IOS

There is no checkbox or radio button in IOS, which is quite speechless for android kids shoes. It doesn't matter. We can write a view to implement our own tickets and check boxes.First, add two images to your resource. One is the selected status of

When creating certificate via KeyChain in an old mac, then you want to use it in a new mac, you may see the following warning "valid signing identity not found" inprovisioning profiles library. how to resolve it? Two solutions: Transferring you

What I want to do is to have several sections in a table. Each section stores individual addresses. The last section is used to add personal addresses. If the number of addresses reaches 5, the section of the last added address is not displayed. The

It is easy to display the UIView rounded corner. Only three lines of code are required.CALayer * layer = [avatarImageView layer];[Layer setMasksToBounds: YES];[Layer setCornerRadius: 9.0]; However, if you add a shadow to a rounded view, the

When we develop ios applications, especially e-commerce applications, we often encounter bar code scanning business needs. Fortunately, we already have open-source sdks for us-bar code sdks for ios, the following describes how to use this

1 PrefaceThe BI integration in Xcode is rich in controls, but sometimes it cannot meet our needs. Today we will learn how to use XIB to customize a UIView for reuse. 2. Detailed ProcessDirectory View:    2.1 create a single view application iOS

Block was introduced at the beginning of ios4.0. It is characterized by the ability to execute inline and pass it as a parameter to a function. It defines block variables and ^ is used for operators. -(Id) loadNibWithClassName :( NSString *)

CorePlot tips:Set the padding:Graph. plotAreaFrame. paddingLeft + = 5; Graph. plotAreaFrame. paddingTop + = 5; Graph. plotAreaFrame. paddingRight + = 5; Graph. plotAreaFrame. paddingBottom ++ = 17.5;   Disable zooming: (two

// Create a button for the rounded rectangleUIButton * button1 = [UIButton buttonWithType: UIButtonTypeRoundedRect];// The following types of buttons can be defined,// Typedef enum {// UIButtonTypeCustom = 0, custom Style// UIButtonTypeRoundedRect,

I. View 1. The window on the iphone is an instance of the UIWindow class (one mobile app only has one UIWindow ). 2. The UIView class is used to implement the view. UIView provides methods to add and delete subviews. A view can have multiple child

The memory of mobile devices is extremely limited. Applications must handle low-memory to avoid program crashes due to memory usage.   How to handle low-memoryAn application usually contains multiple view controllers. When you jump from view to

1 PrefaceIn many object-oriented applications, the creation cost of some objects is too large or too complex. It would be much easier to recreate the same object and make minor changes. We can reuse existing objects through slight changes to adapt

1 PrefaceFactory methods can be seen in almost every object-oriented language application. Factory methods are components of abstract factory methods. The object factory is similar to the actual factory that produces tangible products. For example,

1. Obtain the system language settings NSUserDefaults * userDefault = [NSUserDefaults standardUserDefaults]; NSArray * ages = [userDefault objectForKey: @ "AppleLanguages"]; NSString * preferredLang = [ages objectAtIndex: 0]; 2 file size in the

Let's talk about small examples in our daily life. When we are still young, We need to drink milk. In order to drink fresh milk, we often go to a store dedicated to ordering milk and put our residential address, the brand of the purchased milk also

//// ViewController. m // ScrollView_T1119 // Created by du jia on 13-4-8. // Copyright (c) June 2013 dujia. all rights reserved. // # import "ViewController. h "@ interface ViewController () @ end @ implementation ViewController-(void) viewDidLoad {

First introduce the file: Libsqlite3. FMDB (including Global. m and Global. H files) Disable arc Use mesaSqlite to create a database and introduce it to the file. Second: First, in Global. find # define kDBName @ "shuJu. db ", if the name of the

  1. Create a Windows-base Application. Open the main. m file and add the following code to the main function: // Obtain the default user information NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults]; // Obtain all language

In Objective-C, NSString and NSMutableString are core classes that process strings. The biggest difference between these two classes is that after NSString is created and assigned a value, the content and length of the string cannot be dynamically

Demo function: ios paging example source code. Iphone 6.1 passed the test. Demo Description: The main page control code in AppDelegate. m. MyViewController. m is a flip page.   Demo code: AppDelegate. m   (void)loadScrollViewWithPage:(int)page {