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Iphone long cannot recognize by QR code. iphone long cannot recognize Long-pressed QR codes on Android can be recognized (provided that your version supports this function), but it cannot be recognized by the Apple version. It was detected by a personal test that the scaling problem was: 1. Set the initial scaling to 1. The maximum scaling value must be greater than or equal to 1. scaling is not supported

step.The resolution displayed on the device screen may be lower than that shown in the previous step.Before the image can be displayed, it must be downsampled (resized) to lower pixel resolution.To display the previous image, you must re-sample (resize) at a lower pixel resolution ).Physical DevicePhysical Device Finally, computed pixels are displayed on the physical screen.Finally, the calculated pixels are displayed on the physical screen.The PPI number tells you how to adjust pixels fit into

[IPhone advanced] XMPP-based IOS chat client (IOS client 1), iPhone exmpp After introducing the server, we will focus on writing our own IOS client program. Let's take a look at what we have done First download the xmppframework framework. Click ZIP to download Next, use Xcode to create a project Drag the following files into the new project Add framework And set Now we have all set up. Run it

+originalframe.size.width #import "AppDelegate.h" #import "AssistiveTouch.h" @interface appdelegate () { //hover box Assistivetouch * _WIN;} @end @implementation appdelegate//Set custom hover box coordinates-(void) setnew{ _win = [[Assistivetouch alloc] initWithFrame: CGRectMake (0, 0, 60, 60)];} -(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions { Override point for customization after application launch. This sentence

1, please update the latest version of itunes, and then redo the recovery operation. This may be due to a corrupted or low version of the itunes file. This situation is directly to the official website to download the latest itunes reinstall can be. 2, choose to enter the DFU recovery mode to restore. Brief operation Essentials: Will the iphone shuts down, then simultaneously presses the switch machine key and the home key, sees the white App

In the iphone has a special power-on password setting option, the default state is off, that is not encrypted, the following step-by-step teaching you to complete the password settings: 1th Step, open the iphone and find the "Settings" icon, bash into: 2nd step, in the "Settings" option, find the "general" sub-item icon, click to enter; The 3rd step, find the "Password lock" option, the default state

Apple phone default is not directly at the same time multiple micro-mail, we first installed in the computer with a quick apple helper ! The installation was successful. We open the "Apple Helper" on our computer and then we connect the iphone to the computer. After confirming the connection, as shown in the following figure, search for "micro-letter" in the search box and click Install. After the confirmation of our Apple Assistant i

Use Shark to tune your iphone app for performance (using Shark to performance Tune Your iphone app)The beautiful Life of the Sun Vulcan (http://blog.csdn.net/opengl_es)This article follows "Attribution-non-commercial use-consistent" authoring public agreementReprint Please keep this sentence: Sun Vulcan's Beautiful Life-this blog focuses on Agile development and mobile and IoT device research: IOS, Android,

Iphone6plus screen Flashing Gray Bar This situation is believed that a lot of users have this problem, do not know how to solve, so let the small series for everyone to talk about the solution bar, want to know a look at it. Apple 6plus screen flashing ash bar solution IPhone6 this generation of products to the user caused a lot of trouble, at first when new equipment on the market, bending door so many users have to pay attention to equipment, and then a small number of iphone6p

Apps on IOS iphone 4inch do not have full screen, black borders on the upper and lower sides, and iphone 4inch I have been using the iPhone Retina (3.5-inch) simulator to test the IOS application. Everything is displayed normally, as shown in the following figure: In application development, I use pure code for implementation. The company provides an

The iphone 6 only went on the market for a few months, said Mr Wang, the director of research at ISuppli Corp., on Weibo, that the iphone 6 and iphone Plus will definitely be upgraded to 2GB in 2015, and the upgraded iphone must be the iphone 6s or

IPhone applicationsProject composition case implementation is the content to be introduced in this article, mainly to understand and learn how a project is made up. First, let's look at the details. DevelopmentIPhone applicationsFirst, it is not the source code, but the project file and directory. Let's take a look at its composition. IPhone application directory structure The

Find My iphone, from the name can know that this is a help you find a lost iphone program, previously just know, has not tried, today to look for time to test a bit, share the use of experience, hope to be helpful to everyone. Usage: 1. Install the Find Me iphone on your iphone a first. (Free to download from Apple S

Yesterday tried to put a long time before the iphone 3GS brush off the machine, the result of red snow brush, there is an infinite recovery mode. And in the recovery mode is not normal to enter the DFU, not normal brush machine, prompted 20 error. With red Snow, itools and iREB can not be kicked out of the recovery model, tangled dead me! But today I die as a live horse medicine, finally found a solution to share with you: Method is: With iREB (R6),

About 91 Assistants 91 Assistant is the most popular smartphone users of the Chinese application market, is the largest and most influential intelligent terminal management tool, but also the world's only cross-terminal, Cross-platform content distribution platform 91 helpers to customize ringtones for iphone The first step, we first install 91 mobile phone assistants in the computer, and then the phone6 mobile phone connected to the computer and t

Question: What about the iphone falling into the water? Answer: If the iphone is accidentally dropped in the water, you can immediately take the following methods to remedy: STEP1: First of all pay attention to do not turn on the power at this time, such as before is open, hurriedly shut down. STEP2: Then take off all the covers, such as the iphone phone cover

Set System Ringtones If you use a system ringtone we can: the iphone goes to "settings"-"sound"-"phone ring tone". Custom ringtone Making To be a music file for ringtones: You need to record the fragment time to be used as a ringtone. Convert music file formats with itunes iphone ringtones can only support the M4R format, and itunes can do this, this is mainly about using itunes music files for music f

a first responder, such as a mouse event or a keyboard event, which is the corresponding object. For example, in a multi-document program, the menu response events are generally connected to the FirstResponder, because the main interface is generally in another nib. At this time, FirstResponder is the FileOwner of your primary nib.Delegate object.Window. Window displayed when the application is started.After the application is started, you can customize your behavior as shown in the following f

The following is a summary of some problems when using h264 + AAC for video playback on iPad, iPhone, itouch, and other terminals. 1: audio and video synchronization problems The reason is mainly because of the TS file timestamp problem. Sometimes it will also cause problems after file encapsulation type conversion, For example, FLV-ts will cause audio and video to be not synchronized. The base time used by FLV (reference time): one second =

In iPhone development, we often need to perform animation switching between different pages, which looks better. There are three basic animations: 1. uiview Uiview provides five official animation effects for you: Uiviewanimationtransitionnone does not use the animation rotate from left to right to flip pages. The opposite is uiviewanimationtransitioncurlup, and uiviewanimationtransitioncurldown. Example: [Uiview beginanimations: @ "animat