Swift

Quartz 2D IntroductionQuartz 2D is a two-dimensional graphics-drawing engine developed by Apple, which supports both iOS and Mac systems. It is a C-based API framework that provides low level, lightweight, high-fidelity 2D rendering. The work it

The previous articles explain how to use automatic layout library Snapkit. This article uses a complete sample (login page) to demonstrate how to automate the layout using Snapkit in the actual project. 1, the effect chart is as follows 2, Code

Swift 2.0 image upload and image client compression is to write a certain app, pull away, in fact, relatively simple, and did not do a lot of iOS internal mechanism to judge, just to achieve the image upload and image compression upload after the

The default navigation bar Uinavigationcontroller's caption is text, and the Navigationitem.titleview property makes it easy to replace it with a custom UIView view. 1, using the picture as the title

Although you write any programming language, you need to use different variables to store all kinds of information. Variables are simply reserved memory locations to store values. This means that when you create a variable, some space is preserved

A class can inherit a method, a property, or some other attribute from another class. When a class inherits from another class, the inherited class is called a subclass, and the inherited class is called the parent class. Inheritance is a

Classes, structs, and enum types can be called to call a group or a member element in a sequence by defining the subscript. The subscript index makes it easy to retrieve and set the values, without requiring additional action. For example, you can

Swift is a new programming language for iOS and OS X applications, based on C and objective-c, without some of the compatibility constraints of C. Swift uses a secure programming model and adds modern functionality to make programming simpler, more

Swift and objective-c Mixed considerations: Objective Swift, which has been in operation for several years, has significantly reduced the entry threshold for iOS compared with the objective-c of Swift's language mechanism and ease of use. Of

First, the application API Key First we have to go to the Baidu Map open platform to apply for an API Key, for our program use. Address: http://lbsyun.baidu.com/ Second, the project configuration 1, modify Info.plistBecause the iOS9 is switched

META Group A tuple (tuples) combines multiple values into a single compound value. The values within a tuple can be of any type, and each element does not need to be of the same type (independent of the types of elements, without interfering

Enumerations Enumeration Use an enum to create an enumeration. As with classes (class) and other types of naming methods, enumerations can also have method (methods). Enum Rank:int {case aces = 1 case Two, Three, Four, Five, Six,

A class can inherit another class's methods, properties, and other characteristics, when a class inherits from another class, the inheriting class is called a subclass, the inherited class is called the parent class, or (superclass), in Swift,

This article transferred from: http://onevcat.com/2014/06/my-opinion-about-swift/Thanks to the original authorAlthough 4:30 to get up and wait for admission, the result is just sitting in the back of the position to watch the big screen to

Directory: Basic syntax Trailing closures Value capture Closures are self-contained function code blocks, and closures take one of the following three forms:? A global function is a closed packet that has a name but does

Directory: Arrays: Array Set: Set Dictionary: Dictionary Swift provides three basic collection types for array (ordered collection data), set (unordered No Duplicates collection), and dictionary (unordered key-value

Swift Basic SyntaxBasic1. Pre-processing commands are canceled2. Cancellation of the concept of pointers3. The NS prefix is canceled4. Replacing a class with a struct5. ";" In the same row used to split the statement, if not the same row can be

What is an optional type?First of all, there is a problem with a string type variable in Swift that has a method called ToInt that converts a string variable to an int type variable.var stringValue = "5"var intValue =

constructor function Non-Optional property, you must set the initial value in the constructor to ensure that the properties are initialized correctly when the object is instantiated Purpose of the constructor: Assign space to your

LockNo concurrency, no encoding. As long as we talk about multithreading or concurrent code, it may be difficult for us to bypass the discussion of locks. Simply put, in order to securely access the same resource in different threads, we need these