Question

升级到最新的Xcode后，我的应用程序停止使用数据填充RootViewController。但是，当我点击下一个屏幕并返回时，所有数据都在那里。我无法弄清楚这一点，所以我把代码片段放在下面：

- (void)startLoading
{
    HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view];
    [self.navigationController.view addSubview:HUD];

    self.window.rootViewController = navigationController;

    HUD.delegate = self;

    [HUD showWhileExecuting:@selector(loadInBackground) onTarget:self withObject:nil animated:YES];

    NSLog(@"navigationController = %@", [navigationController view]);

}
- (void)loadInBackground
{
    //Copy database to the user's phone if needed.
    [self copyDatabaseIfNeeded];

    [self populateFromDatabase];

    [self performSelectorOnMainThread:@selector(finishedLoading) withObject:nil waitUntilDone:NO];
}

- (void)finishedLoading
{

    //back on the main thread now, it's safe to show your view controller
    [window addSubview:[navigationController view]];
    [window makeKeyAndVisible];

}

- (void)applicationDidFinishLaunching:(UIApplication *)application {

    [self startLoading];

}

...

- (void) populateFromDatabase {

    // Init the Array
    activeCategories = [[NSMutableArray alloc] init];
    activeSubjects = [[NSMutableArray alloc] init];
    activeQuotes = [[NSMutableArray alloc] init];
    categories = [[NSMutableArray alloc] init];
    subjects = [[NSMutableArray alloc] init];
    quotes = [[NSMutableArray alloc] init];
    quoteMaps = [[NSMutableArray alloc] init];

    //this is not currently getting the category filled up with anything
    [Category getInitialDataToDisplay:[self getDBPath]];

...

@implementation Category 

- (id)init {
    self = [super init];
    if (self) {
        subjects = [[NSMutableArray alloc] init]; 
    }
    return self;
}


+ (void) getInitialDataToDisplay:(NSString *)dbPath {

    NSLog(@"getInitialDataToDisplay is loading data...");

    // Use this section to bring in database and populate the array
    FMDatabase *database = [FMDatabase databaseWithPath:dbPath];    
    [database open];

    QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];

    //POPULATE THE QUOTES 
    FMResultSet *result_quotes = [database executeQuery:@"select * from QUOTE"];

    while([result_quotes next]) {

        //for some reason q is not instantiated and shows up as nil
        Quote *q = [Quote alloc];

        q.quote_id = [result_quotes stringForColumn:@"QUOTE_ID"];
        q.quote_date = [result_quotes stringForColumn:@"DATE"];
        q.title = [result_quotes stringForColumn:@"DESC1"];
        q.desc2 = [result_quotes stringForColumn:@"DESC2"];
        q.excerpt = [result_quotes stringForColumn:@"EXCERPT"];
        q.note = [result_quotes stringForColumn:@"NOTES"];
        q.isDirty = NO;

        [appDelegate.quotes addObject:q];
//        [q release];

    }

...

我注意到的一件事是当我打破“Quote * q = [Quote alloc];”线是q是零。

任何有关解决此问题的建议或指示都将受到赞赏。

这是Quote init方法：

#import "Quote.h"
#import "QuotesAppDelegate.h"
#import "FMDatabase.h"
#import "FMResultSet.h"

@implementation Quote

@synthesize quote_id, quote_date, isDirty, title, desc2, excerpt, note;


//- (id) initWithPrimaryKey:(NSInteger) pk {
//  
//  [super init];
////    quote_id = pk;
//      quote_id = [pk stringValueof];
//  
//  return self;
//}

- (void) addQuote {

    // This step will involve both inserting a new record into the quote_map table as well as the quote table. 
    // Will need the new quote_id first and then will need a new quote_map_id and with these grab the subject_id and insert a new quote_map

    QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];
    FMDatabase *database = [FMDatabase databaseWithPath:appDelegate.getDBPath];    

    //    NSNumber *myNum = [NSNumber numberWithInt:self.subject_id];

