* 两个NSMutableDictionary合并成一个NSMutableDictionary
解决方案:
NSMutableDictionary *targetMutableDictionary = [mutableDictionary1 copy];
[targetMutableDictionary addEntriesFromDictionary:mutableDictionary2];
* 两个NSMutableDictionary合并成一个NSMutableDictionary
解决方案:
NSMutableDictionary *targetMutableDictionary = [mutableDictionary1 copy];
[targetMutableDictionary addEntriesFromDictionary:mutableDictionary2];