因为我还在学习，所以你必须对我很轻松，但是我遇到这个线程错误弹出一次，我点击了“登录Facebook”按钮。这个项目用于“Tinder”或“Hot or Not”克隆，我还处于起步阶段。如果有人能解释我的错误，我真的很感激......
2014-02-10 14:27:37.629 MatchedUp[38775:70b] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Found a circular dependency when saving.'
*** First throw call stack:
(
0 CoreFoundation 0x028115e4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x025948b6 objc_exception_throw + 44
2 CoreFoundation 0x028113bb +[NSException raise:format:] + 139
3 MatchedUp 0x00006417 +[PFObject(Private) collectDirtyChildren:children:files:seen:seenNew:] + 1174
4 MatchedUp 0x00006200 +[PFObject(Private) collectDirtyChildren:children:files:seen:seenNew:] + 639
5 MatchedUp 0x000064c5 +[PFObject(Private) collectDirtyChildren:children:files:seen:seenNew:] + 1348
6 MatchedUp 0x00006200 +[PFObject(Private) collectDirtyChildren:children:files:seen:seenNew:] + 639
7 MatchedUp 0x000065b5 +[PFObject(Private) collectDirtyChildren:children:files:] + 118
8 MatchedUp 0x00007385 +[PFObject(Private) deepSaveAsync:withSessionToken:] + 204
9 MatchedUp 0x0000890d -[PFObject(Private) saveChildrenAsync:] + 79
10 MatchedUp 0x0000ba48 -[PFObject(Private) saveAsync:] + 151
11 MatchedUp 0x0000b94d __30-[PFObject(Private) saveAsync]_block_invoke + 43
12 MatchedUp 0x0007d0c0 -[PFTaskQueue enqueue:] + 193
13 MatchedUp 0x0000b91b -[PFObject(Private) saveAsync] + 104
14 MatchedUp 0x0000dbf3 -[PFObject saveInBackgroundWithBlock:] + 34
15 MatchedUp 0x00004741 __45-[AGLoginViewController uploadPFFileToParse:]_block_invoke + 321
16 MatchedUp 0x0007c7b4 __53-[PFTask thenCallBackOnMainThreadWithBoolValueAsync:]_block_invoke + 98
17 MatchedUp 0x0007c537 __40-[PFTask thenCallBackOnMainThreadAsync:]_block_invoke_2 + 241
18 libdispatch.dylib 0x02dd57f8 _dispatch_call_block_and_release + 15
19 libdispatch.dylib 0x02dea4b0 _dispatch_client_callout + 14
20 libdispatch.dylib 0x02dd875e _dispatch_main_queue_callback_4CF + 340
21 CoreFoundation 0x02876a5e __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 14
22 CoreFoundation 0x027b76bb __CFRunLoopRun + 1963
23 CoreFoundation 0x027b6ac3 CFRunLoopRunSpecific + 467
24 CoreFoundation 0x027b68db CFRunLoopRunInMode + 123
25 GraphicsServices 0x038889e2 GSEventRunModal + 192
26 GraphicsServices 0x03888809 GSEventRun + 104
27 UIKit 0x01302d3b UIApplicationMain + 1225
28 MatchedUp 0x000051ad main + 141
29 libdyld.dylib 0x0307c70d start + 1
30 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)
这是我的代码：
//
// AGLoginViewController.m
// MatchedUp
//
// Created by AG on 1/30/14.
// Copyright (c) 2014 Alex Gartenberg. All rights reserved.
//
#import "AGLoginViewController.h"
@interface AGLoginViewController ()
@property (strong, nonatomic) IBOutlet UIActivityIndicatorView *activityIndicator;
@property (strong, nonatomic) NSMutableData *imageData;
@end
@implementation AGLoginViewController
- (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.
