我似乎不知道该如何解决我接收到的错误。 我点击一个将一个新的 UIT 可操作 View 控制器弹出到堆栈上的单元格。 一旦我按下导航界面的后按钮, 我在这个控制器中收到这个错误, 但调试器中似乎没有问题, 因为应用程序不会崩溃或挂挂起, 仍然正常工作 。
An instance 0x79a8400 of class UITableView was deallocated while key value observers were still registered with it. Observation info was leaked, and may even become mistakenly attached to some other object. Set a breakpoint on NSKVODeallocateBreak to stop here in the debugger. Here s the current observation info: ( Context: 0x0, Property: 0x738c010> )
代码在下面,我对其他UITView Constors使用类似的代码,但没有收到错误。
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
pull = [[PullToRefreshView alloc] initWithScrollView:(UIScrollView *) self.tableView];
[pull setDelegate:self];
[self.tableView addSubview:pull];
[tableView.dataSource self];
[tableView.delegate self];
NSString *isAuthenticated = [[NSString alloc] init];
isAuthenticated = [self retrieveUserToken:[[NSUserDefaults standardUserDefaults] valueForKey:@"email"]];
NSNumber *categorySelected = [[NSNumber alloc] init];
categorySelected = [[NSUserDefaults standardUserDefaults] valueForKey:@"category_id"];
if (![isAuthenticated length])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}else if (categorySelected ==nil)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"alert" message:@"message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}
[self getTableViewData];
}
- (void)viewDidUnload
{
[self setTableView:nil];
pull = nil;
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (NSString *)retrieveUserToken:(NSString *)user
{
NSError *error = nil;
NSString *username = user;
return [SFHFKeychainUtils getPasswordForUsername:username andServiceName:@"app" error:&error];
}
- (void)getTableViewData
{
URLSingleton *urls = [[URLSingleton alloc] init];
responseData = [NSMutableData data];
NSNumber *categoryID = [[NSNumber alloc] init];
categoryID = [[NSUserDefaults standardUserDefaults] valueForKey:@"category_id"];
NSString *urlComplete = [[NSString alloc] init];
urlComplete = [urls getEvent:categoryID];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlComplete]];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
[connection start];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return categories.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:@"cell"];
cell.textLabel.textColor = [UIColor blackColor];
cell.textLabel.text = [categories objectAtIndex:indexPath.row];
return cell;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.tableView reloadData];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message." delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[pull finishedLoading];
[alert show];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSDictionary *dictionary = [responseString JSONValue];
NSArray *response = [dictionary valueForKey:@"name"];
NSArray *responseID = [dictionary valueForKey:@"id"];
categories = [[NSMutableArray alloc] initWithArray:response];
eventID = [[NSMutableArray alloc] initWithArray:responseID];
[self.tableView performSelectorOnMainThread:@selector(reloadData) withObject:nil waitUntilDone:NO];
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
[pull finishedLoading];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *selectedCell = [self.tableView cellForRowAtIndexPath:indexPath];
NSString *cellText = selectedCell.textLabel.text;
int i = 0;
for(NSString *name in categories)
{
if ([name isEqualToString:cellText])
{
[[NSUserDefaults standardUserDefaults] setValue:[eventID objectAtIndex:i] forKey:@"event_id"];
[[NSUserDefaults standardUserDefaults] setValue:cellText forKey:@"event_name"];
[[NSUserDefaults standardUserDefaults] synchronize];
}
i++;
}
[self.tableView deselectRowAtIndexPath:indexPath animated:YES];
if(checkedIndexPath) {
UITableViewCell* uncheckCell = [self.tableView
cellForRowAtIndexPath:checkedIndexPath];
uncheckCell.accessoryType = UITableViewCellAccessoryNone;
}
UITableViewCell* cell = [self.tableView cellForRowAtIndexPath:indexPath];
cell.accessoryType = UITableViewCellAccessoryCheckmark;
checkedIndexPath = indexPath;
}
-(void)tableView:(UITableView*)tableView willBeginEditingRowAtIndexPath:(NSIndexPath *)indexPath
{
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
URLSingleton *urls = [URLSingleton sharedInstance];
NSNumber *event = [[NSNumber alloc] init];
if(editingStyle == UITableViewCellEditingStyleDelete)
{
UITableViewCell *selectedCell = [self.tableView cellForRowAtIndexPath:indexPath];
NSString *cellText = selectedCell.textLabel.text;
int i = 0;
for(NSString *name in categories)
{
if ([name isEqualToString:cellText])
{
event = [eventID objectAtIndex:i];
[eventID removeObjectAtIndex:i];
}
i++;
}
NSString *reqURL = [[NSString alloc] initWithString:[urls deleteEvent:[event stringValue]]];
NSURLRequest *delReq = [NSURLRequest requestWithURL:[NSURL URLWithString:reqURL]];
NSURLResponse *resp = nil;
NSError *err = nil;
NSData *response = [NSURLConnection sendSynchronousRequest:delReq returningResponse: &resp error: &err];
NSString *reply = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
SBJsonParser *parser = [SBJsonParser new];
id content = [reply JSONValue];
if(!content){
NSLog(@"%@", parser.errorTrace);
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
return;
}
NSNumber *status = [content valueForKey:@"success"];
NSNumber *one = [[NSNumber alloc] initWithInt:1];
if ([status isEqualToNumber:one])
{
[categories removeObjectAtIndex:indexPath.row];
[self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}else
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
}
}
}
- (void)pullToRefreshViewShouldRefresh:(PullToRefreshView *)view;
{
NSString *isAuthenticated = [[NSString alloc] init];
isAuthenticated = [self retrieveUserToken:[[NSUserDefaults standardUserDefaults] valueForKey:@"email"]];
NSNumber *categorySelected = [[NSNumber alloc] init];
categorySelected = [[NSUserDefaults standardUserDefaults] valueForKey:@"category_id"];
if (![isAuthenticated length])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}else if (categorySelected ==nil)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}
[self getTableViewData];
}
- (IBAction)createEvent:(id)sender
{
NSString *isAuthenticated = [[NSString alloc] init];
isAuthenticated = [self retrieveUserToken:[[NSUserDefaults standardUserDefaults] valueForKey:@"email"]];
NSNumber *categorySelected = [[NSNumber alloc] init];
categorySelected = [[NSUserDefaults standardUserDefaults] valueForKey:@"category_id"];
if (![isAuthenticated length])
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Message" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}else if (categorySelected == nil)
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alert" message:@"Alert" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil, nil];
[alert show];
return;
}
AddEventViewController *aevc = [self.storyboard instantiateViewControllerWithIdentifier:@"AddEventViewController"];
[self.navigationController popToViewController:aevc animated:YES];
}