Read PList File

Question

I've a Plist File composed like this:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>1</key>
    <dict>
        <key>2</key>
        <array>
            <array>
                <string>a</string>
                <integer>1</integer>
            </array>
            <array>
                <string>b</string>
                <integer>0</integer>
            </array>
            <array>
                <string>c</string>
                <string>0</string>
            </array>
        </array>
    </dict>
</dict>
</plist>

I try to read this file but I don't understand where is the error:

NSError *error;

    NSMutableArray *result=[[NSMutableArray alloc] initWithCapacity:1];

    NSString *pList = @"a.plist"; //

    NSString *plistPath;

    //path

    NSString *rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

    plistPath = [rootPath stringByAppendingPathComponent:pList];

    //check if the path exist

    BOOL success;

    NSFileManager *fileManager = [NSFileManager defaultManager];

    success = [fileManager fileExistsAtPath:plistPath];

    if (!success) {

        NSString *path = [[NSBundle mainBundle] pathForResource:pList ofType:@""];

        [fileManager copyItemAtPath:path toPath:plistPath error:&error];
        NSLog(@"error");
    }

    //read the dictionary

    NSDictionary *temp = [[NSDictionary alloc] initWithContentsOfFile:plistPath];

    //get value for key of the dictionary



    result=[temp valueForKey:@"1"];



    NSMutableArray *tmp = [result objectAtIndex:1]; //this give me error

    NSLog(@"n %d", [tmp count]);

    ...

    if(!temp) [temp release];

Answer 1

In the root dictionary, the key 1 points to a dictionary. You are trying to assign it to result which is an NSMutableArray variable. So you are getting the error. Also, you are creating allocating an instance to result and then reassigning it. This is a memory leak. The array you will be getting from the plist will be an immutable one. You will have to create a mutable copy if you intend to make changes to it.