self.activityIndicator.hidden = YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark
- (IBAction)loginButtonPressed:(UIButton *)sender
{
self.activityIndicator.hidden = NO;
[self.activityIndicator startAnimating];
NSArray *permissionsArray = @[@"user_about_me", @"user_interests", @"user_relationships", @"user_birthday", @"user_location", @"user_relationship_details"];
[PFFacebookUtils logInWithPermissions:permissionsArray block:^(PFUser *user, NSError *error) {
[self.activityIndicator stopAnimating];
self.activityIndicator.hidden = YES;
if (!user) {
if (!error) {
UIAlertView *alertview = [[UIAlertView alloc] initWithTitle:@"Login Error" message:@"Facebook Login was not successful" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles: nil];
[alertview show];
}
else {
UIAlertView *alertview = [[UIAlertView alloc] initWithTitle:@"Login Error" message:[error description] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil];
[alertview show];
}
}
else{
[self updateUserInformation];
[self performSegueWithIdentifier:@"loginToTabBarSegue" sender:self];
}
}];
}
#pragma mark - Helper Method
-(void)updateUserInformation
{
FBRequest *request = [FBRequest requestForMe];
[request startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
if (!error) {
NSDictionary *userDictionary = (NSDictionary *)result;
//create URL
NSString *facebookID = userDictionary[@"id"];
NSURL *pictureURL = [NSURL URLWithString:[NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large&return_ssl_resources=1", facebookID]];
NSMutableDictionary *userProfile = [[NSMutableDictionary alloc] initWithCapacity:8];
if (userDictionary[@"name"]){
userProfile[kCCUserProfileNameKey] = userDictionary[@"name"];
}
if (userDictionary[@"first_name"]){
userProfile[kCCUserProfileFirstNameKey] = userDictionary[@"first_name"];
}
if (userDictionary[@"location"][@"name"]){
userProfile[kCCUserProfileLocationKey] = userDictionary[@"location"][@"name"];
}
if (userDictionary[@"gender"]){
userProfile[kCCUserProfileGenderKey] = userDictionary[@"gender"];
}
if (userDictionary[@"birthday"]){
userProfile[kCCUserProfileBirthdayKey] = userDictionary[@"birthday"];
}
if (userDictionary[@"interested_in"]){
userProfile[kCCUserProfileInterestedInKey] = userDictionary[@"interested_in"];
}
if ([pictureURL absoluteString]) {
userProfile[kCCUserProfilePictureURL] = [pictureURL absoluteString];
}
[[PFUser currentUser] setObject:userProfile forKey:@"profile"];
[[PFUser currentUser] saveInBackground];
[self requestImage];
}
else {
NSLog(@"Error in Facebook Request %@", error);
}
}];
}
-(void)uploadPFFileToParse:(UIImage *)image
{
NSData *imageData = UIImageJPEGRepresentation(image, 0.8);
if (!imageData) {
NSLog(@"image data was not found");
return;
}
PFFile *photoFile = [PFFile fileWithData:imageData];
[photoFile saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
if (succeeded) {
PFObject *photo = [PFObject objectWithClassName:kCCPhotoClassKey];
[photo setObject:[PFUser currentUser] forKey:kCCPhotoUserKey];
[photo setObject:photo forKey:kCCPhotoPictureKey];
[photo saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
NSLog(@"Photo Saved Successfully");
}];
}
}];
}
-(void)requestImage
{
PFQuery *query = [PFQuery queryWithClassName:kCCPhotoClassKey];
[query whereKey:kCCPhotoUserKey equalTo:[PFUser currentUser]];
[query countObjectsInBackgroundWithBlock:^(int number, NSError *error) {
if (number ==0)
{
PFUser *user = [PFUser currentUser];
self.imageData = [[NSMutableData alloc] init];
NSURL *profilePictureURL = [NSURL URLWithString:user[kCCUserProfileKey][kCCUserProfilePictureURL]];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:profilePictureURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:4.0f];
NSURLConnection *urlConnection = [[NSURLConnection alloc] initWithRequest:urlRequest delegate:self];
if (!urlConnection) {
NSLog(@"Failed to Download Picture");
}
}
}];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.imageData appendData:data];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
UIImage *profileImage = [UIImage imageWithData:self.imageData];
[self uploadPFFileToParse:profileImage];
}
@end
答案 0 :(得分：4)
在这一行：
[photo setObject:photo forKey:kCCPhotoPictureKey];
您将photo对象设置为引用自身。我猜这是一个错字，创建了循环引用，你真的想要：
[photo setObject:photoFile forKey:kCCPhotoPictureKey];