Swift

The properties of classes and objects in Swift are divided into three types: storage properties, computed properties, and class properties.ImportFoundationclass Person {//Storage attribute must be assigned an initial value varScore1:int = -

Step one: Declare the nserror variable. Be sure to add "?", without adding or adding "!" Not even. Because optional is used, you need to use VAR instead of let.var error:nserror?Step Two: Add "&" to the variable before using

MARK:-------typedef in SWIFT--------------//Use keywords to define type aliases, similar to Typedeftypealias Nsinteger = Intvar Value:nsinteger = 45value = 12print (value);//mark:-------String--------------Let label = "the width is" let width =

Swift file: Main.swiftImport Foundation//swift call C function Desc1 ()//swift call oc//get OC class var funcclass = Root () funcclass.desc2 ()OC File: Root.h#import @interface root:nsobject-(void) desc2; @endRoot.m#import "Root.h" @implementation

Modify the Main.m file#import #import "Root.h" int main (int argc, const char * argv[]) { @autoreleasepool { Root *rt = [[Root alloc] init]; [RT desc]; } return 0;}OC File: Root.h#import //objective-c Header file If you

var button1 = UIButton (Frame:cgrectmake (100, 200, 100, 40))Button1. Settitle ("first button", ForState:UIControlState.Normal)Button1.addtarget (Self, Action: "Firstswift:", ForControlEvents:UIControlEvents.TouchUpInside)Self.view.addSubview

This article has been updated to 2.0 syntax, specifically view: one-leaf singleton modefirst, the intentionEnsure that a class is public one instance. and provides a global access point to the interview.second, the use of the scene1. Usage Scenarios

? Keyle previously learned 1 weeks of OC, but OC Foundation is infinite approach to zero, the reason is OC's grammar is sang high Xin Big Bing on Kuang, now just work and then there are some scattered time to see Swift will be here to write down

Lazy as the name implies is slow, million must not move.The same is true of a variable, which is only loaded when you first use it. All also known as lazy loading, is required to load.=========The benefits of doing this:1. Modularization, the code

Summary of Swift Basic grammar learning1. Basic1.1) Swift is also annotated with//and/* * * * * * * * * * * * * allow multiline comments.1.2) Swift uses print and println printing, its parameters are a generic type, and almost all types are

GCD package (Swift) by WusheyingOverridefuncViewdidload () {Delay(2) {println("2s later")} Lettask =Delay(5) {println("Call")}Cancel(Task)}TypealiasTask = (Cancel:Bool) ()funcDelay (Time:Nstimeinterval, Task: (), ())Task? {funcDispatch_later (Block:

Debug Print in OC/*** Custom Log*/#ifdef DEBUG#define JYLOG (...) NSLog (__va_args__)#else#define JYLOG (...)#endif in Swift I wrote a class that makes debug output call method debug. Log(Error) Import UIKitClass debug:nsobject{TODO:

http://www.cocoachina.com/bbs/read.php?tid=204294WWDC 2014 Apple again in a shocking launch of the new programming language Swift, this news before the slightest wind leaks. News release at the time, the venue exclaimed, I believe the world to watch

Variables and constants:If you want to define a variable equal to 1, just write var = 1,swift will automatically make type inference.If you want to define a constant pi equal to 3.14, just write let PI = 3.14, constants can only be assigned

Turn from: Click to open linkFrom my short experience with Swift there is three approaches to implement the Singleton pattern, support lazy Initia Lization and thread safety.These approaches might change or become redundant as the language

Local push notifications are implemented by instantiating Uilocalnotification. To implement localization push can add code implementation in Appdelegate.swift, this case is a message to the user when the app enters the background.1. First add code

http://blog.csdn.net/huangchentao/article/details/32714621Enumeration1. Enumeration syntaxUsing an enum and enclosing the definition in curly braces, the value defined in the enumeration is the member of the enumeration, and the case keyword

Declaring enumerationsenum Direction { case North case East case West case South}You can also use a caseenum Direct { case North, East, South}Using enumerationsvar dirct = Direction.East.WestRelated valuesYou can use an enumeration to

Tuples: Tuples sets multiple different values into one data (similar to the body of the data and the collection type of the array)Tuple features: You can have any value (element), the tuple's constituent values (elements) can be different types of

var test= "11111111111test"if (string.rangeofstring ("test") = nil)//note the space around! ={println ("Find")}If you want to get a location, you:var t=string.rangeofstring ("Test")Start positionT?. StartIndexEnd PositionT?. EndIndexAnother way to