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

错误：

 NSMutableDictionary*muDic=

[[NSUserDefaults standardUserDefaults]objectForKey:@"userInfo"]；

 

改成：

 NSMutableDictionary*muDic=[[NSMutableDictionary alloc]initWithDictionary:[[NSUserDefaults standardUserDefaults]objectForKey:@"userInfo"]];