集合之间的相互转换

// main.m

// 11-集合相互转换

// Created by apple on 14-3-21.

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])

{

@autoreleasepool {

//1.NSArray 转换成 NSMutableArray

NSArray * array = @[@"one",@"two",@"three"];

NSMutableArray * muArray = [NSMutableArray arrayWithArray:array];

NSLog(@"muarray %@",muArray);

//2.NSDictonary 转换成 NSMutableDictionary

NSDictionary * dic = @{@"one":@"1",@"two":@"2"};

NSMutableDictionary * muDic = [NSMutableDictionary dictionaryWithDictionary:dic];

NSLog(@"mudic %@ ",muDic);

//3.NSset 转换成 NSMutableSet

NSSet * set = [[NSSet alloc] initWithObjects:@"one",@"two", nil];

NSMutableSet *muSet = [NSMutableSet setWithSet:set];

NSLog(@"muSet %@",muSet);

//4.NSArray 转换成NSSet

NSMutableSet * muSet2 = [NSMutableSet setWithArray:array];

NSLog(@"muSet2 %@",muSet2);

//5.NSDictionary 转化成NSArray

NSArray * allkeys = [dic allKeys];

NSLog(@"allkeys %@",allkeys);

NSArray * allValues = [dic allValues];

NSLog(@"allValues %@",allValues);

//6.字符串转换成数组

NSString * str = @"www.itacast.cn";

NSArray * strArray = [str componentsSeparatedByString:@"."];

NSLog(@"strArray %@",strArray);

}

return 0;

}