController.h" @interface ViewController () @end @implementation ViewController // variabelen aanmaken NSInteger intScore; NSInteger intRandomMonument; NSInteger intRandomAnswerPosition; NSInteger intRandomAnswerA; NSInteger intRandomAnswerB; NSInteger intRandomAnswerC; NSInteger intRandomAnswerD; NSInteger intArrayEuropeLenght; NSInteger intAmountOfQuestionsAsked; NSString *scoreSpatie; NSString *arrEurope[][2] = { {@"Eifel.jpg",@"Paris"}, {@"NotreDame.jpg",@"Paris"}, {@"ArcDeTriompheParis.jpg",@"Paris"}, {@"AtomuimBrussels.jpg",@"Brussels"}, {@"MannekePis.jpg",@"Brussels"}, {@"Colosseum.jpg",@"Rome"}, {@"TreviFountainRome.jpg",@"Rome"}, {@"SagradaFamilia.jpg",@"Barcelona"}, {@"SpanishSchoolMadrid.jpg",@"Madrid"}, {@"KremlinMoskou.jpg",@"Moskou"}, {@"MermaidKopenhagen.jpg",@"Copenhagen"}, {@"MonteCarloMonaco.jpg",@"Monaco"}, {@"AcropolisAthens.jpg",@"Athens"}, {@"ParlementBudapest.jpg",@"Budapest"}, {@"BuildingReykjavik.jpg",@"Reykjavik"}, {@"StatueKiev.jpg",@"Kiev"}, {@"PortOfEuropeLissabon.jpg",@"Lisbon"}, {@"ViewSanMarino.jpg",@"San Marino"}, {@"BridgesPrague.jpg",@"Prague"}, {@"MoskeeAnkara.jpg",@"Ankara"}, {@"TowerBridgeLondon.jpg",@"London"}, {@"BigBenLondon.jpg",@"London"}, {@"LondonEyeLondon.jpg",@"London"}, {@"BrandenburgerTor.jpg",@"Berlin"}, {@"ReichstagBerlin.jpg",@"Berlin"}, {nil,nil} }; /* NSArray *arrEurope = @[ @[@"Eifel.jpg",@"Paris"], @[@"NotreDame.jpg",@"Paris"], @[@"ArcDeTriompheParis.jpg",@"Paris"], @[@"Eifel.jpg",@"Paris"], @[@"NotreDame.jpg",@"Paris"], @[@"ArcDeTriompheParis.jpg",@"Paris"], @[@"AtomuimBrussels.jpg",@"Brussels"], @[@"MannekePis.jpg",@"Brussels"], @[@"Colosseum.jpg",@"Rome"], @[@"TreviFountainRome.jpg",@"Rome"], @[@"SagradaFamilia.jpg",@"Barcelona"], @[@"SpanishSchoolMadrid.jpg",@"Madrid"], @[@"KremlinMoskou.jpg",@"Moskou"], @[@"MermaidKopenhagen.jpg",@"Copenhagen"], @[@"MonteCarloMonaco.jpg",@"Monaco"], @[@"AcropolisAthens.jpg",@"Athens"], @[@"ParlementBudapest.jpg",@"Budapest"], @[@"BuildingReykjavik.jpg",@"Reykjavik"], @[@"StatueKiev.jpg",@"Kiev"], @[@"PortOfEuropeLissabon.jpg",@"Lisbon"], @[@"ViewSanMarino.jpg",@"San Marino"], @[@"BridgesPrague.jpg",@"Prague"], @[@"MoskeeAnkara.jpg",@"Ankara"], @[@"TowerBridgeLondon.jpg",@"London"], @[@"BigBenLondon.jpg",@"London"], @[@"LondonEyeLondon.jpg",@"London"], @[@"BrandenburgerTor.jpg",@"Berlin"], @[@"ReichstagBerlin.jpg",@"Berlin"] ]; */ //methode'start' wanneer er op de start-knop wordt gedrukt -(IBAction)start{ [self NewQuestionEurope]; intAmountOfQuestionsAsked = 0; //reset and show score intScore = 0; score.text = [NSString stringWithFormat:@"%d", intScore]; //make buttons and labels visible Start.hidden = YES; question.hidden = NO; score.hidden = NO; scoretext.hidden = NO; imageContainer.hidden = NO; answerA.hidden = NO; answerB.hidden = NO; answerC.hidden = NO; answerD.hidden = NO; answerA.textColor = [UIColor greenColor]; answerB.textColor = [UIColor greenColor]; answerC.textColor = [UIColor greenColor]; answerD.textColor = [UIColor greenColor]; clickButtonA.hidden = NO; clickButtonB.hidden = NO; clickButtonC.hidden = NO; clickButtonD.hidden = NO; GoodFalse.hidden = NO; GoodFalse.text=@"Press a button to answer"; GoodFalse.textColor = [UIColor greenColor]; question.text = @"Where is this picture taken?"; }//einde start -(IBAction)Reset{ score.text= @"gelukt"; } -(IBAction)NewQuestionEurope{ if(intAmountOfQuestionsAsked == 19){ question.text = [@"Uw score is: "stringByAppendingString: [NSString stringWithFormat:@"%d", intScore]]; Start.hidden = NO; question.hidden = NO; score.hidden = YES; scoretext.hidden = YES; imageContainer.hidden = YES; answerA.hidden = YES; answerB.hidden = YES; answerC.hidden = YES; answerD.hidden = YES; clickButtonA.hidden = YES; clickButtonB.hidden = YES; clickButtonC.hidden = YES; clickButtonD.hidden = YES; GoodFalse.hidden = YES; Start.titleLabel.text = @"END"; } else{ intAmountOfQuestionsAsked ++; //Deze lus geeft aan intArrayEuropeLenght de waarde van hoeveel rijen de array bevat// intArrayEuropeLenght = 0; while (arrEurope[intArrayEuropeLenght][0] != NULL) { intArrayEuropeLenght++; } //score.text = [NSString stringWithFormat:@"%d", intScore]; scoreSpatie = [ [NSString stringWithFormat:@"%d", intScore] stringByAppendingString:@"/"]; score.text = [ scoreSpatie stringByAppendingString:[NSString stringWithFormat:@"%d", intAmountOfQuestionsAsked] ]; // Randoms genereren voor: 4 random antwoorden; 1 random afbeelding; een random positie om het juiste antwoord in te plaatsen intRandomMonument = arc4random()%intArrayEuropeLenght; intRandomAnswerA = arc4random()%intArrayEuropeLenght; intRandomAnswerB = arc4random()%intArrayEuropeLenght; intRandomAnswerC = arc4random()%intArrayEuropeLenght; intRandomAnswerD = arc4random()%intArrayEuropeLenght; intRandomAnswerPosition = arc4random()%4; while(arrEurope[intRandomMonument][0] == @"removed"){ intRandomMonument = arc4random()%intArrayEuropeLenght; } //Random antwoorden maken answerA.text = @""; answerB.text = @""; answerC.text = @""; answerD.text = @""; if(answerA.text = @""){ answerA.text = arrEurope[intRandomAnswerA][1]; } if(answerB.text = @""){ answerB.text = arrEurope[intRandomAnswerB][1]; } if(answerC.text = @""){ answerC.text = arrEurope[intRandomAnswerC][1]; } if(answerD.text = @""){ answerD.text = arrEurope[intRandomAnswerD][1]; } switch(intRandomAnswerPosition) { case 0: answerA.text = arrEurope[intRandomMonument][1]; break; case 1: answerB.text = arrEurope[intRandomMonument][1]; break; case 2: answerC.text = arrEurope[intRandomMonument][1]; break; case 3: answerD.text = arrEurope[intRandomMonument][1]; }; //als er antwoorden hetzelfde zijn, voor de gelijke een random blijven maken tot ze niet hetzelfde zijn if( [answerA.text isEqualToString: answerB.text]|| [answerA.text