objective-c가 속성 목록에서 읽을 수 없습니다.

Question

self.toDoItems = [[NSMutableArray alloc] init]; //initialize array 
self.dataFileName = @"PropertyList"; 
self.filePath = [self.dataFileName stringByAppendingString:@".plist"]; 
self.rootPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 
                  NSUserDomainMask, YES) objectAtIndex:0]; 
self.filePath = [self.rootPath stringByAppendingPathComponent:self.filePath]; 
self.NSSRootNodeName = @"ToDoList"; //name of the root node in the property list 

// if (![[NSFileManager defaultManager] fileExistsAtPath: self.filePath]) { 
//  self.filePath = [[NSBundle mainBundle] pathForResource:self.dataFileName ofType:@"plist"]; 
// } 

NSLog(@"File path: %@", self.filePath); 

// Uncomment the following line to preserve selection between presentations. 
self.clearsSelectionOnViewWillAppear = NO; 

// Uncomment the following line to display an Edit button in the navigation bar for this view controller. 
self.navigationItem.rightBarButtonItem = self.editButtonItem; 

//read xml file and load to array 
NSString *errorDesc = nil; 
NSPropertyListFormat format; 

NSData *plistXML = [[NSFileManager defaultManager] contentsAtPath:self.filePath]; 
if (plistXML==nil) { 
    NSLog(@"Error reading plistXML"); 
} 
NSDictionary *rootDictionary = (NSDictionary *)[NSPropertyListSerialization 
               propertyListFromData:plistXML 
               mutabilityOption:NSPropertyListMutableContainersAndLeaves 
               format:&format 
               errorDescription:&errorDesc]; 
if (!rootDictionary) { 
    NSLog(@"Error reading plist: %@, format: %d", errorDesc, format); 
} 

출력이 아래에 있습니다. 왜 이러한 오류가 아래에 표시되는지 잘 모르겠습니다. 내 PropertyList.plist가 내 애플리케이션의 내 문서 폴더에 있습니다. 누군가 내가 잘못하고있는 것을 지적 할 수 있습니다.

File path: /Users/Computer/Library/Application Support/iPhone Simulator/7.1/Applications/78B5F9BA-8376-4001-ACA0-936D9B4D6342/Documents/PropertyList.plist 

Error reading plistXML 
Error reading plist: stream had too few bytes, format: 0 

Answer 1

FWIW, 여기에 나를 위해 일한 것입니다 :

NSFileManager *fileManager = [[NSFileManager alloc] init]; 
if ([fileManager fileExistsAtPath: [self filePathForState]]) 
{ 
    printf("found state file\n"); 
    NSData *data = [NSData dataWithContentsOfFile:[self filePathForState]]; 
    ... 
} 
else 
{ 
    printf("no state file found\n"); 
} 
[fileManager release]; 

- (NSString *) filePathForState 
{ 
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsDirectory = [paths objectAtIndex:0]; 
    NSString *result = [documentsDirectory stringByAppendingPathComponent: @"circles06"]; 
    printf("filePathForState: %s\n", [result UTF8String]); 
    return result; 
} 

- (void) saveState 
{ 
    NSData *state = [model stateData]; 
    [state writeToFile: [self filePathForState] atomically: NO]; 
}