[Objective-C] 010_Foundation架構之NSSet與NSMutableSet

標籤：

在Cocoa Foundation中的NSSet和NSMutableSet ，和NSArray功能性質一樣，用於儲存物件屬於集合。但是NSSet和NSMutableSet是無序的, 保證資料的唯一性，當插入相同的資料時，不會有任何效果。

NSSet 初始化及常用操作

#import "AppDelegate.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    NSSet *students = [NSSet setWithObjects:@"小明", @"小輝", @"大雄", nil];    NSSet *teachers = [[NSSet alloc] initWithObjects:@"校長", @"副校長", @"政教主任", nil];    NSArray *array = [NSArray arrayWithObjects:@"小明", @"小輝", @"大雄",@"小李", nil];    NSSet *students_2 = [NSSet setWithArray:array];        NSLog(@"students :%@", students);    NSLog(@"teachers :%@", teachers);    NSLog(@"students_2 :%@", students_2);        //擷取集合students包含對象的個數    NSLog(@"students count :%lu", (unsigned long)students.count);        //以數組的形式擷取集合teachers中的所有對象    NSArray *allTeacher = [teachers allObjects];    NSLog(@"allObj :%@", allTeacher);        //擷取teachers中任意一對象    NSLog(@"anyObj :%@", [teachers anyObject]);        //teachers是否包含某個對象    if ([teachers containsObject:@"副校長"]) {        NSLog(@"teachers中有副校長");    }        //是否包含指定set中的對象    if ([students_2 intersectsSet:students]) {        NSLog(@"intersects");    }        //是否完全符合    if ([students_2 isEqualToSet:students]) {        NSLog(@"完全符合");    }else{        NSLog(@"完全符合？ NO。。。。。。。");    }        //是否是子集合    if ([students isSubsetOfSet:students_2]) {        NSLog(@"students isSubsetOf students_2");    }        //迭代器遍曆    NSEnumerator *enumerator = [teachers objectEnumerator];    NSObject *teacher  = [enumerator nextObject];    while (teacher != nil) {        NSLog(@"teachers中的資料: %@",teacher);        teacher = [enumerator nextObject];    }        //快速枚舉遍曆    for (NSObject *teacher in teachers) {        NSLog(@"teachers中的資料: %@",teacher);    }        return YES;}@end

 

NSMutableSet 初始化及常用操作

#import "AppDelegate.h"@interface AppDelegate ()@end@implementation AppDelegate- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {        NSMutableSet *mutableStudent = [NSMutableSet setWithObjects:@"F1", @"F2", @"F3", nil];    NSMutableSet *mutableTeacher = [NSMutableSet setWithObjects:@"B1", @"B2", @"B3", nil];    NSMutableSet *mutableStudent2 = [NSMutableSet setWithObjects:@"F1", @"F2", @"F3",@"F4", nil];        //集合元素相減    [mutableStudent2 minusSet:mutableStudent];    NSLog(@"mutableStudent2 minus mutableStudent:%@", mutableStudent2);        //mutableStudent2隻留下相等元素    [mutableStudent intersectSet:mutableStudent2];    NSLog(@"intersect :%@", mutableStudent2);        //mutableStudent合并集合    [mutableStudent unionSet:mutableStudent2];    NSLog(@"union :%@", mutableStudent);        //mutableTeacher刪除指定元素    [mutableTeacher removeObject:@"好色仙人"];    NSLog(@"removeObj :%@", mutableTeacher);        //mutableTeacher刪除所有資料    [mutableTeacher removeAllObjects];    NSLog(@"removeAll :%@", mutableTeacher);        return YES;}@end

 

 

本站文章為 寶寶巴士 SD.Team 原創，轉載務必在明顯處註明：（作者官方網站： 寶寶巴士 ) 
轉載自【寶寶巴士SuperDo團隊】 原文連結: http://www.cnblogs.com/superdo/p/4623082.html

 

 

[Objective-C] 010_Foundation架構之NSSet與NSMutableSet