Question

假设我有根视图控制器A.然后我推视图控制器B.但是在弹出B之后，它没有被释放（使用dealloc方法检查，没有调用popViewController。如果我错了请纠正我）。我已经做了很多搜索，并得出结论，最可能的原因是“对视图控制器保持对象的强引用”。

我尝试使用仪器的分配工具，使用可用的教程找出为什么我的视图控制器在popViewController之后没有被释放，或者是否有对象的强引用。

以下是我在乐器中得到的结果：

如上面的屏幕截图所示，显示的行数是我没有得到的。

我的问题是：

如何检测导致视图控制器在popViewController
如果对第一个问题的回答是“对该视图控制器持有的对象的强引用”。究竟是什么以及如何检测它？

更新：

以下是从登录屏幕导航到仪表板的代码

LoginVC.h

#import <UIKit/UIKit.h>
#import "UIPaddingLabel.h"
..
.
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@interface LoginVC : UIViewController
{
.
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@property (weak) UIPaddingLabel *errorLbl;
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.
.

@end

LoginVC.m

    #import "LoginVC.h"
    #import "Dashboard.h"
    .
    .

    @interface LoginVC ()<UITextFieldDelegate, UIAlertViewDelegate>
    {
        CALayer *layer1, *layer2;

        UIAlertAction *actionToEnable;

        ANGModal *mod;

        UILabel *errMark1, *errMark2;

        UITextField *forgotTF;

        NSString *encodedString;

        UIImageView *backImgV;
        UIView *overlay;

        BOOL shouldAnimate;

        NSOperationQueue *operationQueue;


    }
    @end

    @implementation LoginVC

    .
    .

    //if login successful

    Dashboard *dashObj = [[Dashboard alloc] initWithNibName:@"Dashboard" bundle:nil];
    self.navigationController pushViewController:dashObj animated:YES];

    .
.
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    -(void)dealloc
    {
        NSLog(@"Released... %s", __PRETTY_FUNCTION__);
    }

    @end

Dashboard.h

#import <UIKit/UIKit.h>
#import "UIPaddingLabel.h"

@interface Dashboard : UIViewController

@property (weak, nonatomic) IBOutlet UILabel *alertCountLbl;

@property (weak, nonatomic) IBOutlet UICollectionView *scheduleCV;
@property (weak, nonatomic) IBOutlet UICollectionView *courseCV;

@property (weak, nonatomic) IBOutlet UIButton *menuBtn;
@property (weak, nonatomic) IBOutlet UIButton *nextScheduleBtn;

@property (weak, nonatomic) IBOutlet UIActivityIndicatorView *spinner;

//iphone only
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property (weak, nonatomic) IBOutlet UIView *containerView;

@property (weak, nonatomic) IBOutlet UIImageView *sliderImageV;

@property (weak, nonatomic) IBOutlet UILabel *performCountLbl;
@property (weak, nonatomic) IBOutlet UIButton *performanceBtn;
@property (weak, nonatomic) IBOutlet UIButton *myBagBtn;
@property (weak, nonatomic) IBOutlet UIButton *storeBtn;
@property (weak, nonatomic) IBOutlet UIButton *groupsBtn;

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *imgSliderTopAlign;

//ipad only
@property (weak, nonatomic) IBOutlet UILabel *headTitle;

@property (weak, nonatomic) IBOutlet UILabel *monthYearLbl;
@property (weak, nonatomic) IBOutlet UIButton *calBtn;
@property (weak, nonatomic) IBOutlet UICollectionView *calendarCV;

@property (weak, nonatomic) IBOutlet UIView *scheduleV;
@property (weak, nonatomic) IBOutlet UIButton *classBtn;
@property (weak, nonatomic) IBOutlet UIButton *homeBtn;
@property (weak, nonatomic) IBOutlet UIButton *todayBtn;
@property (weak, nonatomic) IBOutlet UIButton *plannedBtn;
@property (weak, nonatomic) IBOutlet UIButton *completedBtn;
@property (weak, nonatomic) IBOutlet UICollectionView *otherCV;

@property (weak, nonatomic) IBOutlet UILabel *onlineMarker;
@property (weak, nonatomic) IBOutlet UIButton *bottomBanner;
@property (weak, nonatomic) IBOutlet UIPaddingLabel *myCourseTitle;
@property (weak, nonatomic) IBOutlet UIButton *sdCardBtn;

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *scheduleBarLeftSpace;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *calendarWd;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *otherCVBottomSpace;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *myCourseLeftSpace;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *myCourseRightSpace;


@end

Dashboard.m

#import "Dashboard.h"
.
.
.

@interface Dashboard ()<UICollectionViewDataSource, UICollectionViewDelegate, UIScrollViewDelegate, SideMenuDelegate, ANGModalDelegate, JTCalendarDelegate, RoboServicesInterfaceDelegate>


@end

@implementation Dashboard
{
    CGPoint currentOffset;

    NSArray *scheduleRecord, *subjectsRecord;

    SideMenuVC *sideMenuObj;

    CALayer *titleLayer, *scheduleLayer;

    NSString *token;

    CGFloat calCellWd, calCellHt;

    NSDate* dateSelected;
    NSUInteger displayingDay, displayingMonth, displayingYear;

    NSMutableArray *datesArr;
    NSArray *weekDaysArr;

    ANGModal *mod;

    JTCalendarMenuView *menuV;
    JTHorizontalCalendarView *horizontalContent;
    JTCalendarManager *calendarManager;

    UIView *noScheduleV;

    BOOL dateChanged;

    NSString *dbPath;

    CGFloat otherCellSize;

    UIImageView *backImgV;

    NSString *userType;

    RoboLoaderController *_loaderController;
}

.
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-(void)goBack
{
    [self.navigationController popViewControllerAnimated:YES];
}
.
.
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-(void)dealloc
{
    NSLog(@"Released... %s", __PRETTY_FUNCTION__);
}
.
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@end

谢谢！

无法使用仪器 - XCode 8找到对象的强引用

0 个答案: