IOS

I. KVC and KVO* "KVC": key value Coding * objective: to indirectly modify or obtain object attributes and reduce coupling between programs (classes and classes.* "KVO": key value Observer (key value observation), Observer mode. (multiple methods are

Bounds coordinates: Custom coordinate system. setbound specifies the coordinates in the upper-left corner of this view in this coordinate system, Default Value (0, 0) Frame coordinate: coordinates in the upper left corner of the Child view in the

Network request steps: Get request: # Pragma mark-this is a private method. Try not to directly use attributes in the method, because attributes are generally associated with the interface, we can use the attribute # pragma mark Get logon method

The previous section mainly introduced the basic usage of the swift language. Today we will introduce the usage of the swift struct. The usage of the struct in swift is different from that in other languages, however, you can understand the struct

1. Environment Client development: MacOs 10.8.5 Server development: Centos6.3 64-bit 2. Software preparation Apache httpd 2.2.27 OpenSSL 0.9.8za 3. Prepare the client The developer account of Apple is roughly divided into three types: individuals,

Text Markup Language is used for layout. The most commonly used HTML language is used. HTML can be understood as a set of XML languages with special tags. I. How xib and storyboard are displayed in iOS In iOS, there are three main interface layout

When we develop the registration interface, the last few registration conditions are often easily blocked by the system pop-up keyboard, such: As you can see, the mailbox condition is blocked. How can this problem be solved? I calculated the offset

  Today we will introduce swift functions, swift functions and c # And js statements, but they are quite different from object-c statements. Let's just get started. 1: function -- constant parameter Func function name (parameter variable: type,

  Tuples Tuples (Tuples) Combines multiple values into a composite value. The value in the element group can be of any type, and each element does not need to be of the same type (the types of each element are independent and do not interfere with

The following keywords reference passing parameters, attributes, modifying member variables, static variables, indexes, and constructor Overloading Anyone who has read The Swift Programming Language can see that all of The above statements are not

1. AudioToolbox Overview Through the AudioToolbox framework, you can register a short sound to the system sound service. The sound registered to the system sound service is called system sounds. It must meet the following conditions.(1). the

Control Flow If and switch are used as condition statements, and for-in, for, while, and do-while are used as loops. Conditions and loop parentheses can be left blank, however, parentheses outside the body must be written. 1 let individualScores = [7

    There is no doubt that ViewController (VC in this article) is the most important class for building a Cocoa or CocoaTouch program using MVC, in our daily work, the most time and effort is to write code for the VC part. Apple products focus on

The following error occurs when loading an https site. Therefore, you have made some modifications to the embedded webview in iOS, so that it can load the http site or load the https site, The following error occurs when I load the https

Passbook is one of the hottest iOS 6 technologies released by Apple. It brings more ground-breaking than we can imagine. Passbook is a great combination. The combination of the four independent technologies brings a brand new experience to iPhone

In iOS development, you can play a video in either of the following ways: MPMoviePlayerController (you need to import MediaPlayer. Framework) or AVPlayer. For the differences between the two classes, refer to examples. This blog mainly introduces

Generate all types of icons based on a 1024 icon and create the Contents. json file. The command line is supported.The main reason is that I have to save N types of icons every time I use Phtosohop. I am bored and have not found any suitable tools

This article mainly includes three aspects: Use console to check app status Logging and mastering NSLog Use the lifecycle of an object to track memory usage. Use Console to check app status The small black box at the bottom of Xcode is a good friend

Common attributes (the red part is the key that is displayed when opened in a text editor) )-Localization )-The name displayed after the program is installed. It must be 10-12 characters long. If it is exceeded, the abbreviated name will be

Recently, Apple released IOS7.1. It is said that every time Apple is released, it affects developers. This time, we have a little bit of trouble.To put it bluntly, the reason why AdHoc cannot be downloaded in ios7.1 is that ios7.1 does not accept