    NSLog(@"Quote addQuote: QUOTE_ID/DESC1/DESC2/EXCERPT = %@ / %@ / %@ / %@", self.quote_id , self.title, self.desc2, self.excerpt);

    NSInteger quoteInt = [self.quote_id intValue];

    if ([database open]) {
        [database executeUpdate:@"insert into QUOTE(quote_id, desc1, desc2, date, excerpt) values(?, ?, ?, ?, ?)", 
         [NSNumber numberWithInt:quoteInt], self.title, self.desc2, self.quote_date, self.excerpt];

        [database close];
    }

}

- (void) deleteQuote {

    QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];
    FMDatabase *database = [FMDatabase databaseWithPath:appDelegate.getDBPath];    

    NSInteger quoteIdInt = [self.quote_id intValue];

    if ([database open]) {

        [database executeUpdate:@"DELETE FROM QUOTE WHERE quote_id = ?", 
         [NSNumber numberWithInt:quoteIdInt]];

        [database executeUpdate:@"DELETE FROM QUOTE_MAP WHERE quote_id = ?", 
         [NSNumber numberWithInt:quoteIdInt]];

        [database close];
    }

}


- (NSInteger)getNextQuoteId {

    QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];

    FMDatabase *database = [FMDatabase databaseWithPath:appDelegate.getDBPath];    
    [database open];

    FMResultSet *rst = [database executeQuery:@"select max(quote_id) + 1 AS QUOTE_ID from QUOTE"];

    [rst next];

    NSLog(@"PRINT FIRST QUOTE_ID = %d", [rst intForColumn:@"QUOTE_ID"]);

    NSInteger nextId = [rst intForColumnIndex:0];
    [database close];

    NSLog(@"NEW QUOTE_ID = %ld", (long)nextId);

    //    NSInteger myInt = [nextSubId intValue];

    return nextId;

    //    [maxSubjectId release];

}


- (void) saveAllData {

    if(isDirty) {

        QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];
        FMDatabase *database = [FMDatabase databaseWithPath:appDelegate.getDBPath];    

        if (self.quote_id > 0){

            if ([database open]) {

                NSLog(@"QUOTE_ID/DESC1/DESC2/EXCERPT = %@ / %@ / %@ / %@", self.quote_id , self.title, self.desc2, self.excerpt);

                [database executeUpdate:@"update QUOTE Set desc1 = ?, desc2 = ?, date = ?, excerpt = ? where quote_id = ?", 
                 self.title, self.desc2, self.quote_date, self.excerpt, self.quote_id];

                [database close];
            }

            isDirty = NO;
        }

    }

}

@end

以下是观点：

@implementation RootViewController

@synthesize categories, qmv,  selectedQuote, selectedSubject, subjects, allCategories, allSubjects, mySection, myRow, checkedIndexPath;

@synthesize svc, selectedTabs;

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}


#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];

    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] 
                                             initWithBarButtonSystemItem:UIBarButtonSystemItemAdd 
                                             target:self action:@selector(addItem:)];

    UIBarButtonItem *searchButton         = [[UIBarButtonItem alloc]
                                             initWithBarButtonSystemItem:UIBarButtonSystemItemSearch
                                             target:self
                                             action:@selector(searchItem:)];

    UIBarButtonItem *editButton          = [[UIBarButtonItem alloc] 
                                             initWithBarButtonSystemItem:UIBarButtonSystemItemEdit
                                             target:self action:@selector(editItem:)];

    self.navigationItem.rightBarButtonItems =
    [NSArray arrayWithObjects:editButton, searchButton, nil];

    //Initialize our table data source
    allCategories = [[NSMutableArray alloc] init];
    allSubjects = [[NSMutableArray alloc] init];
    categories = [[NSMutableArray alloc] init];
    subjects = [[NSMutableArray alloc] init];
    selectedTabs = [[NSMutableArray alloc] init];

