Ios 视图控制器仅在第一次保存到coredata时填写我的表单

所以这对我来说有点奇怪，但我有一个表格，可以填好，保存到coreData，然后带回来，填好保存的字段。除了保存在可转换属性中的NSMutableIndexSet之外，其他一切都正常工作。它保存fine并每次重新加载fine，除非我保存第二次，否则如果我重新加载页面，我会得到一个NSLog:

（无索引）

如果我重新运行应用程序，保存的数据将正确填充，直到我再次保存

编辑：我想我真正的问题是，为什么需要重新运行应用程序才能让我的视图正常工作？有解决办法吗

保存代码：

- (IBAction)save:(id)sender {
    NSManagedObjectContext *context = [self managedObjectContext];

    if ((self.form)||(formEdited)) {

    }

    else {
        self.form = [NSEntityDescription insertNewObjectForEntityForName:@"CookingSupplement" inManagedObjectContext:context];
    }
    // Update existing form
    [self.form setValue:@"Form 1" forKey:@"formType"];

    [self prepIndexSave:self.type.selectedSegmentIndexes secondMethod:self.type forKey:@"type" forIndexKey:@"typeIndexes"];

    NSLog(@"indexes being saved= %@", self.type.selectedSegmentIndexes);

      NSError *error = nil;
    // Save the object to persistent store
    if (![context save:&error]) {
        NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
    }

    formEdited = YES;
}

- (void)prepIndexSave:(NSIndexSet *)multiIndex secondMethod:(UISegmentedControl *)seg forKey:(NSString *)key forIndexKey:(NSString *)indexKey {
    NSMutableArray *array = [NSMutableArray array];
    [multiIndex enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
        [array addObject:@(idx)];
    }];


    NSMutableArray *titles = [NSMutableArray array];
    for (NSNumber *index in array) {
        [titles addObject:[seg titleForSegmentAtIndex:index.integerValue]];
    }
    NSLog(@"new array::%@",titles);
    [self.form setValue:titles forKey:key];

    // now set indexes
    [self.form setValue:multiIndex forKey:indexKey];


}

- (void)viewDidAppear:(BOOL)animated {
    [self.type setSelectedSegmentIndexes:[self.form valueForKey:@"typeIndexes"]];

    NSLog(@"form type indexes:%@", [self.form valueForKey:@"typeIndexes"]);

}

@property (strong, retain) NSManagedObject *form;
@property (strong, nonatomic) IBOutlet MultiSelectSegmentedControl *type;

NSLog始终打印要保存的正确索引

助手方法：

- (IBAction)save:(id)sender {
    NSManagedObjectContext *context = [self managedObjectContext];

    if ((self.form)||(formEdited)) {

    }

    else {
        self.form = [NSEntityDescription insertNewObjectForEntityForName:@"CookingSupplement" inManagedObjectContext:context];
    }
    // Update existing form
    [self.form setValue:@"Form 1" forKey:@"formType"];

    [self prepIndexSave:self.type.selectedSegmentIndexes secondMethod:self.type forKey:@"type" forIndexKey:@"typeIndexes"];

    NSLog(@"indexes being saved= %@", self.type.selectedSegmentIndexes);

      NSError *error = nil;
    // Save the object to persistent store
    if (![context save:&error]) {
        NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
    }

    formEdited = YES;
}

- (void)prepIndexSave:(NSIndexSet *)multiIndex secondMethod:(UISegmentedControl *)seg forKey:(NSString *)key forIndexKey:(NSString *)indexKey {
    NSMutableArray *array = [NSMutableArray array];
    [multiIndex enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
        [array addObject:@(idx)];
    }];


    NSMutableArray *titles = [NSMutableArray array];
    for (NSNumber *index in array) {
        [titles addObject:[seg titleForSegmentAtIndex:index.integerValue]];
    }
    NSLog(@"new array::%@",titles);
    [self.form setValue:titles forKey:key];

    // now set indexes
    [self.form setValue:multiIndex forKey:indexKey];


}

- (void)viewDidAppear:(BOOL)animated {
    [self.type setSelectedSegmentIndexes:[self.form valueForKey:@"typeIndexes"]];

    NSLog(@"form type indexes:%@", [self.form valueForKey:@"typeIndexes"]);

}

@property (strong, retain) NSManagedObject *form;
@property (strong, nonatomic) IBOutlet MultiSelectSegmentedControl *type;

视图显示：

- (IBAction)save:(id)sender {
    NSManagedObjectContext *context = [self managedObjectContext];

    if ((self.form)||(formEdited)) {

    }

    else {
        self.form = [NSEntityDescription insertNewObjectForEntityForName:@"CookingSupplement" inManagedObjectContext:context];
    }
    // Update existing form
    [self.form setValue:@"Form 1" forKey:@"formType"];

