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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

pixelsPhysical PixelThe device screen may have lower pixel resolution than the image rendered in previous 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 cal

[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

].bounds.size.width; CGFloat height = [UIScreen mainscreen].bounds.size.height; CGRect originalframe = self.frame; if (originalframe.origin.x >= 0 originalframe.origin.x+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) Applicati

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

Reprint: http://blog.sina.com.cn/s/blog_7b9d64af0101bu9j.htmlMany times, we need to get the user's iphone version number, or the app's current version number. Care about the following two aspects: first, the application logic will be based on the iphone hardware version number to deal with the corresponding! Second, we need to get the current version of our app because of some kind of demand.first, obtain t

Full version of RadioStream application source code (iphone and ipad), iphone and ipad IntroductionRadioStreamis full native application for iPad and iPhone. This application streaminternet radio music.Packagecontains two projects: one for iPad and one for iPhone, so you can release HDversion for iPad and regu

IPhone 4S is connected to a computer and cannot recognize iPhone devices: Apple mobile device USB driver Driver Installation failure shows yellow exclamation mark Solution Apple mobile device USB driver Driver Installation failure shows a yellow exclamation point, cannot charge, let alone iTunes. The correct solution is: 1. Uninstall the iTunes software installed on your computer, and then Uninstall "A

What are the new features of iOS11? Does the old iPhone really slow down? ios11 new features iphone 1. [iOS 11] Introduction to the top ten practical new functions of iOS 11 2. [iOS 11] iPhone QR code scanning can be completed through built-in cameras! 3. built-in screen recording function for iOS 11! You no longer need to use a third-party application to scre

Use a built-in browser to click the drop-down box and the page jumps to the iphone. What should I do? Jump to the iphone Read more: how to pay for H5 pages with built-in browsers Scenario reproduction: While happily packing up and preparing for work, the girl in the test department ran to raise a bug: "under the iphone, click the drop-down box and the page jumps

Why do you require android to be smoother than iphone ?!, Why Android iPhone? I saw an article titled why Android phones are not as smooth as iPhone phones? There are many reasons for this: the android multi-thread operation continues to run even if it is removed to the background; android uses java (in fact, android uses a custom virtual machine ), ios uses obje

When developing an iPhone program, the first thing that comes into use is not the source code, but the project files and directories. Let's take a look at its composition. IPhone application directory structureIPhone applications are placed in a secure structure called sandbox. The program can only access resources in its own sandbox. IPhone applications and Mac

It's time for a super contest! This time it was disappointing that there was no iPhone 5, but there were a lot of improvements in the iPhone 4S itself alone. Let's continue reading, look at the end of the iPhone 4S compared to the iPhone 4 what has changed!

File's Owner object is actually an instance of UIApplication.First Responder object. Each program has 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

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

1) on the Apple 6 mobile phone, click the "Settings" icon on the desktop, as shown in the following figure.2) then you can see a "sound" option in the "Settings" that you open, as shown in the following figure. (As shown in the following figure)3) click "sound" and enter the corresponding ringtone mode. For example, select the "Ringtone" option. (As shown in the following figure)4) Now we can change the vibration mode when the "Ringtone"

Step 1: Connect your iPhone to your computer and enable iTunes on your computer.Step 2: Click the device in itunes, and then click the video (music) icon and click "file menu"-"add file to database", as shown in the figure.Music:Step 3: Now our impact will be displayed in itunes.Step 4: Click "file-add file to database", or add the entire audio/video folder to the database, and then select the file or folder to be added o