Swift

Sometimes we need to display a thumbnail image of the video in the interface so that the user can probably get a sense of the content without having to click. Here's how to get a local video, as well as a video screenshot of a network online video.

Vi. use Alamofire for file upload 1,alamofire supports the following types of uploads: FileDataStreamMultipartformdata 2, upload files using the file stream Let FileURL = Nsbundle.mainbundle (). Urlforresource ("Hangge", Withextension:

Break statementThe break statement in the C programming language has the following two uses: When a break statement is encountered in a loop, the loop terminates immediately, and program control continues after the Loop statement (Exit Loop). It

The optional type is a new and powerful feature in Swift. In this article, Bovenri discusses how to ensure strong type security through optional types in swift. As an example, let's create a swift version of the Objective-c API, but in fact Swift

First, the introduction The Protocol deals with properties and methods that act like abstract classes in Java, and the types in swift implement agreed properties and methods by complying with the protocol. The protocols in Swift are declared using

1, Effect chart There are two text labels in the cell, showing a description of the title and the contents respectively. At the same time, two labels are self growing. 2,storyboard settings(1) Set the cell identifier to

When I first saw the swift extension, I thought about the extensions and categories of OC, so I was looking for Swift's expansion and OC extensions and categories. After several searches, the expansion of swift and the category of OC were found to

In sub-controller A of Navtionviewcontroller, a B control is used as its property, a block of the B control is defined, and the properties of the a controller are referenced in this block, and the block captures a at this time, forming an indirect

Http://www.raywenderlich.com/76024/swift-table-view-animations-tutorial-drop-cardsStandard table view is a powerful and flexible way to render data, and in most cases your app uses some form of table view. However, one drawback is that you can't

viewcontroller.swift//jieuitapgesturerecognizer////Created by Jiezhang on 14-10-4.//Copyright (c) 2014 Jiezha Ng. All rights Reserved.//import Uikitclass Viewcontroller:uiviewcontroller, uiactionsheetdelegate {@IBOutlet var im: uiimageview! var

Array is the data type of the arrays in Swift. The Nsarray is the array data type in OC. There is a connection between the two. Some of the things in OC can sometimes be used in swift. Today we're going to use Nsarray and array in Swift, and convert.

Background and overviewSwift was originally a highly available distributed object Storage service developed by Rackspace, and in 2010 contributed to the OpenStack open source community as one of its initial core sub-projects, providing virtual

Recently prepared to convert the project into OC and Swift Hybrid development, try to write a swift music player demo, realize the advantages of swift relative OC, Nonsense said, first on:PS: As Jay Iron powder, the theme of the demo must be related

Swift-easinganimation drawing a doughnut animationEffectSourceHttps://github.com/YouXianMing/Swift-Animations////Circleview.swift//swift-animations////Created by youxianming on 16/8/16.//copyright©2016 year youxianming. All rights reserved.//Import

An optional chained call (Optional Chaining) is a way to request and invoke properties, methods, and subscripts on an optional value that the current value may be nil. If the optional value has a value, the call succeeds, and if the optional value

Swift provides a C-like process control structure that includes a for and while loops that can perform tasks multiple times, select if and switch statements that execute different branches of code based on specific criteria, as well as break and

swift-xcode7.xswift-xcode7.x (7.1,7.2,7.3) New playground run cannot runUnable to find execution service for selected run DestinatioWorkaround 1. Close the Xcode2. Execute two lines of code at the terminalRM -RF

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

In development, it is often necessary to use the Protocol proxy mode. For example, after entering the edit page to modify the data, the new data is uploaded back to the main interface.here is a sample to illustrate the Protocol proxy mode, with the

A protocol defines a set of standards for methods and attributes without specific implementation. The Protocol can be implemented (or followed) by classes and struct ).   protocol SomeProtocol { // protocoldefinition goes here } struct