    [self prepIndexSave:self.type.selectedSegmentIndexes secondMethod:self.type forKey:@"type" forIndexKey:@"typeIndexes"];

    NSLog(@"indexes being saved= %@", self.type.selectedSegmentIndexes);

      NSError *error = nil;
    // Save the object to persistent store
    if (![context save:&error]) {
        NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
    }

    formEdited = YES;
}

- (void)prepIndexSave:(NSIndexSet *)multiIndex secondMethod:(UISegmentedControl *)seg forKey:(NSString *)key forIndexKey:(NSString *)indexKey {
    NSMutableArray *array = [NSMutableArray array];
    [multiIndex enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
        [array addObject:@(idx)];
    }];


    NSMutableArray *titles = [NSMutableArray array];
    for (NSNumber *index in array) {
        [titles addObject:[seg titleForSegmentAtIndex:index.integerValue]];
    }
    NSLog(@"new array::%@",titles);
    [self.form setValue:titles forKey:key];

    // now set indexes
    [self.form setValue:multiIndex forKey:indexKey];


}

- (void)viewDidAppear:(BOOL)animated {
    [self.type setSelectedSegmentIndexes:[self.form valueForKey:@"typeIndexes"]];

    NSLog(@"form type indexes:%@", [self.form valueForKey:@"typeIndexes"]);

}

@property (strong, retain) NSManagedObject *form;
@property (strong, nonatomic) IBOutlet MultiSelectSegmentedControl *type;

实施：

- (IBAction)save:(id)sender {
    NSManagedObjectContext *context = [self managedObjectContext];

    if ((self.form)||(formEdited)) {

    }

    else {
        self.form = [NSEntityDescription insertNewObjectForEntityForName:@"CookingSupplement" inManagedObjectContext:context];
    }
    // Update existing form
    [self.form setValue:@"Form 1" forKey:@"formType"];

    [self prepIndexSave:self.type.selectedSegmentIndexes secondMethod:self.type forKey:@"type" forIndexKey:@"typeIndexes"];

    NSLog(@"indexes being saved= %@", self.type.selectedSegmentIndexes);

      NSError *error = nil;
    // Save the object to persistent store
    if (![context save:&error]) {
        NSLog(@"Can't Save! %@ %@", error, [error localizedDescription]);
    }

    formEdited = YES;
}

- (void)prepIndexSave:(NSIndexSet *)multiIndex secondMethod:(UISegmentedControl *)seg forKey:(NSString *)key forIndexKey:(NSString *)indexKey {
    NSMutableArray *array = [NSMutableArray array];
    [multiIndex enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL *stop) {
        [array addObject:@(idx)];
    }];


    NSMutableArray *titles = [NSMutableArray array];
    for (NSNumber *index in array) {
        [titles addObject:[seg titleForSegmentAtIndex:index.integerValue]];
    }
    NSLog(@"new array::%@",titles);
    [self.form setValue:titles forKey:key];

    // now set indexes
    [self.form setValue:multiIndex forKey:indexKey];


}

- (void)viewDidAppear:(BOOL)animated {
    [self.type setSelectedSegmentIndexes:[self.form valueForKey:@"typeIndexes"]];

    NSLog(@"form type indexes:%@", [self.form valueForKey:@"typeIndexes"]);

}

@property (strong, retain) NSManagedObject *form;
@property (strong, nonatomic) IBOutlet MultiSelectSegmentedControl *type;

此NSLog打印正确的索引，直到按下save并重新加载页面。通过重新运行应用程序，然后加载并打印保存的正确索引，可以纠正此问题。

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如果需要更多信息，请告诉我，我会添加它。

我做到了！半天之后，我发现将NSMutableIndex保存到transformable属性类型会导致问题，并添加：

NSIndexSet *indexSet = [multiIndex copy];

对我的助手来说，一切都成功了

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你能粘贴你的ViewWillDisplay/ViewDidDisplay和其他方法吗？Oops viewDidLoad被认为是biewDidAppear，但这就是我在viewDidLoad中对视图显示/加载所做的一切，我在viewDidLoad中注释了所有内容，仍然存在相同的问题。哪一行代码输出带有“（无索引）”的NSLog（…）？ReyGonzales在视图中出现。当我第一次打开视图时，它会显示类似于

[索引数量：1（在1个范围内），索引：（1）]

的内容，但是如果我单击我的保存按钮，然后单击返回，然后返回到我的表单，我没有得到任何索引来更好地了解我拥有的内容：我有一个加载所有已启动表单的tableview，从那里，您可以单击启动的表单，它将推送表单并从coredata加载保存的数据。当我保存时，然后推回并返回到表单中，除了这些索引之外，所有内容都正确加载