IOS

IOS-Use of AVAudioSession-playing music in the background, ios-avaudiosession1. Preface • AVAudioSession is a singleton that can be directly used without instantiation. AVAudioSession plays an important role in various audio environments. •

2. iOS development UI-program startup principle and UIApplication, 2. iosuiapplication UIApplication delegate I,UIApplication1. Brief Introduction (1) A UIApplication object represents an application. A UIApplication object represents an

IOS Study Notes 2015-03-20 OC-array, 2015-03-20oc- [NSArray] the element of an array in Definition 1 immutable array 2 oc can be an element of any object 3. The address of the element contained in the number 2. initialize NSArray * variable =

Use protobuf from scratch in iOS There is protobuf-objc on github, and readme can teach us to install proto into our computer. Then, the protoc, that is, the protobuf compiler can compile the. proto file to generate some. h and. m files. In mobile

IOS basics-Four Range types of instance variables and four types of ios instance variables 1. to force an object to hide its data, the compiler limits the scope of instance variables to restrict its visibility in the program. However, to provide

Xcode compilation error and warning summary, xcode compilation Summary 1. error: macro names must be identifiers YourProject_prefix.pch Cause: Because you have corrupted the Preprocessor macro, you modified it when it is in . Solution: Select All

Comparison of Two Methods for creating objects in iOS development: ios objectsComparison of Two Methods for creating objects in OC Syntax: 1. Using new to create objects; 2. Using alloc and Init to create objects. Using new to create an object, the

Determines whether textField is empty and textField is empty.   :   Code: -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // TextField UITextField * textField = [[UITextField

IOS development, the system comes with the acquisition of facial expressions // Convert the number to # define EMOJI_CODE_TO_SYMBOL (x) (0x808080F0 | (x & 0x3F000)> 4) | (x & 0xFC0) -(Void) viewDidLoad {[super viewDidLoad]; // call int sym = EMOJI_

IOS -- Singleton design mode in Swift developmentRecently, I have developed a small application and encountered some common Singleton modes in Objective-c, but there are some differences in swift, I tried to find out that I couldn't play the cards

Common encryption algorithms for IOSLet's talk about the security considerations during game design. (I'm too lazy to type the game. I copied it directly from the design document. Please forgive me... for my own independent game, so I am entitled to

IOS review Note 11: Protocol and proxy1. FunctionMethods can be declared in the Protocol (variables cannot be declared ),As long as a class complies with this Protocol, it is equivalent to having all the method declarations in the Protocol.The

IOS learning-Table view 3 custom CellsPreface When I read the news today, Kobe slice may retire ahead of schedule. This stubborn man is coming to an end. Although I am not a fan of him, I am also excited, today's topic is based on Kobe Bryant, who

Object-c category, object-c category Category: adds a new method to a known class;I. Category: 1. Application of category methods:   Extension of existing classes: for example, you can extend the classes in the Cocoa touch framework. The methods

IOS UIWebView cannot determine the actual height of the web page @ Interface IndEditorDetailViewController () {UIWebView * _ webView; progress * _ progressView; NJKWebViewProgress * _ progressProxy;} @ end @ implementation progress-(void)

Clock rotation (IOS)Clock rotation (IOS)-(Void) viewDidLoad {[Super viewDidLoad];Self. secondHand. layer. anchorPoint = CGPointMake (. 5,. 9 );Self. minuteHand. layer. anchorPoint = CGPointMake (. 5,. 9 );Self. hourHand. layer. anchorPoint =

IOS development-mutating method sent to immutable object Error When I was working today, I encountered such a problem .. It's so careless. Mark,   11:44:34. 762 softwareApp [1435: c07] *** Terminating app due to uncaught exception

_ Bridge _ bridge_retained _ bridge_transfer, bridgetransfer _ Bridge only performs type conversion, but does not modify the object (memory) management right;_ Bridge_retained (you can also use CFBridgingRetain) to convert an Objective-C object to

[IOS UI advanced, iosui advancedA. Introduction1. What you need to know DrawRect: Method usage Draw common images: lines, polygon, and circle Drawing status settings: text color, line width, etc. Save and restore the graph context status

IOS AFNetworking 2.x JSON method, afnetworkingjson Writing in front (nonsense, can be skipped) is not updated for a long time, mainly busy (lazy ). Learn more and share more!During the official development process, we will inevitably