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我有一個選項卡式應用程序。在故事板中，其中一個選項卡是導航控制器。在根視圖上，UIImagePickerController彈出，以便用戶可以拍攝或選擇一張照片。Push ViewController生成運行時異常
/*SnapItViewController.m*/
#import "SnapItViewController.h"
#import "FirstViewController.h"
#import "CollectionListViewController.h"
#import <sys/utsname.h>
@interface SnapItViewController()
@end
@implementation SnapItViewController
@synthesize fetchedResultsController;
@synthesize currentLocation;
#pragma mark View lifecycle
- (void)awakeFromNib
{
// Listen to takePicture notifications
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(TakePicture) name:@"takePicture" object:nil];
[super awakeFromNib];
}
- (void)viewDidLoad {
[super viewDidLoad];
ipc = [[UIImagePickerController alloc] init];
ipc.delegate = self;
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
{
ipc.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:ipc animated:YES completion:NULL];
}else{
ipc.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
//launch image picker view controller
[self presentViewController:ipc animated:YES completion:nil];
}
// Do any additional setup after loading the view.
}
- (void)viewWillAppear:(BOOL)animated {
self.navigationController.navigationBarHidden = YES;
[super viewWillAppear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark - ImagePickerController Delegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage* theImage = [info objectForKey:UIImagePickerControllerOriginalImage];
if(picker.sourceType == UIImagePickerControllerSourceTypeCamera)
{
UIImageWriteToSavedPhotosAlbum(theImage, nil, nil, nil);
}
int height = -1;
if([[NSUserDefaults standardUserDefaults] integerForKey:@"reduce_image"] == 0){
height = 640;
} else if ([[NSUserDefaults standardUserDefaults] integerForKey:@"reduce_image"] == 1) {
height = 1024;
} else {
height = 1600;
}
UIImage* resizedImageForUpload = [UtilityFunctions scaleAndRotateImage:theImage maxResolution:height];
NSData* imageDataForUpload = UIImageJPEGRepresentation(resizedImageForUpload, 1); // reduced image!
NSString *userDataset = [UtilityFunctions retrieveFromUserDefaults:@"dataset"];
[self didPickImage:imageDataForUpload atLocation:currentLocation
userDataset: userDataset];
[picker dismissViewControllerAnimated:YES completion:nil];
[mLocationManager stopUpdatingLocation];
[self release];
[self dismissViewControllerAnimated:YES completion:NULL];
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
[picker dismissViewControllerAnimated:YES completion:nil];
}
- (void)pushChildControllerForCollectedLeaf:(CollectedLeaf*)theCollectedLeaf imageToUpload:(NSData*)imageToUpload animated:(BOOL)animated
{
CollectionDetailViewController* childController = [[[CollectionDetailViewController alloc]initWithNibName:@"CollectionDetailViewController" bundle:nil] autorelease];
childController.collectedLeaf = theCollectedLeaf;
//// Pass the image from image picker to Collection Detail View, and it'll handles the upload. ////
//// Set to nil for existing collections. ////
if (imageToUpload)
{
childController.imageToUpload = imageToUpload;
}
childController.hidesBottomBarWhenPushed = YES;
self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Back" style:UIBarButtonItemStylePlain target:nil action:nil];
[self.navigationController pushViewController:childController animated:animated];
}
- (void)pushChildControllerForCollectedLeaf:(CollectedLeaf*)theCollectedLeaf imageToUpload:(NSData*)imageToUpload
