访问UIDatePicker时EXC_BAD_ACCESS
我想从我的DatePicker中读取值并将其存储在我的单例中，但在尝试执行此操作时遇到exception。
这里是单例界面：
@interface Helper : NSObject { NSMutableArray *array; //Information For Filter page NSMutableArray *towns; NSMutableArray *types; //Shared resources to apply filters NSDate *toDate; NSDate *fromDate; NSString *selectedType; NSString *selectedTown; //Shared resource of which button was clicked int clicked; int clickedCell; int clickedContext; } @property (nonatomic, retain) NSMutableArray *array; @property (nonatomic, retain) NSMutableArray *towns; @property (nonatomic, retain) NSMutableArray *types; @property (nonatomic) int clicked; @property (nonatomic) int clickedCell; @property (nonatomic) int clickedContext; @property (nonatomic, retain) NSDate *toDate; @property (nonatomic, retain) NSDate *fromDate; @property (nonatomic, retain) NSString *selectedType; @property (nonatomic, retain) NSString *selectedTown; +(id)sharedManager; @end 这是发生exception的function
-(void) viewWillDisappear:(BOOL)animated { Helper *myHelper = [Helper sharedManager]; if(myHelper.clickedContext == 0) { if(myHelper.clickedCell == 0) { //causes exception myHelper.fromDate = [self.fromDatePicker date]; } else { //causes exception myHelper.toDate = [self.toDatePicker date]; } } else { if(myHelper.clickedCell == 0) { myHelper.selectedTown = [myHelper.towns objectAtIndex:[self.townPicker selectedRowInComponent:0]]; } else { myHelper.selectedType = [myHelper.types objectAtIndex:[self.typePicker selectedRowInComponent:0]]; } } [super viewWillDisappear:animated]; }
申报人的声明
@property (nonatomic, retain) IBOutlet UIDatePicker *toDatePicker; @property (nonatomic, retain) IBOutlet UIDatePicker *fromDatePicker; @property (nonatomic, retain) IBOutlet UIPickerView *typePicker; @property (nonatomic, retain) IBOutlet UIPickerView *townPicker;
@synthesize部分
@synthesize typePicker, toDatePicker, fromDatePicker, townPicker, townsView, toDateView, typesView, fromDateView;
任何想法是为什么？
谢谢
如果您的sockets未在界面生成器中分配，则可能发生这种情况。
如果您认为是这样，请尝试使用NSZombieEnabled = YES运行应用程序，然后查看是否收到任何错误消息。
我发现了这个问题。 在我的帮手类，我应该分配不保留。 所以应该是
@property (nonatomic, assign) NSDate *toDate; @property (nonatomic, assign) NSDate *fromDate;