标签：
NSArray/NSMutableArray
NSSet/NSMutableSet
NSDictionary/NSMutableDictionary
1. 不可变有序数组：
void Array()
{
// 创建
// 快速创建的方法只适于创建不可变数组
NSArray *s = @[@"jack", @"rose", @"jerry"];
//数组对象的访问
NSLog(@"%@", s[0]);
// 快速枚举
for (NSString *obj in s){
NSLog(@"%@", obj);
}
// 枚举遍历,适可而止 [s enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if (idx == 1) {
*stop = YES;
}
NSLog(@"%@", obj);
}];
<pre name="code" class="objc"> // 数组中对象的个数
NSInteger count = s.count;
NSLog(@"count= %ld", count);}
2.不可变有序数组：创建、添加、删除、遍历等
<pre name="code" class="objc">void MutableArray()
{
// 创建
NSMutableArray *s = [NSMutableArray arrayWithObjects:@"jack", @"jerry", @"jane", nil];
// 添加对象
[s addObject:@"1"];
NSArray *array = @[@"2", @"3", @"4"];
[s addObjectsFromArray:array];
// 删除对象
[s removeObject:@"jack"];<span style="font-family: Arial, Helvetica, sans-serif;"> </span>
<span style="font-family: Arial, Helvetica, sans-serif;">// 删除所有对象</span>
[s removeAllObjects];
// 快速枚举遍历
for (NSString *obj in s) {
NSLog(@"%@", obj);
}
// 枚举遍历：根据条件停止遍历
[s enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if (idx == 4) {
*stop = YES;
}
NSLog(@"%@", obj);
}];<pre name="code" class="objc"> // 输出数组中对象个数
NSLog(@"%ld", s.count);
}
3.无序不可变集合：
void set()
{
// 创建
NSSet *s = [NSSet setWithObjects:@"1", @"2", @"3", nil];
// 随机访问
NSString *str = [s anyObject];
NSLog(@"str= %@", str);
// 快速枚举，打印出来是无序的
for (NSString *obj in s) {
NSLog(@"NSSet= %@", obj);
}<span style="font-family: Arial, Helvetica, sans-serif;"> </span>
<pre name="code" class="objc"> // 集合对象个数
NSLog(@"count= %ld", s.count);}
void mutableSet()
{
// 创建
NSMutableSet *s = [NSMutableSet setWithObjects:@"1", @"2", @"3", nil];
// 添加单个对象
[s addObject:@"4"];
// 添加多个对象
NSArray *array = @[@"5", @"6"];
[s addObjectsFromArray:array];
// 删除对象
[s removeObject:@"1"];
[s removeAllObjects];
// 枚举遍历
for (NSString *obj in s) {
NSLog(@"NSMutableSet= %@", obj);
}
}5.无序不可变字典：
<p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2">void</span> dictionary()</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;">{</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: 'PingFang SC'; color: rgb(0, 132, 0);"><span style="line-height: normal; font-family: Menlo; color: rgb(0, 0, 0);"> </span><span style="line-height: normal; font-family: Menlo;">// </span>创建</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; color: rgb(0, 132, 0);"><span style="font-variant-ligatures: no-common-ligatures; color: #000000"> </span>// <span style="line-height: normal; font-family: 'PingFang SC';">键</span> <span style="line-height: normal; font-family: 'PingFang SC';">：</span> <span style="line-height: normal; font-family: 'PingFang SC';">值（以键为索引寻找对应的值）</span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> NSDictionary *d = <span style="font-variant-ligatures: no-common-ligatures; color: #272ad8">@{</span><span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"61"</span> : <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"</span><span style="line-height: normal; font-family: 'PingFang SC'; color: rgb(209, 47, 27);">林昆</span><span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">"</span>, <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"63"</span> : <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"</span><span style="line-height: normal; font-family: 'PingFang SC'; color: rgb(209, 47, 27);">小强</span><span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">"</span>, <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"57"</span> : <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"</span><span style="line-height: normal; font-family: 'PingFang SC'; color: rgb(209, 47, 27);">小顺</span><span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">"</span>, <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"59"</span> : <span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"</span><span style="line-height: normal; font-family: 'PingFang SC'; color: rgb(209, 47, 27);">小波</span><span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">"</span><span style="font-variant-ligatures: no-common-ligatures; color: #272ad8">}</span>;</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo; min-height: 13px;"> </p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; color: rgb(0, 132, 0);"><span style="font-family: Menlo;"><span style="font-variant-ligatures: no-common-ligatures; color: #000000"> </span>// 值的</span><span style="font-family:PingFang SC;">访问</span></p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> <span style="font-variant-ligatures: no-common-ligatures; color: #bb2ca2">id</span> obj = d[<span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"61"</span>];</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> NSLog(<span style="font-variant-ligatures: no-common-ligatures; color: #d12f1b">@"61 -> %@"</span>, obj);</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"><pre name="code" class="objc"><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: 'PingFang SC'; color: rgb(0, 132, 0);"><span style="line-height: normal; font-family: Menlo; color: rgb(0, 0, 0);"> </span><span style="line-height: normal; font-family: Menlo;">// </span>输出字典的键值对数</p><p style="margin-top: 0px; margin-bottom: 0px; font-size: 11px; line-height: normal; font-family: Menlo;"> NSLog(<span style="color: rgb(209, 47, 27);">@"</span><span style="line-height: normal; font-family: 'PingFang SC'; color: rgb(209, 47, 27);">键值对数：</span><span style="color: rgb(209, 47, 27);">%ld"</span>, d.count);</p>
}
6.无序可变字典：
void mutableDictionary()
{
// 创建
NSMutableDictionary *s = [NSMutableDictionary dictionary];
// 添加键值对
[s setObject:@"林昆" forKey:@"61"];
[s setObject:@"小强" forKey:@"63"];
[s setObject:@"小顺" forKey:@"57"];
[s setObject:@"小波" forKey:@"59"];
// 删除键值对
[s removeObjectForKey:@"61"];
// 访问值对象
id obj = s[@"61"];
NSLog(@"61 -> %@", obj);
// 输出键值对数
NSLog(@"键值对：%ld", s.count);
}
7.数组对象元素是字典对象：
void arrayAndDictionary()
{
// 允许有相同的value,当不允许有相同的key
NSDictionary *d = @{@"林昆" : @"123", @"小强" : @"456", @"小顺" : @"789", @"小波" : @"123"};
// 创建不可变数组元素
// 元素对象是字典集
NSArray *s = @[@{@"Name" : @"Linkun", @"QQ" : @"1245205002", @"Favourite" : @[@"Weekness Of People", @"The World Of Commond"]},
@{@"qq1" : @"123"},
@{@"qq2" : @"234"}];
// 取值
// 键值命名不能有空格
NSString *s1 = s[0][@"QQ"];
NSLog(@"取出QQ号码：%@", s1);
NSString *s2 = s[0][@"Favourite"][0];
NSLog(@"取出喜欢的书：%@", s2);
// 快速枚举遍历
for (NSString *obj in s) {
NSLog(@"%@", obj);
}
}
标签：
原文地址：http://blog.csdn.net/sziit_jerry/article/details/51332764
