IOS JSON parsing encounters Error:error Domain=nscocoaerrordomain code=3840 "The operation couldn ' t be completed.__ programming

The Error domain=nscocoaerrordomain code=3840 "The operation couldn ' t be completed. (Cocoa error 3840.) " (unescaped control character around character 1419.) userinfo=0x1563cdd0 {nsdebugdescription=unescaped control character around character 1419

Mango iOS Development duplicate symbols for architecture x86_64 error

"Main content:" 1. Error Tips 2. Analyze the cause of the error 3. Problem-Solving approach First, error tips This error may be encountered frequently in the process of writing code: ld:4 duplicate symbols for architecture x86_64

IOS get local IP address

Original: Http://blog.zachwaugh.com/post/309927273/programmatically-retrieving-ip-address-of-iphone For my app, Quickpic, I needed to show the user IP address of the their iPhone so they could type in the URL to the browse R. The IPhone SDK provided

Why update the UI in the main thread (iOS development)

During the iOS development process, I always knew that updating the UI needed to be in the main thread, but I didn't think much about why it was in the main thread, or why I couldn't update the UI in the child thread. Today I find time to look up

Ios-watchdog (watchdog) mechanism

To prevent an application from consuming too much system resources, the Apple Engineer Gate that developed iOS designed a "watchdog" mechanism. In different scenarios, the watchdog monitors the performance of the application. If the runtime is

ios--Algorithm--BASE64 Chapter

As a common standard of string transcoding in various languages, Base64 is loved by programmers. To introduce: The BASE64 encoding requires 3 8-bit bytes (3*8=24) to be converted to 4 6-bit bytes (4*6=24), followed by 6-bit two, to form 0-bit bytes.

AOP-oriented programming of iOS decoupling mode

aop

MVVM decoupling Demo and blog introduction approach to slicing programming (AOP) Demo At runtime, the programming idea of dynamically slicing code into the specified method of the class, specifying the location, is the aspect-oriented programming.

iOS Development Uicollectionview Properties Introduction

The initial recognition of CollectionView through a layout strategy-(Instancetype) initWithFrame: (CGRect) frame collectionviewlayout: (uicollectionviewlayout *) layout;Gets and sets the layout of the collection@property (nonatomic, strong)

Coreimage FRAME (framework) in IOS

Coreimage Framework Composition Apple has helped us classify image processing to see its structure: Mainly divided into three parts: 1) Definition part: Coreimage coreimagedefines. See the name of Righteousness, represents the Coreimage this

iOS gesture unlocking and fingerprint unlocking

effect Find a way to use the picture online, Kkgesturelockview, but if you want to do animation aesthetics, you have to draw, on this basis to customize, first look at the effectgesture Unlock 1. The first gesture to unlock the area is a custom

IOS Issue Certificate Request

The overview is based on this tutorial. Http://st.appcan.cn/dev/dev_iosdom.html Due to Apple's mechanism, the installation of applications on a non-jailbreak machine must be done through the official App Store, developers can upload the App store

Deployment of iOS applications in Tomcat release

1. Generate CA.CRT, SERVER.P12, Server.jks certificate Files 2. In Tomcat Conf\server.xml configuration Where Keystorefile is the SERVER.P12 path, Keystorepass is the SERVER.P12 password, the default is ==123456== ; Truststorefile.jks path,

IOS: multimedia (18-01-25), ios multimedia 18-01-25

IOS: multimedia (18-01-25), ios multimedia 18-01-25 1. Audio 2. Video 1, 2. AVPlayer   1. Audio         2. Video 1,     2. AVPlayer 0) write in front AVPlayer mainly includes AVPlayer, AVPlayerItem, and AVPlayerLayer, which correspond to Controller

OS 10 Device Permissions (camera, album, etc.), OS Permissions

OS 10 Device Permissions (camera, album, etc.), OS Permissions For iOS 10 devices, the following fields must be added:   NSPhotoLibraryUsageDescription the App requires your consent to access the album NSCameraUsageDescription the

IOS Code is applicable to the layout of all iPhone phones.

IOS Code is applicable to the layout of all iPhone phones.IOS Code is applicable to all iPhone mobile phone la implementations This article mainly describes a set of code adapted to all iPhone layout solutions. The main point is to understand the

Option meaning of info. plist, meaning of info. plist

Option meaning of info. plist, meaning of info. plist 1. application does not run in background (container name: UIApplicationExistsOnSuspend) from the end of iOS4.0, when you apply the program line, press Home terminal, the application does not

After iOS 11 is updated and iPhone X is released, problems encountered in the project and adaptation, iosiphone

After iOS 11 is updated and iPhone X is released, problems encountered in the project and adaptation, iosiphone 1. When the UITableView slides, the sliding bars on the right are suddenly long and short, and the endless loop is pulled and refreshed

Use OLAMISDK to implement a 24-point computing iOS program for voice input numbers.

Use OLAMISDK to implement a 24-point computing iOS program for voice input numbers.Preface In current software applications, the input mode is mainly text input, but the language input mode is more and more widely used. This is a 24-point iOS

Data to Model type erasure problem, data to model type

Data to Model type erasure problem, data to model type If Class B inherits Class A and Class B is included in the Data, convert Class B to Data and store the Data. Since the type declared by the Model is A, the transferred data is also A, so that

Sqlite and FMDB for iOS, sqliteFMDB for iOS

Sqlite and FMDB for iOS, sqliteFMDB for iOS The database sqlite plays an important role in iOS. This article mainly describes the concurrency, transactions, and common corruption issues of sqlite. Next, we will briefly describe the third-party

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