Xcode5之后创建项目,默认会自动开启ARC自动引用计数机制,但我们在实际应用开发中考虑到种种原因,有时候不得不关闭(开启)整个应用或部分类的ARC。The steps are:Apple LLVM 6.0-language-objective C, objective-c Automatic Reference counting set N, Project-Build settings O To turn off the entire arc, set Yes to on.Sometimes when we introduce a third-party class library, because the third-party class library does not support arc, you need to close the arc of the class library sepa
Knowledge Point Analysis:
Touch the keyboard can by touch typing on the screen, Win8.1 is WIN8 upgrade version, some features are different, and then describes how to turn off or open the touch of the keyboard sound.
Operation Steps:
1. Mouse to move to the upper right corner of the screen, select "Settings";
2. In the Open interface, select "Change computer Settings";
3. After opening th
Specifically as follows
Turn off automatic screen rotation
1. Quickly press the home key two times, which is the front of the phone button.
2. That will appear as shown in the image of the interface, click on the lower left button, several operating the iphone's automatic rotation function,
Turn on automatic screen rotation
1. Down the ho
This example: neo4j-enterprise-2.3.1 versionneo4j default installation is to turn on access password authenticationYou can find that the Neo4j-server.properties configuration file under conf/# Require (or disable the requirement of) auth to access neo4jdbms.security.auth_enabled=trueTrue: Security authentication is enabled on behalf of AccessTo false means that the data is accessed without seriousOpen the following webserver for external IP and port a
Enter the QQ Game Hall Sound, then we click on the game set up, set up in the game table after sitting, "set" and then in the pop-up Settings screen, we click on the "background music and sound effects, etc." option to uncheck all.
As shown below we go to the table and sit down, select the "Settings" option, and then click Open to enter
Then in the "Basic settings" to enter the "Play background music" and "Play sound" and other sound-related options before the check out, click
Method one or one key mute
1, on the left of all Apple phone has a "mute button", click it we can achieve "turn on or off the system sound"
2, if we want to mute as long as the button down on it, so the screen will have a "mute"
3, the next photo, to ensure that add absolutely no sound.
Method two, Plug headphones
1, plug in Headphones This method is the other people can not hear the sound, but y
On some pages, users need to prompt the user before exiting whether the content of the current page has been saved to prevent data loss!We can do this with the onbeforeunload event.Trigger the "onbeforeunload" event when you close the window or press F5 Definition and UsageThe onbeforeunload event is triggered when it is about to leave the current page (refresh or close).This event can be used to pop up a dialog box that prompts the user to continue browsing the page or leave the current page.Th
Failure phenomenon:
The plate rotates automatically when rotating, which affects use, and the following is the way to turn off the system's gravitational induction, which is to lock the screen.
Solution:
1, in the lower right corner of the desktop click on the new notice, open the Notification center, in the notification center can see the rotation lock button, the default is the gray state, that is
auto-commit feature to on and off. Set the auto-commit function to ON
SET autocommit=0;
Set the auto-commit feature to OFF
SET autocommit=1;
We will show what kind of changes will occur after the auto-submit feature is set to OFF. Set to OFF, we insert a piece of data into the table use
Turn on Automatic Updates to turn off CentOSTo turn off automatic centos updates, the operation is logged as follows:[Email protected] alpha]# chkconfig–list yum-updatesdYUM-UPDATESD 0: Off 1:
How does the Win7 system turn off or turn on the IE browser's hardware acceleration feature?
In IE browser, the GPU can be invoked to accelerate the optimization of web graphics through hardware acceleration, and hardware acceleration is a new feature that enables IE to move all graphics and text from the central Processing unit (CPU) to the graphics Processing
Tags: conf virt ble firewall open firewall art/etc relatedView, turn off, and turn on firewall commands under Linux1) Permanent, no recovery after rebootOpen: Chkconfig iptables onOFF: Chkconfig iptables off2) immediate effect, failure after rebootOpen: Service iptables startClose: Service iptables stopIt should be stated that for other services under Linux, the
To shut down or turn on Apache directory browsing for security or convenienceClose directory Browse Modify http.conf file Options Indexes followsymlinks change to options-indexes followsymlinks Close some information modify Serversignature Offservertokens Prod Instructions Servertokens Instructions Servertokens prod[uctonly] The server will send (for example): Server:apacheservertokens Major The server will send ( For example): Server:apache/2serverto
In iOS app development, there are three types of view objects that open the virtual keyboard for input, but how to turn off the virtual keyboard without providing an automated method. This needs our own realization. These three types of view objects are Uitextfield,uitextview and Uisearchbar, respectively. Here are a few ways to turn
Turn off the monitor
Copy Code code as follows:
@echo off
:: By SKB
Powercfg/change Home/Work desk/monitor-timeout-ac 1
Exit
The minimum parameter for REM is 1, which is 1 minutes, and if you don't move your computer for 1 minutes, you'll see the effect.
POWERCFG [/list |/query [name] |/create name |/delete name |
/setactive name |
Computer port Some of the use of skills believe that everyone may have a certain understanding, through the control of each port, you can effectively control the operation of a variety of computer programs, by closing the corresponding port, you can stop the operation of some computer programs.
Each service corresponds to the corresponding port, such as the well-known WWW service port is 80,smtp is 25,ftp is the 21,win2000 installation of the default are these services open. It is really not ne
When you use PHP for Web development, the entry needs to pay attention to some security configuration items, turn off some features, to prevent users inadvertently appear a variety of problems.
1. turn off the PHP prompt error feature
Change the display_errors to off in php
Set is a shell internal command to turn shell feature properties on or off, and if nothing is added, the user-defined variables and environment variables are displayed directlySyntax: Set [Options ...]Options:- F : Disable wildcard characters+f : Enable wildcard characters- u : If there are variables that are not set in the script, immediately let the script exit execution and display an error message+u : I
Users who have notebooks know that when they close a notebook, they go to sleep mode, while in the sleep mode the laptop network breaks its own net. This makes it troublesome for the card machine to reconnect to the network. So is there any way to deal with this problem? Let's take a look at the solution to the small arrangement!
There are two ways to use it:
One, the screen of the notebook by setting off the screen (no need for other settings to en
Word is a very good word processing software, its powerful word processing and table editing features to our work brings a lot of convenience, but word is always "unrequited". Enter a URL or email address in the document and automatically set it as a hyperlink; in the text entry process, some words appear in the bottom of the text inexplicably red or green wavy lines, prompt input statements exist spelling and grammatical errors. These "romantic" behavior is sometimes really make people laugh an
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