IOS

Role: Converts a string to decimal by using the function strtoul (const char *, char * *, int) in the corresponding binary format char* p;//Position string conversion termination unsigned long s = Strtoul ("FFt6", &p,); NSLog (@ "%lu",

It is almost every developer's problem to judge that NSString string is empty, and for most people the first thing to flash through the brain is the following method if ([Yourtextstring isequaltostring:@ ""]) Unfortunately, such judgments often

Original article Address Problem Description: Enter a page-->b page-->ios return--> screen appear--> manual Click Screen--> Problem Resolution Reason Analysis: When using WebView to develop Vue projects on iOS machines, Go history (-1) cannot pull

If your project is the use of code layout, in the code in the face of the layout of the control to make some adjustments, you can not see the effect of changes in real time, each change requires a rerun of the project. By using the Dyci tool, it can

This article and the next series of articles will introduce the use of multimedia, or multimedia, in iOS development. Multimedia multimedia includes three parts of audio audio, video and image images. In iOS there is a special layer, media layer,

In doing. NET to the iOS device app for a message push, using the Pushsharp Open source class library for message push, and in the development process, using a beta version of the app, The P12 certificate used is the

IOS limits the input length of TextField and iostextfield There are many ways to limit the length of textField input on the Internet, but I don't think it is perfect. To be precise, it can be said that it is not in line with the actual development

IOS-WKWebview ViewController with progress bar loading [KVO listens to the Webview loading progress ],  Preface Why do we need to say that WKWebview has already mentioned that WKWebview has completely replaced Webview after ios8. the reason is that

PageController interface development tutorial in iOS programming development, iospagecontroller In iOS Programming Development, The pageController interface development tutorial is as follows: Project call sequence: 1. initialize the title

OSG composition structure details, OSG composition structure detailsCore Structure of the Composition Structure of OSG The OSG function class is named in the form of "namespace + class name. The namespace naming method is as follows: The first word

Objective-C Loops, objective-cloops There may be a situation, when you need to execute a block of code several number of times. in general, statements are executed sequentially: The first statement in a function is executed first, followed by the

IOS Learning -- get the current top-level ViewController and iosviewcontroller During iOS development, we often need to obtain the ViewController of the current page, and then use ViewController to perform some operations, such as displaying a

IOS development: page Jump and pop-up mode of ViewController, iosviewcontrollerViewController page Jump When you jump from a Controller to another Controller, there are generally two types: 1. Use UINavigationController to call pushViewController

IOS development: fixed the problem of loading gif without display after SDWebImage4.0. iossdwebimage4.0 Previous usage UIImageView *imgView = [UIImageView new]; imgView.contentMode = UIViewContentModeScaleAspectFit; imgView.frame =

IOS-CoreText and ios-coretext1. Determine whether the clicked position is within the range of a specified nsange. # Pragma mark determines whether the clicked position is within the range/** converts the clicked position to the offset of the string.

IOS calls the System camera and album, and ios calls the cameraAfter iOS 10, remember to add the permission to get photos and albums in plist. After iOS 10, remember to add the permission to get photos and albums in plist, after iOS 10, remember to

ReactiveCocoa (on), ReactiveCocoa (ReactiveCocoa common classes 1. Core class in RACRACSiganl： RACSiganl: Signal class. It generally indicates that there will be data transfer in the future. If there is any data change, the signal will receive the

IOS understands this article, and your block no longer needs WeakSelf weak reference !, IosweakselfPreface: Recently, the Sagit frame memory is being released. For beginners, all the articles you have learned are intended to use typeof (self) _ weak

About Sagit. Framework solution: IOS Memory leakage (lower) caused by two-way reference-self, sagit. frameworkiosPreface: After processing the Framework Memory leakage, refer to the previous article: About Sagit. Framework solution: IOS Memory

IOS XIB and Other proportional adaptation, iosxib adaptation Select two views to make them equal to width and height, and then set the multiplier factor in the constraints.   A simple example: Requirement: Set the width of the white view to half