I store an NSMutableDictionary in a plist file. and when I read it into a property of my object, I need to be able to edit it. my properties pointer is NSMutableDictionary only, However the object which gets generated from the plist is NSDictionary.
and Now I want to be able to add more key value pairs or delete few and save again. Which I cant as it is an immutable object now.
对象根据我的模型创建。
我该怎么处理呢?
这应该做你需要做的事:
NSDictionary * dict = [NSDictionary dictionaryWithContentsOfFile: <myfilename>];
NSMutableDictionary * mutableDict = [[dict mutableCopy] autorelease];
你要做的就是做这些
NSMutableDictionary *mutableDictionary = [dictionary mutableCopy];
你只需要做一个字典的可变版本 :
NSDictionary *dictionary;
NSMutableDictionary *mutableDictionary = [dictionary mutableCopy];
For a basic app with nonconsumable in-app purchases, has anyone figured out best practices for using SKPaymentQueue s restoreCompletedTransactions? Observations I know it s recommended to always ...
I am trying to list the contents of Ringtones directory in a TableView, however, I am only getting the last file in the directory in ALL cells, instead of file per cell. This is my code: - (...
I have a UITextField that is a subview of a UITableViewCell. When my view loads, I want the text field to become first responder. I have a pointer to the text field in the table cell, so to do this I ...
I ve been working on adding in-app purchases and was able to create and test in-app purchases using Store Kit (yay!). During testing, I exercised my app in a way which caused the app to crash mid ...
In my app i have a bunch of data i store in the NSUserdefaults. This information consists of an NSObject (Object1) with NSStrings and NSNumbers and also 2 instances of yet another object (Object2). ...
Basically I m downloading images off of a webserver and then caching them to the disk, but before I do so I want to mask them. I m using the masking code everyone seems to point at which can be found ...
I m using this code to resize an image on the iPhone: CGRect screenRect = CGRectMake(0, 0, 320.0, 480.0); UIGraphicsBeginImageContext(screenRect.size); [value drawInRect:screenRect blendMode:...
Is there a simple way of allowing interaction with a button in a UIView that lies under another UIView - where there are no actual objects from the top UIView on top of the button? For instance, ...