IOS

Settings of the iOS Status Bar (UIStatusBar)Knowledge popularization The status bar on iOS refers to the top 20 pixels high.The status bar consists of two parts: Foreground: displays the battery and time; Background: displays the black or image

IOS stage study 34th days notes (UI widget UISegment-UISlider-UIStepper-UIProgressView-UITextView Introduction), uiprogressview IOS Learning (UI) knowledge point sorting I. UI Widgets1. UISegmentedControl multipart selector instance code 1-(void)

For iOS development, you have to worry about data storage-dry goods, ios dry goods 1. preference settings-mostly used for user name, automatic login, and other data storage Many iOS apps support preference settings, such as saving user names,

LinkBlock and ioslinkblock for iOS chained programming framework LinkBlock for iOS chained Programming First of all, thank you for helping me find the stars. [LinkBlock GitHub download] From the context, objc is one of the very strange languages. If

To create my first app in iOS with Xcode (create my first iOS app in Xcode), xcodeiosTo create my first app in iOS Create the project. In the welcome window, click "Create a new Xcode project" (or choose File> New> Project ).Xcode opens a new

Note on the use of NSJSONSerialization in iOS, and the use of block in ios This is the first Json parsing method. Because it is easy to use and has a high resolution efficiency, NSJSONSerialization is the best choice for Json data parsing. Below is

IOS multithreading implementation 3-GCD, ios multithreading 3-gcd When you knock on the three gcd letters, the first one in sogou shows "rolling sheets" ^_^ I. Introduction GCD is the Grand Central Dispatch (a powerful Central Scheduler). It is

Pitfalls caused by properties in iOS developmentCopy-modified NSMutableArray attribute (property) initialization For attributes: @property (nonatomic, copy) NSMutableArray *someArray; If self. someArray is used during initialization: self.someArray =

IOS project development practice-make view translation animations and solve moving exceptions Today, I tried to make a translation animation for the view and encountered some problems. Now I want to share it with you. Through the animation effect,

IOS-Precautions for local file and data security, and ios-Data Security 1. program file security. By obfuscation and encryption of the JavaScript source code, hackers can easily read and tamper with related logic, and prevent leakage of

Ios ui basics 08 and iosui08 Custom height cell // Create a custom cell and add a child Control Using initWithStyle (note: The child control must be added to contentView)-(instancetype) initWithStyle :( UITableViewCellStyle) style reuseIdentifier

Tab implementation principle, Tab implementation principle 1: implement the class rolling effect of the header The main code is as follows: UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 64, screen_width, 40)];

Ios ui basics 07 and iosui07 TableView Attribute// Set the cell height of each row @ property (nonatomic) CGFloat rowHeight; // set the height of each set of headers @ property (nonatomic) CGFloat sectionHeaderHeight; // set the split line

IOS multithreading technology 2IOS multithreading technology 2 NSOperation NSInvocationOperation // Create a queue NSOperationQueue * queue = [[NSOperationQueue alloc] init]; // create a subtask, define a subtask to be a subclass of NSOperation

CocoaPods, cocoapods Facilitate management of numerous third-party libraries (automatic configuration of relevant information) and provide dynamic updates (using Terminal Operations) Install tools first sudo gem install cocoapods Then we need to

Ios ui basics 05 and iosui05 UIScrollView UIScrollView procedure 1. Create UIScrollView 2. Add the content to be displayed to UIScrollView. 3. Set the rolling range (contentSize) of UIScrollView) Note: If you want

IOS stage study 31st-day notes (UINavigationBar Introduction), iosuinavigationbar IOS Learning (UI) knowledge point sorting   I. Introduction to UINavigationBar1) concept: UINavigationBar is a class object used to define buttons in the navigation

CoreText and coretext I. Introduction to basic knowledge1. Character and Glyphs) An important process of text display in the typographical system is the conversion from a character to a font. A character is an element of the information, and a font

IOS UI basics 01 and iosui01 Controller 1. What is a controller? Any class inherited from UIViewController is called a controller. 2. Role of the Controller: Manage the UI interface (responsible for managing the creation of the UI

IOS multithreading-GCD, iosgcd What is GCD? GCD is Apple's new abstract C-layer-based API for multi-threaded programming. Combined with Block, GCD simplifies multi-threaded operations, making thread operations more secure and efficient. Before the