Why does block use copy and how to solve circular references? blockcopy

Why does block use copy and how to solve circular references? blockcopyDuring the completion of the project, the block is inevitably used, because the block is more readable than delegate and notification, and the code looks concise. Therefore, a

IOS network analysis-(12 UIWebView Introduction), iosuiwebview

IOS network analysis-(12 UIWebView Introduction), iosuiwebview In this article, we only need to know what UIWebView is. UIWebView is a UI control provided by Apple to display webpages. It is also the most memory-occupied control. After iOS8.0, A

IOS pull-down refresh-pull-up loading principle, ios Load

IOS pull-down refresh-pull-up loading principle, ios LoadPreface explain the attributes of UIScrollView before refresh and load down. ContentSize is the area where UIScrollView can be rolled. ContentOfinset the apple official documentation

Use NSCalendar and UICollectionView to customize the calendar, and implement sign-In display and custom calendar control sign-in

Use NSCalendar and UICollectionView to customize the calendar, and implement sign-In display and custom calendar control sign-in Some time ago, a calendar can be signed in because of work needs to be implemented to record the implementation idea.

IOS development Bug

IOS development Bug Collect bugs encountered during development and learning.     1. The error message is returned when the cell ID is used to set the position. This causes program to crash. 2. For the divisor algorithm, you can directly

Questions about iPhone images .,

Questions about iPhone images ., Because the screen resolution of iOS devices is different and the screen resolution is large or small, displaying the same image on different devices may cause the image to be stretched and deformed, seriously

IOS gestures and ios gestures

IOS gestures and ios gestures In IOS, gestures can give users a good experience. Therefore, it is necessary to understand gestures. (There are many notable points in setting gestures) * Yes. The click fails to respond when the value is set to Yes * *

NSURLSession network request, nsurlsession request

NSURLSession network request, nsurlsession request I personally feel that it is difficult to find simple network requests on the Internet. Maybe it's just me that I'm not familiar with it. All of them have the following sections. Although they are

4.0 multithreading, 4.0 Multithreading

4.0 multithreading, 4.0 Multithreading 4.0-1.1 Processes Concept: process refers to an application running in the system (each APP in the operating system is a process) Nature: each process is independent, and each process runs in its dedicated

Get the iPhone's UDID and device name., iPhone eudid

Get the iPhone's UDID and device name., iPhone eudid About the device name: The device name of the iPhone can also be viewed on the mobile phone: settings-General-about local-Name (the device name can be changed by yourself) About UUID: What?

Package and debug static libraries (2), package and debug static libraries

Package and debug static libraries (2), package and debug static libraries The last lecture...1. the last time I said that the static library of the real machine can only be used on the real machine, and the static library of the simulator can only

IOS-Smooth Solution for setting the view rounded corner Style

IOS-Smooth Solution for setting the view rounded corner Style Code // Set the corner view style-(void) setUpSelfView {// Shadow self. layer. shadowColor = [UIColor blackColor]. CGColor; // black self. layer. shadowOpacity = 0.33; // shadow opacity

New Features of iOS 9: a collection of developer articles (constantly updating ......)

New Features of iOS 9: a collection of developer articles (constantly updating ......)After iOS was updated to 9.0, after Xcode7.0, Apple opened a number of new APIs. Here we have sorted out some new features after iOS9 for you to learn and exchange.

IOS Safari reading mode

IOS Safari reading mode This is an article prepared in 2013. I will share it with you for your reference.Key Points (1) reading mode detectionAfter the frame is loaded, a timer is triggered to check whether the reading mode can be used. The method

IOS miscellaneous pen-9 (MD5 encryption), ios-9

IOS miscellaneous pen-9 (MD5 encryption), ios-9 First, an introduction to MD5 * From a big bull * Message Digest Algorithm MD5 (the fifth version of the Message Digest Algorithm in Chinese) is a hash function widely used in the computer security

IOS project-related secondary encapsulation of @ AFN & amp; SDWeb, ios Project @ afn

IOS project-related secondary encapsulation of @ AFN & SDWeb, ios Project @ afn I. AFNetworking and SDWebImge are powerful and common third parties. However, in actual applications, they need to be encapsulated for reuse. Today I will share with you

Selector, jquery Selector

Selector, jquery Selector ====================================== Selector ====================================== [Recognition selector] SEL 1. selector (SEL) is a variable type. 2. selector is used to load member messages (member method)   People *

IOS, ios9

IOS, ios9 IOS database operations: add, delete, search, and modify First, you need to create a database: the database of this program is a trace database written in the plug-in of Firefox browser. Steps for Firefox to find SQLite Manager: Step 1:

WeChat Swift full project application source code, WeChat swift source code

Full Swift project application source code, swift source code TSWeChat descriptionA WeChat alternative, written in Swift. Running Environment Cocoapods 0.39.0 + IOS 8.0 +/Mac OS X 10.9 + Xcode 7.2 + Source code download:

Basic OC string operations and basic oc operations

Basic OC string operations and basic oc operations The variable string modification method has a return value (re-pointing to the new string address) The variable string modification method does not return values (modifying the string

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