NSString to String

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#ObjC
NSString *notice
#Swift
var notice:String?

NSArray,NSMutableArray to Array

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#1. 声明
#ObjC
NSMutableArray *listArray = [NSMutableArray array];
#Swift
var listArray:[String] = Array() //必须带参数类型
var listArray:[AnyObject] = Array()
#2. 增加元素
#ObjC
[listArray addObject:@"foo"];
#Swift
listArray.append("foo")

NSRange->Range

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#ObjC
NSRange range = NSMakeRange(0,10)
#Swift
Range(start: 0, end: 10)

NSDictionary,NSmutableDictionary to Dictionary

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#ObjC
NSMutableDictionary *score = [NSMutableDictionary dictionary];
#Swift
var score0:[String:String]?
var score1 = [String:String]()
var score2 = Dictionary<String,String>()
var score3 = [:]
#ObjC
NSDictionary *person = @{@"name":@"Single Dog",@"Skill":@"Swift"};
person[@“age”] = @“28”;
#Swift
var person = ["name":"Single Dog","Skill":"Swift"]
person["age"] = "28"

Random

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#ObjC
arc4random%255
#Swift
arc4random_uniform(255)
random() % 255

Selector

感觉Selector的方式不如ObjC那样有方法提示,容易写错,效率反而不如之前

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#ObjC
SEL callback = @selector(uploadCallback:)
#Swift
Selector("uploadCallback:")

id to AnyObject

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#ObjC
id sender
#Swift
var sender:Anyobject?
```
### 三元运算缩写
```swift
#ObjC
a ? : b
#Swift
a ?? b

枚举

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#ObjC
typedef NS_ENUM(NSInteger,LocationState){
LocationStateStart,
LocationStateFinish,
LocationStateFail
};
#Swift
enum LocationState {
case LocationStart, LocationFinish, LocationFail
}

Todo List

  1. Block to Closure
  2. DateFormatter
  3. nil value check
    ……

遇到继续添加,未完待续……