Problem With NSMutableArray and NSDictinary

Mumen Shabaro · 01-06-2011, 05:24 AM

Hi there,

i have the following problem i can't solve.

i have a NSMutableArray that contains about 12 NSDictionaries and i wanna save it to a plist file.

this is the code that save it

Code:

-(void)writeToPlist:(NSString*)plistFileName array:(NSMutableArray*)arrayToWrite
{
	NSString *FileNamePath = [[NSString alloc] initWithFormat:@"%@.plist",plistFileName];
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectory = [paths objectAtIndex:0];
	NSString *appSettingsPath = [documentsDirectory stringByAppendingPathComponent:FileNamePath];
	[arrayToWrite writeToFile:appSettingsPath atomically:YES];
	[FileNamePath release];
}

and this is the code that read the file after saving it

Code:

NSArray *paths1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
			NSString *documentsDirectory2 = [paths1 objectAtIndex:0];
			NSString *appSettingsPath2 = [documentsDirectory2 stringByAppendingPathComponent:@"ImageFileData.plist"];
			imageArray = [[NSMutableArray alloc] initWithContentsOfFile:appSettingsPath2];

but it doesn't work, every time i start the app i got the count of imageArray = 0 . and i checked that there is an information that wrote to the plist file.

i print the result of this statement

Code:

[arrayToWrite writeToFile:appSettingsPath atomically:YES];
NSLog(@"%@",arrayToWrite);

i got this

Code:

(
        {
        "\U0627\U0644\U0639\U064a\U0646" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/1.gif";
    },
        {
        "\U0627\U062a\U062d\U0627\U062f \U0643\U0644\U0628\U0627\U0621" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/2.png";
    },
        {
        "\U0627\U0644\U0634\U0628\U0627\U0628" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/3.gif";
    },
        {
        "\U0627\U0644\U0638\U0641\U0631\U0629" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/4.png";
    },
        {
        "\U0627\U0644\U0648\U0635\U0644" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/5.jpg";
    },
        {
        "\U0627\U0644\U062c\U0632\U064a\U0631\U0629" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/6.gif";
    },
        {
        "\U0628\U0646\U064a \U064a\U0627\U0633" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/7.png";
    },
        {
        "\U0627\U0644\U0648\U062d\U062f\U0629" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/8.gif";
    },
        {
        "\U200e\U0627\U0644\U0634\U0627\U0631\U0642\U0629" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/9.png";
    },
        {
        "\U0627\U0644\U0646\U0635\U0631" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/10.gif";
    },
        {
        "\U062f\U0628\U064a" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/11.jpg";
    },
        {
        "\U0627\U0644\U0623\U0647\U0644\U064a" = "/var/mobile/Applications/5756C245-756E-496C-A731-B23ADD2AA96C/Documents/12.gif";
    }
)

so what is the solution if u know it. thx in advance.

Duncan C · 01-06-2011, 06:54 AM

Quote:

Originally Posted by Mumen Shabaro

Hi there,

i have the following problem i can't solve.

i have a NSMutableArray that contains about 12 NSDictionaries and i wanna save it to a plist file.

this is the code that save it

Code:

-(void)writeToPlist:(NSString*)plistFileName array:(NSMutableArray*)arrayToWrite
{
	NSString *FileNamePath = [[NSString alloc] initWithFormat:@"%@.plist",plistFileName];
	NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectory = [paths objectAtIndex:0];
	NSString *appSettingsPath = [documentsDirectory stringByAppendingPathComponent:FileNamePath];
	[arrayToWrite writeToFile:appSettingsPath atomically:YES];
	[FileNamePath release];
}

and this is the code that read the file after saving it

Code:

NSArray *paths1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
			NSString *documentsDirectory2 = [paths1 objectAtIndex:0];
			NSString *appSettingsPath2 = [documentsDirectory2 stringByAppendingPathComponent:@"ImageFileData.plist"];
			imageArray = [[NSMutableArray alloc] initWithContentsOfFile:appSettingsPath2];

but it doesn't work, every time i start the app i got the count of imageArray = 0 . and i checked that there is an information that wrote to the plist file.

i print the result of this statement

Code:

[arrayToWrite writeToFile:appSettingsPath atomically:YES];
NSLog(@"%@",arrayToWrite);

so what is the solution if u know it. thx in advance.

Your code looks reasonable, and should work. The only thing I can think of is that to save an array or dictionary to a plist, every item in the object has to be a "plist object" (the list of valid object types is described in the docs.) If you put a non-plist object anywhere in the object graph, the save fails.

Mumen Shabaro · 01-06-2011, 07:42 AM

hi there, i found the problem, when i call the method

Code:

-(void)writeToPlist:(NSString*)plistFileName array:(NSMutableArray*)arrayToWrite

i was send to it the string "plistFileName" with the plist extinction. which is i'm alreday put it in the method. so the file name will be "imageFile.plist.plist"

becouse of that i wasn't able to read from it. :P :P :P

thx for everyone read my thread and thx u Duncan C for your reply