{
[self pushChildControllerForCollectedLeaf:theCollectedLeaf imageToUpload:imageToUpload animated:YES];
}
#pragma mark Leaflet Photo Picker Delegate
- (void)didPickImage:(NSData*)imageData atLocation:(CLLocation*)cLocation userDataset:(NSString *)userDataset
{
//// Creates a new Collected Leaf ////
CollectedLeaf* collectedLeaf = (CollectedLeaf*)[NSEntityDescription insertNewObjectForEntityForName:@"CollectedLeaf" inManagedObjectContext:[self.fetchedResultsController managedObjectContext]];
//// Stores the geo-location to mCollectedLeaf ////
if (cLocation)
{
collectedLeaf.latitude = [NSString stringWithFormat:@"%f", cLocation.coordinate.latitude];
collectedLeaf.longitude = [NSString stringWithFormat:@"%f", cLocation.coordinate.longitude];
collectedLeaf.altitude = [NSString stringWithFormat:@"%f", cLocation.altitude];
}
else
{
collectedLeaf.latitude = kGeoLocationNotAvailable;
collectedLeaf.longitude = kGeoLocationNotAvailable;
collectedLeaf.altitude = kGeoLocationNotAvailable;
}
collectedLeaf.collectedDate = [NSDate date];
collectedLeaf.selectedSpecies = kUnknownSpecies;
collectedLeaf.userDataset = userDataset;
[self pushChildControllerForCollectedLeaf:collectedLeaf imageToUpload:imageData animated:YES];
}
@end
用戶選擇照片後，會將CollectionDetailViewController推送到導航堆棧上。在方法CollectionDetailViewController中，它將CollectionDetailDataViewController推送到導航堆棧上，導航堆棧顯示UITable。
/*CollectionDetailViewController.m */
- (void)viewDidLoad
{
containerView.frame = [self largeFrame];
dataVC = [[CollectionDetailDataViewController alloc] init];
dataVC.delegate = self;
dataVC.collectedLeaf = self.collectedLeaf;
dataVC.view.frame = [self normalFrame];
[self.navigationController pushViewController:dataVC animated:NO];
[super viewDidLoad];
}
當我點擊UITable的細胞，它推動一個SpeciesViewController應用程序崩潰與Thread 1: exc_breakpoint (code=exc_i386_bpt subcode=0x0)。
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
RankedSpecies *theRankedSpecies = [fetchedResultsController objectAtIndexPath:indexPath];
SpeciesViewController* speciesController = [[[SpeciesViewController alloc]initWithNibName:@"SpeciesViewController" bundle:nil] autorelease];
speciesController.theSpecies = theRankedSpecies.Species;
[[tableView cellForRowAtIndexPath:indexPath] setSelected:NO animated:YES];
[self.navigationController pushViewController:speciesController animated:YES];
}
認爲這是一個釋放問題，我試圖註釋掉所有涉及的dealloc方法，但問題依然存在。我認爲替換pushviewcontroller添加SpeciesViewController作爲子視圖CollectionDetailDataViewController。
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
RankedSpecies *theRankedSpecies = [fetchedResultsController objectAtIndexPath:indexPath];
SpeciesViewController* speciesController = [[[SpeciesViewController alloc]initWithNibName:@"SpeciesViewController" bundle:nil] autorelease];
speciesController.theSpecies = theRankedSpecies.Species;
[[tableView cellForRowAtIndexPath:indexPath] setSelected:NO animated:YES];
[self addChildViewController:speciesController];
[self.view addSubview:speciesController.view];
[speciesController didMoveToParentViewController:self];
}
現在進入下一個視圖，但隨後的應用程序具有相同異常代碼崩潰。
我已啓用殭屍，並在斷點導航器中添加了異常斷點。我正在努力將我的代碼版本加入到git中，以便其他人可以體驗我的問題並可能確定解決方案。
錯誤印在康壽：
2017-08-30 00:14:37.034 Leaflet-US[86918:4332982] *** -[SnapItViewController retain]: message sent to deallocated instance 0x7fae4470d4c0
崩潰堆棧跟蹤： 
autorelease？你正在使用ARC？ –
我繼承了應用程序，所以一些代碼是舊的。我試圖刪除autorelease，但問題仍然存在 – Matt
你可以發佈所有的崩潰日誌？ –