ios - 在我的viewDidLoad中获取EXC_BAD_ACCESS

Question

在我的iOS应用程序的viewDidLoad方法中，我具有以下代码行:

loadDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"1.0", "version number", nil]; 

并导致 EXC_BAD_ACCESS错误。我不知道为什么。除了该行所在的if / else语句的另一侧之外， viewDidLoad方法中没有其他东西使用该对象，因此不可能已经释放它。我只是不确定是什么问题。如果您想查看我的整个 viewDidLoad方法，则为:

- (void)viewDidLoad
{
    [super viewDidLoad];
    tapsBackground = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard)];
    tapsBackground.delegate = self;
    [self.view addGestureRecognizer:tapsBackground];

    saveChangesButton.hidden = YES;

    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    filePath = [documentsDirectory stringByAppendingPathComponent:@"presets.plist"];

    if([[NSFileManager defaultManager] fileExistsAtPath:filePath]){
        loadDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];
    }

    else{
        loadDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"1.0", "version number", nil];
        [loadDict writeToFile:filePath atomically:YES];
    }
}

Answer 1

问题是您在第二个字符串中缺少@，即"version number"。

loadDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"1.0", "version number", nil];

它应该是，

loadDict = [[NSMutableDictionary alloc] initWithObjectsAndKeys:@"1.0", @"version number", nil];