Swift

Original articles, welcome reprint. Reprint Please specify: Dongsheng's blog Constructors can also be overloaded as a special method.In swift, constructors can be multiple, and their argument lists and return values can be different, and these

// lazy Loading this input box private lazy var Textview:uitextview = { = uitextview () = Uifont.systemfontofsize ( - ) = uicolor.darkgraycolor ()// working with the keyboard, setting the keyboard's vanishing mode

The Memory management foundation of Swift language *************Memory management: For the management of the memory footprint of the instance (placed inside the heap)Example: 1, instance constructed from class type 2. Closure Object/*Memory

Original articles, welcome reprint. Reprint Please specify: Dongsheng's Blog static methods are similar to static properties,Swifta static method , also known as a type method , is defined in. Static methods are defined in the same way as static

Understand what the teacher says!var myset:set = [1,2,3,3];//set collection is unordered collectionvar arr = [1,2,3];//array ordered collectionvar dic = [1: "A", 2: "B"];//dictionaries are unordered collectionsFor item in arr {//1. To get the length

Articles for their own study, the department is reproduced. Notes for learning 51cto courses. If there is infringement, please private messages I delete.The links are as follows.? http://edu.51cto.com/roadmap/view/id-58.html1. Syntax format for if

1Let array = ["Shenyang","Beijing", "Shanghai", "Guangzhou "]2 3 vari =04 forIinch 0.. Array.count5 {6Print"\ (i): {"+ Array[i] +"}")//Easy Output Array index7 }8 9 println ()Ten forValueinchArray One { APrint""+ Value +">")//not easy to output

First middleware The core code, this code unloads the swift source code directory, ~/swift/swift/common/middleware under the new deletionpreventing.py:ImportOS fromSwift.common.swobImportRequest, ResponseclassDeletionpreventingmiddleware

Import UIKitClass Viewcontroller:uiviewcontroller {@IBOutlet weak var toolbar:uitoolbar!@IBOutlet weak var addactionlabel:uilabel!Override Func Viewdidload () {Super.viewdidload ()Configuretoolbar ();}Configure the tool bar Item function Func

Save user information (saved in sandbox)-(void) Saveuserinfo {Nsuserdefaults *defaults = [Nsuserdefaults Standarduserdefaults];//IOS 8.0 will be written directly to the sandbox, no need to use ' [defaults synchronize]; ' [Defaults setobject:1.

---Array, mainly used to save data, in Swift, the creation of arrays is more powerful than OC, but at the time of initialization, found a few problems, perhaps because of self-study reasons, through the search, reluctantly persuade themselves

original articles, welcome reprint. Reprint Please specify: Dongsheng's blog Passing references to parameters A class is a reference type, and other data types such as Integer, float, Boolean, character, string, tuple, collection, enumeration,

1.Objectice-c Code:1Nsshadow *shadow = [NsshadowNew];2 3[Shadow Setshadowcolor:[uicolor colorwithred:1.0Green1.0Blue1.0Alpha1.0]];4 5[Shadow Setshadowoffset:cgsizemake (0,1)];6 7Nsdictionary *attributes = @{8 9Nsforegroundcolorattributename:

Summary: Swift has a super-rigorous initialization method that not only reinforces the position of the designated initialization method, all the unmodified init methods need to ensure that non-optional instance variables are initialized in the

Through the Corelocation class, the location information obtained is the geographical information expressed in longitude and latitude, and can be deserialized into an address by the Clgeocoder class. Conversely, latitude and longitude can also be

In addition to acquiring the location data of the device, the corelocation can also obtain the orientation of the device (which can be used to implement the compass function, etc.).The 1,clheading object provides heading-related data through a set

Original articles, welcome reprint. Reprint Please specify: Dongsheng's Blog Branch statements are also called conditional statements, and the SWIFT programming language provides three branch statements of if, switch, and guard.if StatementThe

One, Core data introduction1,core data is a persistent storage framework that appears after iOS5, providing an object-relational mapping (ORM) capability to transform objects into data and to restore data saved in a database to objects.2, although

Some of the properties commonly used by 1,uiview are as follows:frame: Coordinates and size relative to Parent view (X,Y,W,H)bounds: Relative to its own coordinates and size, so bounds x and Y are always 0 (0,0,w,h)Center: Midpoint coordinates

A method is a function that is associated with some particular type. Classes, structs, enumerations can define instance methods, and instance methods encapsulate specific tasks and functions for instances of a given type. Classes, structs,