    QuotesAppDelegate *appDelegate = (QuotesAppDelegate *)[[UIApplication sharedApplication] delegate];
    self.categories = [appDelegate activeCategories];
    self.subjects = [appDelegate activeSubjects];
    self.allCategories = [appDelegate categories];
    self.allSubjects = [appDelegate subjects];
    self.navigationItem.title = @"Categories";

    [searchButton release];
    [editButton release];

}

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:animated];
    [self.tableView reloadData];

}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

//- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section 
//{
//    return @"Category List";
//}


- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 
{

    NSUInteger count = [self.categories count];
    NSLog(@"~~~numberOfRowsInSection: %lu", (unsigned long)count);

    return self.categories.count;

}        

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) 
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    }

    if(self.categories.count>0)
    {

        Category *cat = [self.categories objectAtIndex:indexPath.row];
        NSLog(@"         category title = %@", cat.category_title);
        cell.textLabel.text = cat.category_title;

    } 
    else 
    {

        NSLog(@"      ERROR: self.categories has no objects in it!!!!");

    }

    return cell;
}

另请查看下面的日志。看起来在加载数据时随机调用视图。这可能与视图未显示所有显示的数据的原因有关。

2015-11-07 16:13:23.889 Quotes[11795:757246] getInitialDataToDisplay is loading data...
2015-11-07 16:13:23.896 Quotes[11795:757246] appDelegate.quotes --- 1
2015-11-07 16:13:23.897 Quotes[11795:757246] appDelegate.quotes --- 2
2015-11-07 16:13:23.898 Quotes[11795:757246] appDelegate.quotes --- 3
2015-11-07 16:13:23.898 Quotes[11795:757246] appDelegate.quotes --- 4
2015-11-07 16:13:23.899 Quotes[11795:757246] appDelegate.quotes --- 5
2015-11-07 16:13:23.900 Quotes[11795:757246] appDelegate.quotes --- 6
2015-11-07 16:13:23.900 Quotes[11795:757246] appDelegate.quotes --- 7
2015-11-07 16:13:23.900 Quotes[11795:757246] appDelegate.quotes --- 8
2015-11-07 16:13:23.901 Quotes[11795:757246] appDelegate.quotes --- 9
2015-11-07 16:13:23.901 Quotes[11795:757246] appDelegate.quotes --- 10
2015-11-07 16:13:23.902 Quotes[11795:757246] appDelegate.quotes --- 11
2015-11-07 16:13:23.903 Quotes[11795:757246] appDelegate.quotes --- 12
2015-11-07 16:13:23.903 Quotes[11795:757246] appDelegate.quotes --- 13
2015-11-07 16:13:23.904 Quotes[11795:757246] appDelegate.quotes --- 14
2015-11-07 16:13:23.904 Quotes[11795:757246] appDelegate.quotes --- 15
2015-11-07 16:13:23.906 Quotes[11795:757246] appDelegate.quotes --- 16
2015-11-07 16:13:23.906 Quotes[11795:757246] appDelegate.quotes --- 17
2015-11-07 16:13:23.906 Quotes[11795:757246] appDelegate.quotes --- 18
2015-11-07 16:13:23.907 Quotes[11795:757246] appDelegate.quotes --- 19
2015-11-07 16:13:23.907 Quotes[11795:757246] appDelegate.quotes --- 20
2015-11-07 16:13:23.908 Quotes[11795:757246] appDelegate.quotes --- 21
2015-11-07 16:13:23.908 Quotes[11795:757246] appDelegate.quotes --- 22
2015-11-07 16:13:23.910 Quotes[11795:757246] appDelegate.quotes --- 23
2015-11-07 16:13:23.910 Quotes[11795:757246] appDelegate.quotes --- 24
2015-11-07 16:13:23.911 Quotes[11795:757246] appDelegate.quotes --- 25
2015-11-07 16:13:23.911 Quotes[11795:757246] appDelegate.quotes --- 26
2015-11-07 16:13:23.912 Quotes[11795:757246] appDelegate.quotes --- 27
2015-11-07 16:13:23.912 Quotes[11795:757246] appDelegate.quotes --- 28
