forkey专题

iOS:NSCoder的方法decodeObjectOfClasses:forKey:

- (id)decodeObjectOfClasses:(NSSet *)classes forKey:(NSString *)key

iOS:NSCoder的方法decodeObjectOfClass:forKey:

- (id)decodeObjectOfClass:(Class)aClass forKey:(NSString *)key

-[__NSCFDictionary setObject:forKey:]: mutating method sent to immutable object' 解决方法

-[__NSCFDictionary setObject:forKey:]: mutating method sent to immutable object' 解决方法：错误：NSMutableDictionary*d =[[[NSUserDefaults standardUserDefaults] objectForKey:@"xxxx"] mutableCopy]; 修改：NS