IOS

Why ios cannot obtain deviceToken The deviceToken cannot be obtained in the following method, -(Void) application :( UIApplication *) application didRegisterForRemoteNotificationsWithDeviceToken :( NSData *) deviceToken {NSLog (@ "deviceToken: % @"

IOS_21 group_ipad neutron controller screen adaptation Finally: Important screen adaptation techniques in iPad, Add a contentView placeholder first, And only set the frame in the viewDidLoad method, Because no matter whether the horizontal

IOS_21 basic use of group_uicollectionview Finally: Code snippet: DealListController inherits from UICollectionViewController Self. view already contains a UICollectionView And the data source and proxy are already the current controller self

IOS: Android-like unlock effect [go], iosandroid The principle is very simple. Listen to a series of touch events in the view. When the finger position is near a button, judge the selected button and draw a line. As follows:     You

IOS app screenshot Since the launch of the iPhone, it has provided the screenshot function, which is simple and easy to use. Therefore, there is no need for screenshots for applications. However, sometimes we will still encounter this requirement.

IOS sets a blank interval between cells in TableView. 1. Set the number of sections, that is, how many cells do you have? - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 3; // in your case, there are 3 cells} 2. Return

The ios implementation program is switched to the background to implement background tasks. -(Void) applicationDidEnterBackground :( UIApplication *) application { // Use this method to release shared resources, save user data, invalidate timers,

Modify the font color of the status bar in iOS7 The font of the status bar is Black: UIStatusBarStyleDefault The font of the status bar is white: UIStatusBarStyleLightContent 1. In info. plist, set View controller-based status bar

Simple use of IOS Basic _ Block syntax I didn't have much access to block statements when I started learning IOS. I had to learn more and more block statements later. It was difficult to understand at the beginning, then I made an example and

Ios application, which is not automatically backed up to iCloud Original article, reprinted please indicate the source For ios projects, if you have built-in downloads or programs that dynamically generate files, pay attention to the downloaded or

(IOS) Small collection methods in development, ios development collection methods 1. color to image -(UIImage *) createImageWithColor :( UIColor *) color{CGRect rect = CGRectMake (0.0f, 0.0f, 1.0f, 1.0f );UIGraphicsBeginImageContext (rect. size );

Analysis of iOS development & quot; secret & quot; Page Effect of App content (2) @ I wrote a "secret" Cell effect article a few days ago, but there is still a gap with the desired effect at work, and the scalability is poor, so I rewrite the

Singleton mode for ios development, ios development In iOS development, the singleton mode is used in many places. In many cases, one object must be created and multiple objects cannot be created. To avoid creating multiple objects, use a single

IOS development-multi-thread programming 1. "power saving, smoothness, high-quality applications, fast response, good user experience ......" It may be the Apple system in the eyes of many users. 2. In the age when mobile phone manufacturers

IOS: learning notes, Swift operator Definition You can customize the Swift operator by adding a simple identifier. @ Infix: center operation. For example, +,-, *,/operation. @ Prefix: prefix. Example- @ Postfix post operation. a ++, -- @ Assignment

UILabel for iOS development UILabel is a commonly used component in iOS development and is mainly used to display content. UILabel is mainly used as follows: /* Size */ CGRect labelRect = CGRectMake (100,100, 80, 40 ); /* Initialize */

IOS_3 _ Image Browsing BeyondViewController. h //// BeyondViewController. h // 03 _ Image Browsing /// Created by beyond on 14-7-22. // Copyright (c) 2014 com. beyond. all rights reserved. // # import @ Interface BeyondViewController:

IOS_2 _ button controls Object Deformation BeyondViewController. h //// BeyondViewController. h // 02 _ button controls Object Deformation // Created by beyond on 14-7-21. // Copyright (c) 2014 com. beyond. all rights reserved. // # import @

Introduction to NSURLSession using IOS7 APIs Ios7 introduces nsurlsession, which supports new features related to network operations in the background: 1. upload and download in the background; 2. you can pause and resume network operations without

Status and notification of multithreading 3-NSThread in iOSIn OC, although there are not many actual scenarios for NSThread, if you can carefully understand the NSThread method when learning multithreading, it will be helpful to further study GCD