objective-c - -[UITableView _endCellAnimationsWithContext :] 中的断言失败

Question

希望这将是一个快速修复。我一直在试图找出我不断遇到的错误。错误在下面列出，appdelagate 在下面。

感谢任何帮助。

谢谢

2012-04-12 21:11:52.669 Chanda[75100:f803] --- Assertion failure in -[UITableView _endCellAnimationsWithContext:], /SourceCache/UIKit_Sim/UIKit-1914.84/UITableView.m:1037 2012-04-12 21:11:52.671 Chanda[75100:f803] --- Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid update: invalid number of rows in section 0. The number of rows contained in an existing section after the update (2) must be equal to the number of rows contained in that section before the update (2), plus or minus the number of rows inserted or deleted from that section (1 inserted, 0 deleted) and plus or minus the number of rows moved into or out of that section (0 moved in, 0 moved out).'

#import "AppDelegate.h"

@implementation AppDelegate

@synthesize window = _window;
@synthesize databaseName,databasePath; 

- (BOOL)application: (UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions {
    self.databaseName = @"Customers.db";

    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentDir = [documentPaths objectAtIndex:0];
    self.databasePath = [documentDir stringByAppendingPathComponent:self.databaseName];
    [self createAndCheckDatabase];

    return YES;
}

- (void)createAndCheckDatabase {
    BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];
    success = [fileManager fileExistsAtPath:databasePath];

    if (success) return; 

    NSString *databasePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:self.databaseName];

    [fileManager copyItemAtPath:databasePathFromApp toPath:databasePath error:nil];
}

@end

Answer 1

我看不出您向我们展示这部分代码的原因。您的错误必须与我假设的代码中的这一部分有关

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;

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

您可能在其中一种数据源方法中犯了错误。目前不可能说出究竟是什么问题，但我认为可能是这样的:您正在告诉 numberOfRowsInSection 中的 TableView 您希望保留 n 行并且设置并在 cellForRowAtIndexPath 中，然后您只处理 n - 1 行。

很抱歉，这个答案可能不够准确。如果您向我们展示您对数据源的实现，则更容易了解发生了什么。