IOS

Build mainstream App frameworks in 10 minutes and build mainstream appsBuild mainstream framework Interface 0. achieve resultsSnip20150904_5.png When we were playing the iPhone application, we didn't find that most of the applications had

Child class override parent class Property (OC), override class propertyocRecently, when I was working on a project, I found a problem about @ property, that is, the problem that the subclass overrides the property of the parent class. The blogger

IOS-simple filter effect implemented using GPUImage GPUImage is an open-source iOS framework based on GPU image and video processing. Because GPU is used to process images and videos, the speed is very fast. in addition to the speed advantages,

Arc4random_uniform random number, arc4random_uniform In Objective-C, there is an arc4random () function used to generate random numbers without seeds. However, this function generates a large range of random numbers and requires a modulo algorithm

What is the difference between initWithFrame and initWithCoder ?, Initwithcoder When the program we writeUse code to create control View content, You need to call initWithFrame to initialize   -(Id) initWithFrame :( CGRect) frame {if (self =

IOSAutoLayoutDemystify, iosdemystify Book Descripter Auto Layout transforms the way you create iOS user interfaces. As flexible as it is powerful, Auto Layout gives you unprecedented control over your iOS user interfaces. But Auto Layout has a

Simple calendar and simple calendar 1. initialize some global variables 1 _gregorian = [[NSCalendar alloc]initWithCalendarIdentifier:NSCalendarIdentifierGregorian];2 _calendarDate = [NSDate date];3 _dayInfoUnits =

IOS loop reference I asked about circular references during the interview today, so I looked at it. It turns out that Block is easy to cause circular references. Today, we will briefly introduce some circular references. What is circular

IOS ui13_data parsing XML _, JSON -(IBAction) parserButton :( id) sender { ParserXML * parser = [parserXML alloc] init]; [Parser startParser]; // Traverse the Student name For (Student * stu in parser. stuArr ){ NSLog (@ % @, stu. name

IOS project development practice-use user preference data for startup prompts This case also stores user input based on the user preference data API provided by Apple. For the basic usage of preferences, you can view another blog titled iOS project

Annotation bubbles on iOS Map First:First, you can customize a View for drawing. You can draw all the images you want. VcD4NCjxwPsnPtPrC66O6PC9wPg0KPHByZSBjbGFzcz0 = "brush: java;"> This method gets the context. -(Void) drawRect :( CGRect)

IOS project development practice-learn to use the TableView list control (4) plist reading and Section display The text will store the data in the plist file and then read it in the program. The Section is displayed in the TableView control

Isnan function of iOS If a number is a definite number, it is not a nan value. If a number is infinite and infinitely small, it is the nan value. I tried to print whether the following values are nan values.   If (isnan (1 )){ DLog (@ 1 is NAN

IOS forces switching between screen and Landscape Recently, an html5 electronic Protocol is required, which involves signatures. The Portrait screen signature is not enough. Therefore, you need to switch the screen to the landscape screen. After the

How iOS updates apps App update process Obtain the current version number currentVersion. Compare currentVersion with the latest version number latestVersion. If the current currentVersion number is small, update the current version number.   Obtain

IOS tips-use runtime to solve UIButton repeated clicksIOS tips-use runtime to solve the UIButton repeated click problem. What is this problem? Our button is a response once, even if you click frequently, there will be no problems, but in some

IOS delays program execution and iOS Program Execution // Gets stuck in the main thread [NSThread sleepForTimeInterval: Time (seconds)]; // After a delayed task is customized, it will not be stuck in the main thread and will be executed in the

IOS: DrawRect & CoreText, iosdrawrect -(Void) drawRect :( CGRect) rect {// Drawing code // Quartz 2D painting environment, a canvas CGContextRef context = UIGraphicsGetCurrentContext (); // border circle background circle CGContextSetRGBStrokeColor (

Ios ui basics 06 and iosui06 Autoresizing 1. Functions of the four lines around Autoresizing: As long as you select the previous one, the distance between the current control and the parent control is fixed. What is the current

IOS Network -- NSURLCache sets the network request cache and iosnsurlcache Today, I checked the HTTP protocol and saw the cache-control in the response Header. So I went into some in-depth research. I found a class I ignored in iOS-NSURLCache class.