从用户文档而不是 NSBundle 访问 Plist

Question

您好，我有以下完美运行的代码，它会找到 Plist 并将 NSDictionary 分配给我的名为landingSites 的NSArray。唯一的问题是我希望用户能够添加站点，因此需要将 Plist 存储在用户文档中，而不是 NSBundle:

plistPath = [[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"];
NSMutableDictionary *newDictionary = [[NSMutableDictionary alloc] initWithContentsOfFile:plistPath];
dictionaryKeys = [newDictionary allKeys];
self.landingSites = [dictionaryKeys sortedArrayUsingSelector:@selector(compare:)];
self.dictionaryFromPlist = newDictionary;

[Picker selectRow:0 inComponent:0 animated:NO];

for(NSString *parent in dictionaryKeys) 
{
    NSDictionary *parentData = [dictionaryFromPlist objectForKey:parent];
    NSArray *child = [parentData objectForKey:@"Name"];
    NSLog(@"%@", child);
}

到目前为止，我已经生成了下面的代码，但是每当我运行程序时，if 语句总是会执行，就好像 plist 从未复制到用户文档一样。另外，我不知道如何像上面那样将NSDictionary 内容附加到我的landingSites 数组中。请帮忙

 (void) viewDidLoad {
        [super viewDidLoad];
        NSError *error;
        NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,  NSUserDomainMask,YES);
        NSString *documentsDirectory = [paths objectAtIndex:0];
        NSString *path = [documentsDirectory stringByAppendingPathComponent:@"Data.plist"];
        NSFileManager *fileManager = [NSFileManager defaultManager];

        if (![fileManager fileExistsAtPath:path]) {
            NSLog(@"copying database to users documents");
            NSString *pathToSettingsBundle = [[NSBundle mainBundle] pathForResource:@"Data" ofType:@"plist"];
            [fileManager copyItemAtPath:pathToSettingsBundle toPath:path error:&error];
        }
        else{
            NSLog(@"users database already configured");
        }

Answer 1

NSArray *paths =NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory,  NSUserDomainMask,YES);

NSDocumentationDirectory 是错误的。您正在寻找NSDocumentDirectory 或NSLibraryDirectory。

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