How to Fix: Why NSUserDefaults failed to save NSMutableDictionary in iOS?
Fix Why NSUserDefaults failed to save NSMutableDiction. Use NSArchiver to archive the NSMutableD. Step-by-step guide included.
To save an NSMutableDictionary object in NSUserDefaults, you need to convert the object to a property list (plist) format. The issue arises because NSUserDefaults can only store objects that conform to the NSCoding protocol.
🔧 Proven Troubleshooting Steps
Method 1: Using NSKeyedArchiver
- Step 1: Create an instance of NSKeyedArchiver and set the delegate to your view controller or a subclass.
Method 2: Using NSUserDefaults' setObject:forKey:withCoder:
- Step 1: Create an instance of NSData and encode your NSMutableDictionary object using NSKeyedArchiver.
By following these steps, you should be able to successfully save your NSMutableDictionary object in NSUserDefaults.
❓ Frequently Asked Questions
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