isEqualToString: answerC.text]|| [answerA.text isEqualToString: answerD.text] ){ answerA.text = arrEurope[arc4random()%intArrayEuropeLenght][1]; }; if( [answerB.text isEqualToString: answerA.text]|| [answerB.text isEqualToString: answerC.text]|| [answerB.text isEqualToString: answerD.text] ){ answerB.text = arrEurope[arc4random()%intArrayEuropeLenght][1]; }; if( [answerC.text isEqualToString: answerA.text]|| [answerC.text isEqualToString: answerB.text]|| [answerC.text isEqualToString: answerD.text] ){ answerC.text = arrEurope[arc4random()%intArrayEuropeLenght][1]; }; if( [answerD.text isEqualToString: answerA.text]|| [answerD.text isEqualToString: answerB.text]|| [answerD.text isEqualToString: answerC.text] ){ answerD.text = arrEurope[arc4random()%intArrayEuropeLenght][1]; }; //Laat de afbeelding zien van het gekozen monument (via random gekozen) imageContainer.image = [UIImage imageNamed: arrEurope[intRandomMonument][0]]; } } //hier onder zit ergens een fout want hij geeft precies random juist en fout :) //kan zijn dat het opgelost is vanaf we niet 2x dezelfde vragen hebben maar ik denk het niet. //press buttonA -(IBAction)AnswerA { if([answerA.text isEqualToString: arrEurope[intRandomMonument][1]]){ GoodFalse.text = @"Correct!"; GoodFalse.textColor = [UIColor greenColor]; intScore ++; }else { GoodFalse.text=@"Wrong!"; GoodFalse.textColor = [UIColor redColor]; } arrEurope[intRandomMonument][0] = @"removed"; [self NewQuestionEurope]; } //press buttonB -(IBAction)AnswerB { if([answerB.text isEqualToString: arrEurope[intRandomMonument][1]]){ GoodFalse.text = @"Correct!"; GoodFalse.textColor = [UIColor greenColor]; intScore ++; }else { GoodFalse.text=@"Wrong!"; GoodFalse.textColor = [UIColor redColor]; } arrEurope[intRandomMonument][0] = @"removed"; [self NewQuestionEurope]; } //press buttonC (works) -(IBAction)AnswerC { if([answerC.text isEqualToString: arrEurope[intRandomMonument][1]]){ GoodFalse.text = @"Correct!"; GoodFalse.textColor = [UIColor greenColor]; intScore ++; }else { GoodFalse.text=@"Wrong!"; GoodFalse.textColor = [UIColor redColor]; } arrEurope[intRandomMonument][0] = @"removed"; [self NewQuestionEurope]; } //press buttonD -(IBAction)AnswerD { if([answerD.text isEqualToString: arrEurope[intRandomMonument][1]]){ GoodFalse.text = @"Correct"; GoodFalse.textColor = [UIColor greenColor]; intScore ++; }else { GoodFalse.text=@"Wrong!"; GoodFalse.textColor = [UIColor redColor]; } arrEurope[intRandomMonument][0] = @"removed"; [self NewQuestionEurope]; } //hier onder niets wijzigen - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end 

Answer 1

我看到2个选项：

你再次调用init线…

 String *arrEurope[][2] = { {@"Eifel.jpg",@"Paris"}, {@"NotreDame.jpg",@"Paris"},... 

或者你向数组中添加第三行并将“删除”（我将其称之为“used”）参数放在那里。 在最后一种情况下，您可以再次遍历数组并将“已删除”重新置于“活动”状态

Answer 2

在游戏开始时制作arrEurope的副本，并在重新开始游戏时恢复它，或者使用其他arrays将问题标记为已删除。 我个人会尝试使用选项2。