mvvm swift 4

Navigation:1. Loading the progress bar2. Navigation bar add back, Close button Load progress barThe code is as follows:Self.progressView.trackTintColor = UIColor.whiteself.progressView.progressTintColor = Uicolor.colorwithhex (value: 0x72a438, alpha:1). Withalphacomponent (0.8) Self.progressView.frame = Cgrect.init (x:0, y:0, Width: UIScreen.main.bounds.width, height:1) Self.progressView.transform = Cgaffinetransform.init (scalex:1, Y:3) Self.view.addSubview (self.progressview) self.progr

(key,value) tuples, and they can be decomposed using temporary constants or variables. For (Airportcode, Airportname) in airports {println ("\ (Airportcode): \ (airportname)")We can also retrieve the key or value for a dictionary by accessing its keys or the Values property (both of which are ergodic collections) for Airportcode in Airports.keys {println ("Airport code: \ (Airportcode)")}For Airportname in Airports.values {println ("Airport name: \ (airportname)")If you just need to use a dicti

(Widthlabel)There is also an easier way to add a value to a string: write the value in parentheses, and then write a backslash (\) in front of the parentheses , and give a chestnut:35"I have \ (apples) apples. " "I have \ (apples + oranges) pieces of fruit. "Use square brackets ( []) to create arrays or dictionaries, and use square brackets to access their elements by ordinal or key varShoppinglist = ["Catfish","Water","Tulips","Blue paint"]shoppinglist[1] ="bottle of water" varOccupations

// Playground - noun: a place where people can play Import UIKit //import Foundation Var str = "Hello, playground" //swift new operator Nil Coalescing Operator (nil aggregate operator) binary operator It is designed for optional data, usually used in the process of unpacking // Example: a??b ---> a!=nil? a! : b (a is unpacked, otherwise it returns the default value b) a must be optional, b must be unpacked with a Type is consistent // instance: Var

= = charactertofind{ return true }}return false }let containsavee = containscharacter(string: "Qwertyuiop", Charactertofind: "y" )println(containsavee) // to default parameters func joinss (outsting s1:string, tosting s2:string, Withjoiner joiner:string = ","),String{ return s1 + joiner + s2 }//The third parameter is not written directly using default values let str1 = joinss(outsting: "Nihao", tosting: "Heri") println(str1) // attention will go wrong func joinbb (outstin

Again a big dream, also can not resist you like to insist!I ran and ran, just to catch up with the expectations of their own.Third, operator + expressionSwift allows overloading of operators, such as "+" you can overload itFollow-up details will be introducedassignment operator Passarithmetic operators Most pass, only say special19/4 result is 4 instead of 5//truncated roundingComplete complex math operatio

Create a single view appIn the View window stall a navigation controller, the default navigation controller is automatically associated with the table view, if not required, you can delete the automatically added table view, create a new view Controller can be associated with navigation controller. (Right-drag from Nav to view, select Rootview)650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M02/6D/A5/wKiom1VoIRrTVOsaAABIDe5-hKE437.jpg "style=" float: none; "title=" Nav.png "alt=" Wkiom1vo

, press the right button and drag a line to the masterviewcontroller.swift file:This will pop up a window that allows you to create a iboutlet. Enter Bugstableviewin name, Storage set to Weak, then click Connect.Repeat the steps above to create two Iboutlet for text field and image view:Bugtitleview,bugimageview.For custom view, create a iboutlet: bugrating.Finally, the following additions will be added to the masterviewcontroller.swift file: @IBOutlet weak var bugstableview: nst

Status Settings7, Scene background settings8. Game Platform Setting principle9. Create a game platform10. Create a game platform factory11, the Mobile platform12, the platform has been continuously generated13. Randomly generated platform location14. Remove the platform that is already outside the scene15. Background scrolling principle16. Background scrolling Implementation17. Create Collision Detection Identification class18, scene set physical collision19, Panda set physical collision20, Pan

1.swift @discardableResult Statement:Swift Normal method If there is a return value, the call must have a receiver, otherwise the compiler will report a warning,If you add @discardableResult to the method before you do not handle it, there will be no warning. You can also use a wildcard to receive the method return value, you can achieve the same purpose.2. Controller initialization:Init (urlstr:string?) { Super.init (Nibname:nil, Bundle:nil)

progress, we have to do something.timepassed This variable from its name can be seen to indicate how long the past a variable, how long, and when as a reference? Compare Lasttick and now, because Lasttick records the last recorded point in time, which is definitely backwards, sotimeintervalsincenow the function can return and the current time difference. Because it is the past time point, all this value must be negative, and the unit is milliseconds, so we need *-1000 to turn it into a positive

" Case . Hearts:return "Hearts" Case . Diamonds:return "Diamonds" Case . Clubs:return "Clubs"}}}let Hearts=Suit.heartslet heartsdescription= Hearts.simpledescription ()In addition to associating a method, an enumeration also supports associating values on its members, and different members of the same enumeration can have different associated values:enumServerresponse { CaseResult (String, String) CaseError (String)}let success= Serverresponse.result ("10:00am-6:00pm","8:

forIteminchshoppinglist {println (item)} for(Index, item)inchEnumerate (shoppinglist) {println ("Item \ (index + 1): \ (item)")}//Create and initialize an arrayvar someints =[Int] () println ("someints is of type [int.] with \ (someints.count) Items")//assigning default values when creating arraysvar thressdoubles = [Double] (count:5, Repeatedvalue:0.0)//Combining Arraysvar anotherdoubles = [Double] (count:3, Repeatedvalue:0.1) var eightdouble= Thressdoubles +Anotherdoubles//Dictionary//Diction