2015-11-07 16:13:23.913 Quotes[11795:757246] appDelegate.quotes --- 29
2015-11-07 16:13:23.913 Quotes[11795:757246] appDelegate.quotes --- 30
2015-11-07 16:13:23.913 Quotes[11795:757246] appDelegate.quotes --- 31
2015-11-07 16:13:23.914 Quotes[11795:757246] appDelegate.quotes --- 32
2015-11-07 16:13:23.914 Quotes[11795:757246] appDelegate.quotes --- 33
2015-11-07 16:13:23.915 Quotes[11795:757246] appDelegate.quotes --- 34
2015-11-07 16:13:23.915 Quotes[11795:757246] appDelegate.quotes --- 35
2015-11-07 16:13:23.916 Quotes[11795:757246] appDelegate.quotes --- 36
2015-11-07 16:13:23.916 Quotes[11795:757246] appDelegate.quotes --- 37
2015-11-07 16:13:23.916 Quotes[11795:757246] appDelegate.quotes --- 38
2015-11-07 16:13:23.917 Quotes[11795:757246] appDelegate.quotes --- 39
2015-11-07 16:13:23.917 Quotes[11795:757246] appDelegate.quotes --- 40
2015-11-07 16:13:23.918 Quotes[11795:757246] appDelegate.quotes --- 41
2015-11-07 16:13:23.918 Quotes[11795:757246] appDelegate.quotes --- 42
2015-11-07 16:13:23.918 Quotes[11795:757246] appDelegate.quotes --- 43
2015-11-07 16:13:23.919 Quotes[11795:757246] appDelegate.quotes --- 44
2015-11-07 16:13:23.919 Quotes[11795:757246] appDelegate.quotes --- 45
2015-11-07 16:13:23.920 Quotes[11795:757246] appDelegate.quotes --- 46
2015-11-07 16:13:23.920 Quotes[11795:757246] appDelegate.quotes --- 47
2015-11-07 16:13:23.922 Quotes[11795:757246] appDelegate.quotes --- 48
2015-11-07 16:13:23.922 Quotes[11795:757246] appDelegate.quotes --- 49
2015-11-07 16:13:23.922 Quotes[11795:757246] appDelegate.quotes --- 50
2015-11-07 16:13:23.923 Quotes[11795:757246] appDelegate.quotes --- 51
2015-11-07 16:13:23.923 Quotes[11795:757246] appDelegate.quotes --- 52
2015-11-07 16:13:23.924 Quotes[11795:757246] appDelegate.quotes --- 53
2015-11-07 16:13:23.924 Quotes[11795:757246] appDelegate.quotes --- 54
2015-11-07 16:13:23.924 Quotes[11795:757246] appDelegate.quotes --- 55
2015-11-07 16:13:23.925 Quotes[11795:757246] appDelegate.quotes --- 56
2015-11-07 16:13:23.925 Quotes[11795:757246] appDelegate.quotes --- 57
2015-11-07 16:13:23.925 Quotes[11795:757246] appDelegate.quotes --- 58
2015-11-07 16:13:23.926 Quotes[11795:757246] appDelegate.quotes --- 59
2015-11-07 16:13:23.926 Quotes[11795:757246] appDelegate.quotes --- 60
2015-11-07 16:13:23.927 Quotes[11795:757246] appDelegate.quotes --- 61
2015-11-07 16:13:23.928 Quotes[11795:757246] appDelegate.quotes --- 62
2015-11-07 16:13:23.928 Quotes[11795:757246] appDelegate.quotes --- 63
2015-11-07 16:13:23.928 Quotes[11795:757246] appDelegate.quotes --- 64
2015-11-07 16:13:23.929 Quotes[11795:757246] appDelegate.quotes --- 65
2015-11-07 16:13:23.929 Quotes[11795:757246] appDelegate.quotes --- 66
2015-11-07 16:13:23.929 Quotes[11795:757246] appDelegate.quotes --- 67
2015-11-07 16:13:23.930 Quotes[11795:757246] appDelegate.quotes --- 68
2015-11-07 16:13:23.930 Quotes[11795:757246] appDelegate.quotes --- 69
2015-11-07 16:13:23.931 Quotes[11795:757246] appDelegate.quotes --- 70
2015-11-07 16:13:23.931 Quotes[11795:757246] appDelegate.quotes --- 71
2015-11-07 16:13:23.931 Quotes[11795:757246] appDelegate.quotes --- 72
2015-11-07 16:13:23.932 Quotes[11795:757246] appDelegate.quotes --- 73
2015-11-07 16:13:23.933 Quotes[11795:757246] appDelegate.quotes --- 74
2015-11-07 16:13:23.933 Quotes[11795:757246] appDelegate.quotes --- 75
2015-11-07 16:13:23.933 Quotes[11795:757246] appDelegate.quotes --- 76
2015-11-07 16:13:23.934 Quotes[11795:757246] appDelegate.quotes --- 77
2015-11-07 16:13:23.934 Quotes[11795:757246] appDelegate.quotes --- 78
