推送视图控制器的问题

Posted 2023-03-04

【中文标题】推送视图控制器的问题

【英文标题】：Problem pushing a viewcontroller

【发布时间】：2011-02-12 21:35:23

【问题描述】：

我对这段代码有疑问。我一直在寻找解决方案并收到以下警告：

警告：（没有匹配方法签名的消息将被假定返回“id”并接受“...”作为参数。）。

我知道 .h 文件可能有问题，但我找不到位置。

#import <UIKit/UIKit.h>
@class NewGameViewController;
@class AccessCurrentGameData;
@class QandA_ViewController;
enum 
kTagNewGame = 1,
kTagContinueGame = 2,
;
@interface MainViewController : UIViewController <UIAlertViewDelegate> 
IBOutlet NewGameViewController *newGameViewController;
IBOutlet QandA_ViewController *qanda_ViewController;
UIAlertView *continueExistingGame_alert;
UIAlertView *zeroGameFile_alert;
NSString *title_txt;
NSString *message_txt;
NSString *cancelButton_txt;
NSString *otherButton_txt;
UIAlertView *myAlert;



@property (nonatomic, retain) IBOutlet NewGameViewController *newGameViewController;
@property (nonatomic, retain) IBOutlet QandA_ViewController *qanda_ViewController;
@property (nonatomic, retain) UIAlertView *myAlert;

-(IBAction)continueGame_button:(id)sender;
-(IBAction)newGame_button:(id)sender;

@end

.m 文件：

-(IBAction)continueGame_button:(id)sender 
//=====CHECK IF THERE IS AN ON-GOING GAME, IF SO CONTINUE=====//
AccessCurrentGameData *isThereAnOngoingGameFunction = [AccessCurrentGameData new];
BOOL ongoingGame = [isThereAnOngoingGameFunction checkIfGameOngoing];
[isThereAnOngoingGameFunction release];
NSLog(@"+ + +continueGame_button+ + +");
NSLog(@"ongoingGame = %@\n", (ongoingGame ? @"YES" : @"NO"));
//
if (ongoingGame == YES) 
    NSLog(@"+++++++++ ONGOING GAME +++++++++");

    myAlert = [[UIAlertView alloc]
                initWithTitle:@"Fortsätta spel" 
                message:@"Det finns ett aktivt spel, klicka Spela eller Tillbaka"
                delegate:self
                cancelButtonTitle:@"Tillbaka"
                otherButtonTitles:@"Spela", nil];
    myAlert.tag=kTagContinueGame;
    [myAlert show];
    [myAlert release];



// Load new game screen
-(IBAction)newGame_button:(id)sender 
myAlert = [[UIAlertView alloc]
                initWithTitle:@"Varning" 
                message:@"Om du går vidare kommer pågående spel stoppas och nollställas!"
                delegate:self
                cancelButtonTitle:@"Tillbaka"
                otherButtonTitles:@"Fortsätt", nil];
myAlert.tag=kTagNewGame;
[myAlert show];
[myAlert release];

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex 
switch(myAlert.tag ) 
    case kTagContinueGame:
        NSLog(@"kTagContinueGame");

        NSMutableArray *continueGameArray = [[NSMutableArray alloc] initWithCapacity:0];

        AccessCurrentGameData *getCurrentGameInfo = [AccessCurrentGameData new];
        continueGameArray = [getCurrentGameInfo continueTheCurrentGame];
        [getCurrentGameInfo release];
        NSLog(@"continueGameArray %@", continueGameArray);

        [continueGameArray release];

        QandA_ViewController * temp = [[QandA_ViewController alloc] init];
        [self setQandA_ViewController:temp]; //>>>>>HERE IS THE PROBLEM
        [temp release];
        [[self navigationController] pushViewController:qanda_ViewController animated:YES];
        break;
    case kTagNewGame:
        NSLog(@"kTagNewGame");
        AccessCurrentGameData *zeroCurrentGameFileFunction = [AccessCurrentGameData new];
        [zeroCurrentGameFileFunction firstCreationOrRestoreOfGameDataFile];
        [zeroCurrentGameFileFunction release];

        NewGameViewController * temp2 = [[NewGameViewController alloc] init];
        [self setNewGameViewController:temp2];
        [temp2 release];
        [[self navigationController] pushViewController:newGameViewController animated:YES];
        break;
    default:
        break;

我得到以下输出：

2011-02-12 22:20:40.943 FamQuiz_R0_1[6346:207] -[MainViewController setQandA_ViewController:]：无法识别的选择器发送到实例 0xa120980 2011-02-12 22:20:40.945 FamQuiz_R0_1[6346:207] * 由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：'-[MainViewController setQandA_ViewController:]：无法识别的选择器发送到实例 0xa120980 '

【参考方案1】：

有一个简单的错字。您为QandA_ViewController *qanda_ViewController 声明了一个属性，因此setter 的名称将是setQanda_ViewController，大写Q，但小写a（只有第一个字母大写）。

尝试[self setQanda_ViewController:temp]; 或重命名您的资源。

【讨论】：

非常感谢。非常感谢您的帮助，我现在学到了一些新东西:-) ...经过大量研究。