Swift

In the previous article I introduced how to use the Snapkit Snp_makeconstraints method to set various constraints. But sometimes our pages are not always fixed, which requires modifying existing constraints. This article describes how to update,

Items often use Uinavigationcontroller to navigate the individual pages, the return button on the left-hand side of the navigation bar, the default title text is the parent page title. However, if the title (title) text of the subpage is

In development, we often need to dynamically change the button label text, using the Settitle () function on it. Sometimes we need to switch between several headings, as shown in the example below, and the button text will switch between "play" and "

The month small liter once used the interface to carry on the adaptation, as does not have the systematic Xcode training person, is too troublesome. Or the code comes directly. You can set the size of a component by directly calculating the width

Swift Loading BrowserPull a control on the page @IBOutlet weak var web:uiwebview!Override Func Viewdidload () {Super.viewdidload ()Do no additional setup after loading the view, typically from a nib.var url = nsurl (string:http://www.111cn.net);var

Items often use Uinavigationcontroller to navigate the individual pages, the return button on the left-hand side of the navigation bar, the default title text is the parent page title. But if the title of the superior page is very long, the

This time suddenly think of a very long ago to use the knowledge-waterfall flow, originally want to use a simple method, found himself went astray, finally can only malicious to rewrite uicollectionviewflowlayout. Below I will implement the

The ability to take greater than form is defined as inheritance. A general class can inherit properties and methods from another class. Classes can be further divided into subclasses and superclass. Subclasses: When a class inherits properties from

Classin Swift, classes are building flexible building blocks. Similar to constants, variables, and functions, the properties and methods of the class that the user can define. Swift provides us with a declaration class without the user creating

Swift's character is a single string literal and is a character data type. The following is a simple example of using two characters of constants quantity: Copy Code code as follows: Import Cocoa Let Char1:character = "A"Let

In this iOS application development tutorial, we intend to implement gesture recognition. As you know, iOS supports a large number of gesture operations that provide good application control and an excellent user experience.let's get started! You

If you've never had access to permission control before, listen to a little story: Xiaoming is a freshman of five crossing Industrial College, recently he is a little annoyed, because the roommate often use his hot water pot, as if it is his own

Destructors are invoked before an instance of a class is disposed. A destructor is defined with the keyword Deinit, similar to that of the initialization function, which is defined with INIT. Destructors apply only to class types. 1. Principles of

1.UITapGestureRecognizer Tap/Double-click gesture Copy Code code as follows: var tapgesture = UITapGestureRecognizer (target:self, Action: "Handletapgesture:") Set the number of gestures to click: Click 2

When we use a text box (Uitextview), we may want to insert some pictures in it, in addition to entering text. Or some of the text mixed with the content needs to be displayed. This only needs to be achieved by TextView of the attributed text. J

In development, we sometimes need to deal with the original uiimage, such as resizing or scaling operations. 1, extended UIImage In this case, the UIImage is expanded to add two methods, which are used to resize and resize the scale

Swift comes out more popular, but there are many third-party libraries that do not support swift, and individuals feel that Swift still has a long way to go.And recently, even Swift's founders have left Apple ....Join Swift for third-party things

ADD This code to your project and comparing dates is easier than everExtended NSDateextension nsdate{func isgreaterthandate (datetocompare:nsdate)-Bool {varIsgreater =false ifSelf.compare (datetocompare) = =nscomparisonresult.ordereddescending

Any language, as long as there is no need to forget, you have to knock on a small project, practice practiced hand;Let SCROLLVIEWBG = Uiscrollview.init (frame:slscreenrect)Let images = ["First", "second", "third"]Let Pagecontrol = Uipagecontrol.init

 State maintenance is a topic that is not enough, after all, the status of processing is the core of our entire app, but also the most prone to bugs. Before writing a functional programming point of view of State maintenance of the article, this