集合之間的轉換

1、NSArray轉換成NSMutablearray

NSString *array = @[@“”，@“”，@“”，@“”];

NSMutaleArray *muarray = [NSMutablearray arrayWithArray:array];

 

2、NSDictonary 轉換成 NSMutableDictionary

NSDictionarry *dic = @{@“one”：@“1”，@“two”：@“12”}

NSMutableDictionary *mDic = [NSMutableDictionarry dictionarryWithDictionarry：dic];

 

3、NSset 轉成NSMutableSet

NSSet *set = [[NSSet alloc] initWitheObjects:@“a”，@“d”，nil];

NSMutableSet *muSet = [NSMutableSet setWithSet:set];

 

4、NSArray 轉成NSSet

NSMutableSet*muSet2 = [NSMutableSet setWithArray:array];

 

5、NSDitionary 轉成NSArray

NSArray *allkeys = [dic allkeys];

NSArray *allValues = [dic allValues];

 

6、字符串转成数组

NSString *str = @“awww”;

NSArray *strArray = [str componetsSeparateByString:@“.”];