Swift

Migration provides an opportunity to re-examine existing objective-c applications, as well as the Swift code to better optimize the architecture, logic, and performance of your application. Directly, you will use the previously learned mix and match

iOS to determine whether the content in the TextView is empty in the development of iOS, it is often necessary to determine whether the data in the TextView box is empty or whether it is a space, following the syntax of Swift as an example to

Enumeration: In fact, everyone is familiar with, a variety of languages have, may be the use of different frequencies. Brief introduction: Enumerations define a common data type for a series of associated values, while allowing you to use these

An operator (operator) is a special symbol or phrase used to examine, change, or combine values. For example, the plus operator has two numbers added (such as let i = 1 + 2), and some more complex operators, such as logic and Operators (&&) (e.g. if

Swift is a new programming language for the development of IOS and OS X applications, however, its development experience has much in common with C or objective-c. Swift provides all the underlying types in C and objective-c, including int

About Swift Swift is a new programming language for iOS and OS X applications, absorbing the essence of the C and Objective-c languages, but without losing the compatibility with the C language. Swift uses a secure programming model and

Swift, the global Security financial Information service provider, has formally chosen to use the Super Ledger fabric database in its most prominent blockchain project. The project was designed to streamline bank reconciliations to facilitate

Playground-noun:a place where people can play import UIKit//----------------------------------------------------- -------------------------//1. Defines a fixed-format dictionary//Dict1 for all "key-value" types consistent (all strings) var dict1 = ["

9.9 removing platforms outside the sceneUse as a platform is a steady stream of production, if you do not pay attention to destruction, the platform will accumulate more, although in the game scene can not see. Dozens of can not see the problem, the

Swift's REPL (read-eval-print Loop) environment allows us to use Swift for simple, interactive programming. This means that every input sentence is executed and output immediately. This is common in many interpretive languages and is well suited for

Control pass-through statements (controlled Transfer statements)The control transfer statement changes the order in which you run the code, through which you can implement the code jump. Swift has four kinds of control transfer

First step: Create and configure Bridging-header.hSwift and OC are mixed, first there must be a. h file, where you use Bridging-header.h and then set the project's build Settings--swift compiler--objective-c bridging The Header content is

A dictionary represents a very complex collection that allows the element to be accessed by a key. A dictionary is a set of two parts, one is a set of key (key), andThe other is a collection of values (value). A key collection cannot have duplicate

Strings and charactersA string is an ordered collection of Character (character) types of values, through a collection of string typesSwift's string and Character types provide a fast and Unicode-compatible way for your code to use, creating and

When you use try for error handling, you often see a question mark (?) or exclamation point (!) behind the try, what's the difference between them? 1. Use try?Try? The error is converted to an optional value, and when the try?+ function or method

Swift provides two types of collections to hold multiple values-arrays (array) and dictionaries (Dictionary). Arrays store values of the same type in an ordered list. Dictionaries store values of the same type in an unordered collection, which can

The contents of this page include: Enumeration syntax (enumeration Syntax) Match enumeration values with Swith statements (Matching enumeration values with a Switch Statement) Correlation value (associated values) Original value

I have recently started to learn swift and have encountered a very strange problem. A syntax error occurred while writing the For loop. The code is as follows:fori0i10i++{ println("hello world") }This is arguably the simplest use of the For loop

ObjectiveIn an HTTP request, we often refer to the URL of the GET request Param,post http Body,response Json, which is a standard rest API element that comes standard. In some security-validated APIs, cookies are often involved. When the user logs

Swift Project compatibility Objective-c issues SummaryReprinted from Http://www.cocoachina.com/swift/20150608/12025.htmlThis article is a contribution article, one leaf (blog)Welcome to the original article or translation to us, the way of