瀏覽plists和設置對象

Question

我有一個資源文件（plist）添加到我的項目。我目前正在編寫某種「助手」來讀取和寫入它。我有3個get和3個set方法。第一個返回頂部的對象，第二個返回另一個字典內部的對象（參見代碼），第三個返回任意給定深度的對象，我只需指定節點名稱即可。 （我希望你能理解我）

問題出在setters上。設置「表面」對象沒有什麼大不了的，所以設置另一個字典中的對象。當我嘗試在一個深度設置一個對象時，問題就出現了。 在我寫任何其他內容之前，我會發布代碼，以便了解我在說什麼。

fullContent是包含文件的NSMutableDictionary。

//This one is easy, just return the object for the key. 
- (id)getSurfaceObjectForKey:(NSString*)key 
{ 
    return [fullContent objectForKey:key]; 
} 

//Hope you understand this one. Main parent is a string with the name of the first node. It gets a dictionary out of my plist and returns an object for key (I have a dictionary structured plist) 
- (id)getMainParentChildObjectForKey:(NSString*)key 
{ 
    NSAssert(!mainParent, @"Main parent must not be nil"); 

    return [[fullContent objectForKey:mainParent] objectForKey:key]; 
} 

//This one gets the element at any given depth I just have to pass in an array containing node names 
- (id)getObjectForKey:(NSString *)key atDepthWithChildren:(NSArray *)children 
{ 
    id depthElement = fullContent; 

    for (int i = 0; i < children.count; i++) 
     depthElement = [depthElement objectForKey:[children objectAtIndex:i]]; 

    return [depthElement objectForKey:key]; 
} 

//Sets a top (surface) object 
- (void)setSurfaceObject:(id)object ForKey:(NSString *)key 
{ 
    [fullContent setObject:object forKey:key]; 
    [self writePlistContent]; 
} 

//Sets an object inside a dictionary (mainParent - string with the name of dictionary node) 
- (void)setMainParentChildObject:(id)object forKey:(NSString *)key 
{ 
    [[fullContent objectForKey:mainParent] setObject:object forKey:key]; 
    [self writePlistContent]; //Self explanatory. I write this to file 
} 

//This is where my problem comes. How do I save this to plist without making any other changes to it? Im guessing I have to rebuild it from inside up? 
- (void)setObject:(id)object forKey:(NSString *)key atDepthWithChildren:(NSArray *)children 
{ 
    id depthElement = fullContent; 

    for (int i = 0; i < children.count; i++) 
     depthElement = [depthElement objectForKey:[children objectAtIndex:i]]; 

    [depthElement setObject:object forKey:key]; //I set the desired object but I dont know how to save it 

    for (int i = 0; i < children.count - 1; i++) 
    { 
     //Here i guess i would have to build the NSDictionary from inside out. Using a NSMutable array perhaps? 
    } 
} 

我希望你能理解我的問題。我希望我不要讓事情複雜得太多。我真的很累，現在已經接近24小時，並且不能想出解決這個問題的方法。

預先感謝您。

Answer 1

我不明白爲什麼你不只是使用：

[self writePlistContent]; 

保存它。

當然，它會保存plist的全部內容。