IOS

IOS JSON data parsing and iosjson data parsing JSON is a common data format, which is clearer than the XML layer. Here we introduce two methods for parsing JSON: NSJSONSerialization and JSONKit. NSJSONSerialization was launched after iOS 5 and is a

OC, oc Language  Implementation To implement plotting, you usually need to define a subclass of UIView, override the parent class's-(void) drawRect :( CGRect) rect method, and implement plotting operations in this method To display the download

IOS-CALayer & CAAnimation, ioscalayer plotting 1. CALayer 1. CALayer CALayer belongs to the QuartzCore. framework. We do not need to manually import this library from Xcode5. CALayer is a layer. When the UIView we draw can be displayed on the screen,

IOS multi-thread NSThreadA running application is a process. By default, a main thread is enabled for a process, but operations in the main thread are serialized, that is, when multiple tasks need to be completed at the same time, they are executed

OC, oc Language I. process-oriented 1> Thoughts Process-oriented is a process-centered basic programming concept and does not support the object-oriented features. Process-oriented is a modular programming method. 2> Development Method

Implementation of spray gun typing animation in iOS The implementation principle is relatively simple. I will not introduce it too much here.   #import ViewController.h@interface ViewController ()@property (weak, nonatomic) IBOutlet UILabel

Reuse of IOS drop-down menusSince I used the drop-down menu before, I have spent some time looking back and finishing it, gradually improving the drop-down menu and providing some basic functions, in this way, you can reuse it if necessary in the

The time interval for calculating two dates in iOS development, and the time interval for calculating two dates in ios development // Create a formatted object NSDateFormatter * dateFormatter = [[NSDateFormatter alloc] init]; [DateFormatter

Cocoapodsframework cannot be inherited when swift uses CocoaPods to import the third-party library's framework parent class to the subclass. When I encountered such a problem in today's development project, I used cocoapods to import the

Value passing between iOS pages: One-case value passing, block Value passing, and iosblock There are a lot of values passed between ios pages. The front side has already shared the attribute transfer value and the proxy transfer value. Today we

Analysis of nsuserults ults in iOS user preferences NSUserDefaults is a lightweight data storage mechanism. For details about how to use it, refer to iOS project development practices-use user preferences data API storage information, iOS project

Analysis of iOS-instancetype OC is a rapidly developing language, such as ARC, object literals, subscripting, blocks, and Auto Synthesis. Let's see its amazing changes. Instancetype is a keyword provided by clang starting with clang3.5, indicating

IOS pch file details After Xcode6, including the current Xcode7, The. pch file will not be generated automatically. It seems that it is no longer recommended. However, when looking at many other projects, this file is still included. Let's talk

IOS checks whether a url schemes is set in the ApplicationRecently, another application A needs to jump to our B (with url schemes set) and then return to, when A is returned, A needs to set A url schemes to redirect B to. However, after A jumps to

IOS multi-thread NSThread and ios multi-thread nsthread A running application is a process. By default, a main thread is enabled for a process, but operations in the main thread are serialized, that is, when multiple tasks need to be completed at

NSPredicate predicate usage in IOS development, iosnspredicate Predicate Programmers should have some knowledge about SQL statements, whether they have been in college or from training institutions, back-end or front-end. We know that, in SQL

Question: How can I get the first letter of Chinese characters and pinyin? Generally used for address book construction, Chinese Character address book /* The programmer's goal is Conquer the sea of stars ~ */ -(NSString *) firstCharactor :(

SQLite database operations in iOS, iossqlite Implement SQLite database operations in iOS: 1. Import framework (libsqlite3.0.tbd) 2. Import header file 3. add, delete, modify, and query data Demo process for simple SQLite database operations: 1.

Sharing the UISearchController search bar UI Technology in iOS UISearchController inherits from UIViewController // In iOS 8.0 and later versions, you can use UISearchController to conveniently add search boxes to UITableView. in earlier versions,

Solve the problem that other applications cannot be opened in the App under IOS9, ios9app Open the info. plist file and add the following code under the root node. This is due to the new permission management mechanism of IOS9.