IOS

Common GCD methods and common GCD Methods // 1. Create a main thread (Serial) Dispatch_async (dispatch_get_main_queue (), ^ { // Refresh the interface code }); // 2. Create an asynchronous thread (parallel) Dispatch_async (dispatch_get_global_queue (

Personal Understanding of custom UICollectionViewLayout Custom viewlayout Custom UICollectionView mainly uses the following methods:   Taking Apple's official lineLayout as an example, this is an extension of UICollectionViewFlowLayout, -(Id) init {

IOS prints Debug logs. The following macros are briefly introduced: 1) _ VA_ARGS _ is a macro of a variable parameter. The macro of this variable parameter is added in the new C99 specification, currently, only gcc is supported (not supported by the

Create a chat interface and a chat interfaceLayout of imitation QQ chat Most of the materials found currently have such results, and the design ideas are the same, A tableview uses a custom cell. After the cell is successfully created, it uses the

IOS image resources Images Assets, iosassets 1. Click and openImages. xcassetsTo see what is happening:]:   2. In the figure, we can see that there are two dashed boxes in the middle. We feel that we can drag the file in directly. OK, prepare the

JSON-to-Model internal resolution, json-to-model resolution I. Ideas: 1. Obtain all attributes and their types through the model type. 2. process the obtained json. Type processing 3. Consider the inconsistency between the dictionary key value and

Swift dynamically adds UIImageView and adds events, Swift dynamically adds UIImageView and adds events: 1. Create a UIImageView instance and initialize it. 2. Set the user interaction attribute userInteractionEnabled of UIImageView to True. 3. Add a

IOS development-code generation TabBar and view switching I have explained in my previous blogs that using the code to generate a navigation bar without using the storyboard and nib files, for details, refer to iOS development-interface jump and

(No. 00005) iOS pop-up game (III): Starting from the main scenario   I also read the code of the entire project in a rough way. There are many examples: Many classes are closely related to other classes, so you may encounter code in some other

IOS-xib use 2 --- xib encapsulation and MVC, ios-xib2 --- xibmvc I. (M) Create a model: Bytes --------------------------------------------------------------------------------------------------------------------   II. (V) Encapsulation xib:

[Code Note] The UIAlertView with the input box and the uialertview with the input box I ,. Ii. Code. // Click anywhere. The input box (void) touchesBegan :( NSSet *) touches withEvent :( UIEvent *) event {UIAlertView * dialog = [[UIAlertView

Multi-thread programming in Ios development-NSThread and iosnsthread The IOS program updates the UI view and responds to the screen touch event through the main thread during running. However, there will be some time-consuming work during view

IOS transition Animation Generally, we use two types of transfer push and present. Present /** 1. set proxy-(instancetype) init {self = [super init]; if (self) {self. transitioningDelegate = self; self. modalPresentationStyle =

You can create controllers in several ways. How to Create a controller: Create directly: XZOneViewController * one = [[XZOneViewController alloc] init];One. view. backgroundColor = [UIColor redColor];Self. window. rootViewController = one;  

OC and OC Summary:In oc, We need to compile a class. First, we need a. h header file and a. m implementation file. Generally, the classes we create inherit the root class, because the root class helps us implement a lot of practical methods, and the

IOS development-use MBProgressHUD to increase user experience (2) In the previous blog "iOS development-using MBProgressHUD to increase User Experience", I used MBProgressHUD encapsulated by others for loading prompts, which is quite convenient.

Experience-use const and macro in PCHMost of the time, due to the development needs, we often need to define some variables used in the entire project in pch. In general, in the previous development process, we are all used to writing a macro

Basic Swift syntax (1): Basic swift syntax Swift is a new programming language used to write iOS and OS X applications. Swift combines the advantages of C and Objective-C and is not limited by C compatibility. Swift adopts a secure programming mode

Listen to the keyboard to prevent the input from overwriting textfiled and listen to textfiled [[Nsicationcenter center defacenter center] addObserver: self selector: @ selector (keyboardwasChange :) name: UIKeyboardWillChangeFrameNotification

Simple implementation of waterfall stream and simple implementation of waterfall stream In fact, the waterfall stream is to write the class UICollectionViewLayout as the style you need, so we must first inherit this class Override some methods in