Swift

How to limit the number of words in OCI implemented it with a notification, first adding the uitextfiled and Uitextview reception Center [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textViewNotifitionAction:)

Initialize Project Deployment version of the project Which systems the project will run in later Support for the screen iphone apps generally only support horizontal screen iphone games generally support vertical

1. First go to https://github.com/danielgindi/Charts download frame down and unzip2. After decompression, two demo folders are deleted (can be deleted without deleting), and then the entire folder is copied to the project root directory3. Open the

Closure Closure Package Introduction Closures are very similar to block in OC Block in OC is an anonymous function Closures in Swift are a special function Block and closures are often used for callbacks

Import UIKit/*Summary: 1:let file = (#file as NSString). Lastpathcomponent, #file获取的是打印所在的文件的全路径, Turn to NSString to call Lastpathcomponent gets the end of the path. The following element, as NSString to nsstring type 2:let funcName =

With the release of Xcode 8, Swift 3.0 is finally here. A large number of API names have changed. But it feels like the change after 3.0 should be smaller, so try to learn it again. 1. About the computed properties concept introduced by

Introduction to Strings Strings are used very frequently in any development. Differences between the strings in OC and Swift When the string type is nsstring in OC, the string type in Swift The string @ "" In OC, the

Swift sets the navigation bar to be transparent, that is, to set an empty picture, but if you only set this code, does not work, but also need other settings, directly on the code 1. Set navigation bar Title properties: Set title Color

When to handle exceptions in Swift, when a method of the system is called, the method finally has a throws that the method throws an exception, and if a method throws an exception, the exception needs to be handledSwift exception handling provides

1, Constraint priorityWhen we use Snapkit, we can also define the precedence of the constraints. In this way, when the constraint conflicts, the precedence constraint overrides the low-priority constraint. The specific priority can be placed at the

The requirements are: WebView font display size is appropriate, there will be large pictures, large tables, can not be scaled to the left and right sliding view.First, if you want to meet the above requirements, you need to put WebView into the

1. Find Assets.xcassets2. Create New Launchimage in Assets.xcassets and drag into the corresponding picture3. Select your project, click General under App Icons and Launch Images Select the option you wantAPP Icons Source is the icon for your

In the previous article I described how to use Snapkit's 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, remove,

Exception handling in SwiftIf a method is called on the system, the method finally has a throws. Indicates that the method throws an exception. If a method throws an exception, the exception needs to be handled* Three ways of handling anomalies in

After a period of depression, I found that the feelings are hypocritical, only the code is real (yuck)Because I still can't use Swift after reading the swift syntax, and then I go to the official document with a lot of death, that's the help that

/********************** Array definition **************************/array : Array represents data// Let decorated identifiers are immutable groups ( cannot be modified after element is determined )The //var modifier identifier is a mutable array (

/************************** dictionary definition *****************************/type of dictionary in Swift Dictionary// immutable dictionaries using let adornments// variable dictionary with var modifier// Note : dictionary is used when creating []

Import UIKitclass Person: NSObject {var name: String? { // can give newvalue a custom name willset (new) { //The property is about to change and the method that is called when it is not changed // In this method there is a default system attribute

First, Swift basic operation Import FrameOC is #import Swift is import UIKit Swift definition Identifiers: Constants or variables must be specified VAR (variable)/let (constant) identifier name: type of identifier =

Haven't written a blog for a long time, today specially wrote this, is also one side to imitate others to write the demo, the annotation part is Needed. Please refer to the students who need it.@IBAction func headimagebtnpage () {//upload AvatarLet