我指的是Apple的Swift编程指南，用于理解以Swift语言创建可变/不可变对象（数组，字典，集合，数据）。但是我不明白如何在Swift中创建不可变的集合。
我想在Objective-C中看到以下Swift中的等效项
不变数组
NSArray *imArray = [[NSArray alloc]initWithObjects:@"First",@"Second",@"Third",nil];
可变数组
NSMutableArray *mArray = [[NSMutableArray alloc]initWithObjects:@"First",@"Second",@"Third",nil];
[mArray addObject:@"Fourth"];
不变字典
NSDictionary *imDictionary = [[NSDictionary alloc] initWithObjectsAndKeys:@"Value1", @"Key1", @"Value2", @"Key2", nil];
可变字典
NSMutableDictionary *mDictionary = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"Value1", @"Key1", @"Value2", @"Key2", nil];
[mDictionary setObject:@"Value3" forKey:@"Key3"];
创建不可变数组
第一种方式：
let array = NSArray(array: ["First","Second","Third"])
第二种方式：
let array = ["First","Second","Third"]
创建可变数组
var array = ["First","Second","Third"]
将对象追加到数组
array.append("Forth")
创建不可变字典
let dictionary = ["Item 1": "description", "Item 2": "description"]
创建可变字典
var dictionary = ["Item 1": "description", "Item 2": "description"]
将新的配对添加到字典
dictionary["Item 3"] = "description"
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我来说两句