2015-11-07 16:13:23.935 Quotes[11795:757246] appDelegate.quotes --- 79
2015-11-07 16:13:23.935 Quotes[11795:757246] appDelegate.quotes --- 80
2015-11-07 16:13:23.936 Quotes[11795:757246] appDelegate.quotes --- 81
2015-11-07 16:13:23.936 Quotes[11795:757246] appDelegate.quotes --- 82
2015-11-07 16:13:23.937 Quotes[11795:757246] appDelegate.quotes --- 83
2015-11-07 16:13:23.937 Quotes[11795:757246] appDelegate.quotes --- 84
2015-11-07 16:13:23.937 Quotes[11795:757246] appDelegate.quotes --- 85
2015-11-07 16:13:23.938 Quotes[11795:757246] appDelegate.quotes --- 86
2015-11-07 16:13:23.939 Quotes[11795:757246] appDelegate.quotes --- 87
2015-11-07 16:13:23.939 Quotes[11795:757246] appDelegate.quotes --- 88
2015-11-07 16:13:23.940 Quotes[11795:757246] appDelegate.quotes --- 89
2015-11-07 16:13:23.940 Quotes[11795:757246] appDelegate.quotes --- 90
2015-11-07 16:13:23.940 Quotes[11795:757246] appDelegate.quotes --- 91
2015-11-07 16:13:23.941 Quotes[11795:757246] appDelegate.quotes --- 92
2015-11-07 16:13:23.942 Quotes[11795:757246] appDelegate.quotes --- 93
2015-11-07 16:13:23.942 Quotes[11795:757246] appDelegate.quotes --- 94
2015-11-07 16:13:23.942 Quotes[11795:757246] appDelegate.quotes --- 95
2015-11-07 16:13:23.943 Quotes[11795:757246] appDelegate.quotes --- 96
2015-11-07 16:13:23.943 Quotes[11795:757246] appDelegate.quotes --- 97
2015-11-07 16:13:23.943 Quotes[11795:757246] appDelegate.quotes --- 98
2015-11-07 16:13:23.944 Quotes[11795:757246] appDelegate.quotes --- 99
2015-11-07 16:13:23.944 Quotes[11795:757246] appDelegate.quotes --- 100
2015-11-07 16:13:23.945 Quotes[11795:757246] appDelegate.quotes --- 101
2015-11-07 16:13:23.945 Quotes[11795:757246] appDelegate.quotes --- 102
2015-11-07 16:13:40.838 Quotes[11795:757003] ~~~numberOfRowsInSection: 0
2015-11-07 16:13:40.838 Quotes[11795:757246] appDelegate.quotes --- 103
2015-11-07 16:13:43.003 Quotes[11795:757003] ~~~numberOfRowsInSection: 0
2015-11-07 16:13:43.004 Quotes[11795:757246] appDelegate.quotes --- 104
2015-11-07 16:13:43.971 Quotes[11795:757003] ~~~numberOfRowsInSection: 0
2015-11-07 16:13:43.972 Quotes[11795:757246] appDelegate.quotes --- 105
2015-11-07 16:13:43.973 Quotes[11795:757246] appDelegate.quotes --- 106
2015-11-07 16:13:43.973 Quotes[11795:757246] appDelegate.quotes --- 107
2015-11-07 16:13:43.974 Quotes[11795:757246] appDelegate.quotes --- 108
2015-11-07 16:13:43.974 Quotes[11795:757246] appDelegate.quotes --- 109
2015-11-07 16:13:43.975 Quotes[11795:757246] appDelegate.quotes --- 110
2015-11-07 16:13:43.975 Quotes[11795:757246] appDelegate.quotes --- 111
2015-11-07 16:13:43.977 Quotes[11795:757246] appDelegate.quotes --- 112
2015-11-07 16:13:43.977 Quotes[11795:757246] appDelegate.quotes --- 113
2015-11-07 16:13:43.978 Quotes[11795:757246] appDelegate.quotes --- 114
2015-11-07 16:13:43.979 Quotes[11795:757246] appDelegate.quotes --- 115
2015-11-07 16:13:43.979 Quotes[11795:757246] appDelegate.quotes --- 116
2015-11-07 16:13:43.980 Quotes[11795:757246] appDelegate.quotes --- 117
2015-11-07 16:13:43.980 Quotes[11795:757246] appDelegate.quotes --- 118
2015-11-07 16:13:44.971 Quotes[11795:757003] ~~~numberOfRowsInSection: 0
2015-11-07 16:13:44.972 Quotes[11795:757246] appDelegate.quotes --- 119
2015-11-07 16:13:45.618 Quotes[11795:757003] ~~~numberOfRowsInSection: 0
2015-11-07 16:13:45.619 Quotes[11795:757246] appDelegate.quotes --- 120
2015-11-07 16:13:45.620 Quotes[11795:757246] appDelegate.quotes --- 121
2015-11-07 16:13:45.620 Quotes[11795:757246] appDelegate.quotes --- 122

