IOS

First involved in Runtime (1), first involved in runtime Objective-C is a dynamic language, and many things are determined by runtime. For example, the code first declares that testObject is an NSString, then creates an NSData Object, and saves the

IOS local persistent StorageCurrently, there are many methods for local storage, which are commonly used in the following ways: 1. The temporary cache refers to the temporary cache. The temporary cache is generally used to manage the content that

Solution to application startup failure during iOS debugging, ios debugging I recently used a third-party application in the iOS project to start my application. the following error occurs when I started my application with a third-party

Enumeration of basic IOS data types and IOS Data Types Enumeration is a basic data type in C language. By enumeration, you can declare a group of constants to represent different meanings. It is actually a set of Integer constants. Enumeration is a

[Reading Notes] iOS network-asynchronous request and running cycle, Reading Notes ios Asynchronous requests need to run a loop. When data is transmitted to the server or received by the client, the running cycle is used to implement communication

The height of UITableViewCell calculates the height of uitableviewcell from the beginning of chaos to the intersection of Heaven and Earth.[Original] UITableViewCell height calculation from chaos initial to Tianji jiaotai  This article is based on

XML data parsing (system method) and xml data parsing method XML is a self-describing data exchange format. It is a very important data exchange format and has been used in various computer languages for many years. XML is similar to HTML, and has a

[Reading Notes] iOS-reference count, Reading Notes ios-count Cocoa uses a technology called reference counting, which is sometimes called reserved counting. Each object has an associated integer called its reference counter or retention counter.

OC basics-self keywords, oc-self keywords Use of Self: 1 self cannot leave the class and leave the class without any meaning 2. self automatically classifies methods and object methods. 3. When using self, you only need to pay attention to the

IOS project development practice-learn to use the TableView list control (3) Understand Section In the list control TableView, Section can be used to separate cells with different functions. Section is used in the following iPhone settings interface.

IOS NSFileHandle, iosnsfilehandle NSFileHandle is mainly used to read and write the file content. NSFileMange is mainly used to perform operations on files and obtain file information. Common Handling Methods + (Id) fileHandleForReadingAtPath :(

For IOS basic, set the APP name, setting icons, and adding images waiting for loading, 1. The default name of our app is our project name, so we usually change a more friendly name. The change method is as follows: Find the InfoPlist. strings

Add watermarks for iOS photos and for iOS photos During the project, we need to mark the photos to prevent image theft by others. Therefore, we need to add a watermark to the photo to indicate its uniqueness. Adding a watermark is not to add several

NSArray sorting methods /* In general, arrays commonly used in OC are sorted by sortedArrayUsingSelector: sortedArrayUsingComparator: sortedArrayUsingDescriptors: * // * 1. sortedArrayUsingSelector, you can use sortedArrayUsingSelector: method. The

CALayer knowledge: Create a rounded corner image layer with a shadow effect and a custom painting content layer, The effect is as follows: KMLayerDelegate. h 1 #import 2 3 @interface KMLayerDelegate : NSObject4 5 @end KMLayerDelegate. m 1 # import "

[Learning notes] [OC language] set Method and get method, learning notes ocsetget 1. Use Cases of the set and get Methods@ Public members can be assigned a value at will. The set and get methods should be used to manage member access (such as

How to Create a proxy in Objective-C and create an objective-c First, we need to create a class. In order to facilitate understanding, we will simulate finding an intermediary to rent a house in real life. Therefore, we need to create a Person class

Learning 8_KVC and dictionary Conversion Models for ios Key Value Coding is a standard component of cocoa. It allows us to access attributes by name (key). In some cases, the code is greatly simplified, which can be called the big trick of

CATransition animation effect and catransition Animation CATransition * Transition = [CATransition animation]; // Animation time Transition. duration = 2; // Set the style Transition. timingFunction = [CAMediaTimingFunction functionWithName:

Encapsulation, inheritance, polymorphism, and Objective-C polymorphism in objective-c Advantages of encapsulation: Benefits of inheritance: Notes for inheritance: Inheritance and combination: 1 @ interface Score: NSObject 2 {3 int _ cScore; 4 int _