CODEWITHSUNDEEP
iosobjective-csdknsdictionary
user2643580
user2643580

Reputation:

NSDictionary App Crash

Trying to read a plist and change my font color depending on the option that was selected in the following settings bundle. enter image description here

The following is how I am trying to accomplish it:

NSString *path = @"/var/mobile/Library/Preferences/NCNotes.plist";
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];
fontSize = [[dict objectForKey:@"slideSwitched"] floatValue];

if ([[dict objectForKey:@"noteColor"] valueForKey:@"Purple"]) {
   noteView.textColor = [UIColor purpleColor];
} else {
    noteView.textColor = [UIColor blackColor];
}

Any ideas why this is why my app is crashing? How do I read the values and change the color depending on what was selected?

Upvotes: 0

Views: 670

Answers (3)

Putz1103
Putz1103

Reputation: 6211

Here is some example code documented up the wazoo. Hopefully it will help you understand how these plists and dictionaries work. Everything will be based on your plist file (which could definitely be improved upon, but that's up to you as I don't know your specific situation).

Your question is "How do I find color based on user selection?" I will assume you get the user selection as an int. Something like "User selected 7".

//Load your plist dictionary
NSString *path = @"/var/mobile/Library/Preferences/NCNotes.plist";
NSDictionary *dict = [[NSDictionary alloc] initWithContentsOfFile:path];

//Get the array of validValues and the array of validTitles
NSArray *valuesArray = [dict objectForKey:@"validValues"];
NSArray *titlesArray = [dict objectForKey:@"validTitles"];

//Now get the user selected index from the validValues array
int arraySelection = -1;
for(int i = 0; i < [valuesArray count]; i++)
{
    NSNumber *number = [valuesArray objectAtIndex:i];
    if([number intValue] == userSelectedInput)
    {
        arraySelection = i;
        break;
    }
}
if(arraySelection == -1)
{
    //Not found in array
    return;
}

//Now with that index get the title of the object that the user selected
NSString *userSelectedTitle = [titlesArray objectAtIndex:arraySelection];

//Now do your checking on what the user selected based on that:
if([userSelectedTitle isEqualToString:@"Purple"])

...

You could boil this down quite a bit. Currently your validValues array is completely useless. If it were out of order or missing numbers then it would be needed, but straight counting can be achieved by the validTitles array.

Upvotes: 0

Pawan Rai
Pawan Rai

Reputation: 3444

simply you should do this with document directory

 NSString *contentPath=[[NSBundle mainBundle] pathForResource:@"PLIST_FILE_NAME" ofType:@"plist"];
NSDictionary *dictionary=[NSDictionary dictionaryWithContentsOfFile:contentPath];

write your logic after this, wait a minute , its seems like you dont have a key "noteColor" also. check your plist

Upvotes: 0

Gavin
Gavin

Reputation: 8200

It appears that the top level of your plist is an array, not a dictionary, because at the top it says "Item 1" where all of your content is within that. So you have a dictionary within an array. So you can change your code like this:

NSString *path = @"/var/mobile/Library/Preferences/NCNotes.plist";
NSArray *array = [[NSArray alloc] initWithContentsOfFile:path];
NSDictionary *dict = array[0];

You could also change the structure of your plist so that you have a dictionary as the root instead of an array.

Also, keys are supposed to be on the left-hand side and their values on the right-hand side, so I don't see a key "noteColor". You have a key "key" with a value "noteColor", so you'll need to make that correction. I'm also not seeing a "slideSwitched" key, though it might just be outside the bounds of your screenshot.

Also the following won't work:

[[dict objectForKey:@"noteColor"] valueForKey:@"Purple"]

Whatever you get from [dict objectForKey:@"noteColor"] isn't going to be a dictionary, so calling valueForKey: on that isn't going to give you what you want.

Upvotes: 1

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