Answer 1

您需要覆盖Quote的init方法。

- (instancetype)init {
    self = [super init];
    if (self) {
        // initialize member variables here
        _quote_id = nil;
        // etc...
    }
    return self;
}

Answer 2

看起来您正在尝试在后台创建数据的初始更新，如果您之后立即重新加载UITableView的数据，那么数组中几乎没有任何数据，因为值得到了背景。当你拥有所有的值时，在你的后台线程调用中：

dispatch_async(dispatch_get_main_queue(), ^{ [self.tableView reloadData]; });

当您拥有数组中的所有值时，您需要在后台方法的末尾调用它，否则您将不会拥有数组中的所有内容/任何内容，并且它将显示没有数据。你回去后获得数据的原因是因为你在viewWillAppear方法中调用reloadData，那时它必须在后台获得所有值。

编辑：

在你的QuoteDelegate.m文件中，当你完成更新所有数组时，你会想要调用它（userInfoDictionary是你希望对响应通知的方法可用的任何信息的NSDictionary）：

[[NSNotificationCenter defaultCenter]postNotificationName:@"YourNotificationName" object:nil userInfo:userInfoDictionary];

在RootViewController.m文件中的viewDidLoad方法中调用：

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(yourCustomMethodToImplementReloadDataIn) name:@"YourNotificationName" object:nil];

然后在你所谓的“yourCustomMethodToImplementReloadDataIn”中，只需调用它，你就可以得到你想要的结果：

[self.tableView reloadData];

Xcode 7更新后，RootViewController不会填充

2 个答案: