Swift

Protocols provide a blueprint for methods, attributes, and other required functionality. It simply describes the skeleton of the method or property, not the implementation. Method and property implementations can also be accomplished by defining

Description and configuration of swifthttp1, what is swifthttpThe Swifthttp essence is based on ' nsurlsession ' and has been encapsulated. Using Swifthttp can make our network request related code (such as getting data, submitting data, uploading

1, what is the Friendship Union (umeng.com) (1) The Union is committed to providing mobile developers with professional data analysis, development and operation components and extension services. Services include mobile application statistical

When the system is to display a view (UIView), it sends DrawRect (RECT:) messages to the view. So, if we need to draw on a view, we can implement it inside the DrawRect method. 1, filled rectangle with solid color The following

The difference between automatic recording and general recording is that you don't need to press the recording in the micro-letter and then let it go, but automatically judge the recording and the point of the stop based on the size of the voice,

As part of OBJECTIVE-C Interoperability (interoperability), Swift provides a fast and efficient way to handle cocoa data types. Swift will automatically convert some objective-c types to Swift types and convert Swift types to objective-c types.

Algorithm ideaHeap sorting utilizes the feature of the maximum (or minimum) keyword for the maximum heap (or small Gan) heap top record, making it easy to select the record of the largest (or smallest) keyword in the current unordered area. 1. The

One, array of arrays changes Examples of the modified APIs in array arrays are as follows: Create an array of a large number of the same elements//create arrays of 10 string elements, and each element is a string "Hello"//swift2.2//var array3 =

Definition of a stringvar string = "Hello,swift";Let string1 = "hello,swift";Let string3 = "";Let String4 = string;print (string);Print (string.uppercased ());//UppercasePrint (string.lowercased ());//lowercaseString byteLet Leng =

First, the OC calls the swift file two, the SWIFT calls the OC file three, the attention and the summary adds: Four, the custom bridge file one, OC calls Swift fileWhen you create a swift file in the OC project, Xcode prompts you to create a

1. Swift realizes split line completionSwift is a big step forward, as long as you set tableview.separatorinset = Uiedgeinsets.zero to complete the split line,2, OC realization of Split-line completionIn OC, we have to implement the

//Viewcontroller.swiftSwift+arrayImport UIKitClass Viewcontroller:uiviewcontroller {Override Func Viewdidload () {Super.viewdidload ()Self.view.backgroundColor = Uicolor.yellow;Array initializationvar numbers = [1,2,3,4,5,6];Print (Numbers)var

Tag:inter   failed    function nesting    get   pop    one    address    div   and    //function//demo1 no parameter type func testconcat () {println ("test function");} Testconcat ()//Call Demo1//demo2 Multi-parameter, a return value/* function

Eventkit provides a series of classes for getting and manipulating user calendar events and reminders. In the following tutorial, My goal is to lead you out of using Eventkit to build an application. My goal is to lead you to the first step in

First, the definition of the array: storing values of the same type in an orderly manner(1) shorthand (shorthand) syntax for arraysYou can pass Array, here, element, the type of the value of the array storage element. Can also be written in brackets

Yi Yi Graffiti (Swift)This is a graffiti software, to achieve the basic operation of the picture, for your reference, the main function points are:1. Intercepting Long graphsThe main principle of this function is to intercept the area where the

Collection typeSwift provides Arrays, sets and dictionaries three basic collection types used to store data, arrays (Arrays) are sets of ordered data, collections (sets) are unordered sets of no duplicates, and dictionaries (dictionaries) are

Control flowSwift provides a variety of control flow structures, including a while loop that can be executed multiple times, select if, Guard, and switch statements that perform different branches based on specific criteria, and break and continue

Lazy loading, computed properties, reflection mechanism1. Lazy Loading:Purpose: 1. Delay creation, load when needed, save memory space2. Avoid the development of the problem of understanding the package (important!!!) ）Knowledge: 1. All UIView and

The singleton pattern in this paper is divided into strict single case mode and not strict single case mode. The singleton pattern requires that a class have an instance that has a public interface that can access the instance. Strict singleton mode