Clarence Clarence - 1 month ago 21
iOS Question

-[NSDictionary initWithObjects:forKeys:]: count of objects (0) differs from count of keys (2)

I am getting the error of

-[NSDictionary initWithObjects:forKeys:]: count of objects (0) differs from count of keys (2)'

here is my code in saving the plist.

@interface setting : UIViewController{
UIDatePicker *datePicker;
IBOutlet UILabel * morningtime;
UIDatePicker *afternoonpicker;
NSString*morningtime1;
NSString*afternoontime1;
IBOutlet UILabel *afternoontime;
}
@property (nonatomic,retain) IBOutlet UIDatePicker *datePicker;
@property (strong, nonatomic) IBOutlet UIDatePicker *afternoonpicker;

@property (nonatomic, retain) IBOutlet NSString *morningtime1;

@property (nonatomic, retain) IBOutlet NSString *afternoontime1;
@property (nonatomic, retain) IBOutlet UILabel *morningtime;

@property (nonatomic, retain) IBOutlet UILabel *afternoontime;
@property (weak, nonatomic) IBOutlet UIButton *morning;




- (IBAction)savetext:(id)sender {
NSArray *paths = NSSearchPathForDirectoriesInDomains (NSDocumentDirectory, NSUserDomainMask, YES);
// get documents path
NSString *documentsPath = [paths objectAtIndex:0];
// get the path to our Data/plist file
NSString *plistPath = [documentsPath stringByAppendingPathComponent:@"Data.plist"];

self.morningtime1 = morningtime.text;
self.afternoontime1 = afternoontime.text;
NSDictionary *plistDict = [NSDictionary dictionaryWithObjects: [NSArray arrayWithObjects: morningtime1, afternoontime1, nil] forKeys:[NSArray arrayWithObjects: @"Morning", @"Afternoon", nil]];

NSString *error = nil;
// create NSData from dictionary
NSData *plistData = [NSPropertyListSerialization dataFromPropertyList:plistDict format:NSPropertyListXMLFormat_v1_0 errorDescription:&error];

// check is plistData exists
if(plistData)
{
// write plistData to our Data.plist file
[plistData writeToFile:plistPath atomically:YES];
}
else
{
NSLog(@"Error in saveData: %@", error);
}
}

Answer

morningtime1 is almost certainly nil here, prematurely ending the array list.

If you used the new array literal syntax here:

@[morningtime1, afternoontime1];

you would get a crash, because it's illegal to assign nil to an NSArray element.