IOS

[IOS category usage] --- modify the leftBarButtonItem icon in the navigation bar Category: Modify the Item icon in the navigation bar of a specific ViewController. A problem occurs in the project:When a newly added VIewController1 wants to push to

IOS learning-sharing basic learning materials for beginners /*1. OC introduction:OC is a superset of C language. It adds the smallest object-oriented syntax based on C language.2. Compare C to learn OCData Types, keywords, process control, and

Regression-iOS APP shelving Process I haven't gotten a blog for a long time. I have learned a lot from my work and study in the last two years! At present, mobile Internet development is developing rapidly in the current mobile data age. Because I

GCD usage in iOS What are the advantages and disadvantages of multithreading? Three queue types in GCD: The main queue (main thread serial queue) Global queue (Global concurrent queue) Custom queue (Custom queue) Group queue (queue Group) common

IOS-change UINavigationBar style + change return ButtonItem text After iOS7. The default return button font color is blue and displays the title of the parent VC (upper-level interface ).If you want to modify it, you can use the following

Knowledge about tableView in IOS Introduction Published using GitBook tableView Performance Optimization-cell Recycling Method 1tableView Performance Optimization-cell Recycling method 1/*** When to call: Whenever a cell enters the field of view,

IOS RunLoop Analysis 2. iosrunloop Analysis In the previous article, we talked about several runloop modes. What do we need to do in the mode ??? There are three modules in the Mode:Event Source (Input Source) Source Source: By Official

IOS development-interview, ios development -- Today, I went to the interview early in the morning. The company was very close to my family. It took me an hour to walk and print my resume. I thought it was good to ask the company interviewer, I also

IOS-Automatic Layout code version (original) and ios-original layout codeIntroduction basic knowledge under certain circumstances we need to use autolayout so that we can associate the positions of views and views. Horizontal: The minimum width of

IOS stores data dictionary to sandbox, and ios stores dictionary sandbox 1. Create an account data model to store the data returned from the server. Generally, the returned data is a dictionary containing various information of the login user. This

Use of GCD-related functions GCD It is one of iOS multi-thread implementation solutions and is very common. It is also known as a great central scheduler. Is a solution proposed by Apple for multi-core parallel computing   1. One-time

Parameters of iOS-CGContextAddArc Using UIGraphicsGetCurrentContext () to draw circles may encounter CGContextAddArc (CGContextRef _ Nullable c, CGFloat x, CGFloat y, CGFloat radius, CGFloat startAngle, CGFloat endAngle, int clockwise) Don't be

[Code Note] Get the text height after the Rich Text settings, after the notes I ,.   2. Engineering Drawing. 3. Code. RootViewController. h #import @interface RootViewController : UIViewController@end   RootViewController. m # Import

IOS network-simple introduction (I)-> third-party SDWebImage and iossdwebimage First, we take the most commonly used UIImageView as an example to introduce the implementation principle: 1) UIImageView + WebCache: setImageWithURL: placeholderImage:

NSURLConnection study notes, nsurlconnection Although we now use third-party libraries to obtain network data, we will also use Apple's official NSURLSession, but some things need to be learned before they can be qualified to say no, isn't

Memory Management and Memory Management Software ====================================== Memory Management ======================================   [Q] What did memory management do? How to create and release memory in oc.   Oc Memory

IOS 2016 interview question 3, ios2016 1. OC Memory Management Mechanism 1 ). when you create an object using the new, alloc, and copy methods, the reserved counter value of this object is 1. when you no longer use this object, you are responsible

IOS-UICollectionView (original) and iosuicollectionviewPreface UICollectionView is a new data display method. In short, it can be understood as a UITableView with multiple columns (please note that this is the simplest form of UICollectionView ). If

Ios learning Summary (1), ios learning Summary Original article address Download and open xcode. Create a new project, as shown in: Click Create a new Xcode project, select Application under ios, and click Single View Application to Create our first

IOS SDWebImage implementation principle explanation, iossdwebimage   Before that, I wrote about how to use SDWebImage, mainly to use and obtain network images. If you have not read it, you can check it out. This article will mainly introduce the