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iOS dev > Learn-how to draw 1-pixel lines correctly

Cgcontextmovetopoint (context, XPos, 0); Cgcontextaddlinetopoint (context, XPos, self.bounds.size.height); XPos + = Linemargin; } while (YPos Cgcontextmovetopoint (context, 0, YPos); Cgcontextaddlinetopoint (context, self.bounds.size.width, YPos); YPos + = Linemargin; } Cgcontextsetlinewidth (context, self.gridlinewidth); Cgcontextsetstrokecolorwithcolor (context, self.gridColor.CGColor); Cgcontextstrokepath (context); } @end Here's how to use it: S

iOS Dev Uinavigation Series three--toolbar Uitoolbar

iOS Dev Uinavigation Series three--toolbar UitoolbarIn addition to Uinavinationbar in iOS, there is also a toolbar uitoolbar for us to use, the toolbar and navigation bar is very similar, but the function is more simple, there are uibarbuttonitem buttons in the toolbar, in the first two blogs, A discussion of navigation bars and navigation items, with the followi

Also say interview-an effort of iOS Dev

You go home in the golden glow, and I sneak in the silver tenderness--this is my status quo.This year's recruitment form is not very good, hard to find jobs, but also difficult to recruit. This blog is written to give you some references to iOS dev for work.Last article: Change the Pit (to interview)Another year to change the pit of the season, for various reasons, I changed the pit.This year has 6, 5 offer

iOS dev UIWebView and JavaScript (JS) callback interaction

= ' Www.XXX. Xxx.zip ';d ownload (URL);//Call the iphone to provide the JS interface Adddownloadtask_ret ();//Get the download results from the iphone download interface, here is a local delay method}// Get iphone Download interface execution download results Functionadddownloadtask_ret () {varobj=getdownloadtaskresult ();//Here is an interface for the iphone, Responsible for returning the results of the current download execution if ('!=obj| | Undefined!=obj) {//Invoke some of the local post-pr

"iOS Dev-25" Uidevice View system Information, start with a question how to quickly find the properties and methods you want and understand it

, such as 8.0 NSLog (@ "%@", [[Uidevice currentdevice]systemversion]); Get system name such as iphone OS NSLog (@ "%@", [[Uidevice currentdevice]systemname]); Get the device name, who belongs to the device, namely the registered Apple account, the analog is the iphone Simulator NSLog (@ "%@", [[Uidevice currentdevice]name]); Device models, such as iphone or ipad, are the analog iphone Simulator NSLog (@ "%@", [[Uidevice Currentdevice]model]); can also get battery usage, b

iOS Dev-store use preferences preference storage

① many iOS apps support preferences such as saving usernames, passwords, font size, and more, iOS offers a standard set of solutions to add preferences to your app② Each app has a Nsuserdefaults instance that accesses preferences③ For example, save user name, font size, automatic loginSave method-(Ibaction) Save {//1With Nsuserdefaults, you have direct access to the software's preferences (library/preferenc

9 seconds College teaches you how to become an iOS dev talent

This course focuses on iOS platform mobile app development and game development, mainly on C++,js,lua,python and other game programming languages, iOS platform core technology, Cocos2d-x engine, Crossapp engine, Firefly engine technology, mainly divided into 8 parts:The first part: The basic stage of languagePart Two: iOS Core technology SectionPart III:

"iOS Dev-backgrounds" about button background picture stretching

About the effect of the button background picture stretching and not stretchingeffect of stretching:the effect of not stretchingeffect of stretching:the effect of not stretchingTensile principleIn iOS development, there is a way to stretch a picture in the form specified, stretching in a general stretch of 0:Implementation method Create a new category for a uiimage Expand a method for UIImage + (UIImage ) Resizableimage: (NSString ) image

UIView example of "iOS Dev-touch" move

iOS touchMethod://Start contact-(void)Touchesbegan:(nsset *) touches withevent:(uievent *) event;-//move on the screen -(void)touchesmoved:(nsset *) touches withevent:(uievent *) event;-//Touch End -(void)touchesended:(nsset *) touches withevent:(uievent *) event;-//Cancel Touch -(void)touchescancelled:(nsset *) touches withevent:(uievent *) event;Implement the UIView movement-(void) Touchesbegan: (Nsset *) touches withevent: (Uievent *) event {}-(voi

"iOS dev" "oc"00-write in front

development of OC, IOS, MAC program necessary framework, if you want to use the entire framework of content, including the framework of the main header file. The primary header file is the most important header file in a framework, with the main header filename and frame name consistent for each frame.namely: #import Run the following procedure:    (1) Write the OC source file. M. C(2) Compiling files cc-c xx.m xxx.c(3) Link cc xx.o xxx.o-framework F

iOS dev > Learning-Sandbox and file operations (rollup)

The article about sandbox and file operation wrote several, in the process of writing deepened their memories. Today to do a summary, is a sort of knowledge points.Article carding1 iOS development sandbox mechanism (sandbox)This is a basic knowledge of sandbox tutorials. The role of Sandbox is briefly described, and the differences between documents, Library and TMP are introduced. Open the sandbox in two ways to see what's in it.2

"iOS Dev-View"

Bnrhypnosisview objectsCGRect Screenrect =Self.window.bounds; CGRect Bigrect=Screenrect;//bigRect.size.height *=2.0;BigRect.size.width *=2.0; //Create a Uiscrollview object, set its size to the window sizeUiscrollview *scrollview =[[Uiscrollview alloc] initwithframe:screenrect]; [ScrollView Setpagingenabled:yes]; //Create a large size bnrhypnosisview (modify to create a wide view with screen etc.)Bnrhyponsisviewtwo *hyponsisview =[[Bnrhyponsisviewtwo alloc] initwithframe:screenrect];

"iOS Dev-63" Unknown type name "CGRect", Did you mean "Rect"? Solution

The children's shoes, almost all because of the Xcode6 of the problem.Cause: Before Xcode6, the file system created automatically imports the Foundation.h and UIKit.h files for the user, but the latest Xcode6 only imports the Foundation.h file for the user, missing one.So, the solution is: You can import it in the header file section:#import This problem, Google a bit, found a lot.Reference: Http://stackoverflow.com/questions/26169273/cgrect-unrecognized-in-subclasses-of-nsobject"

"iOS Dev-55" picture Carousel Case: ScrollView pagination, scroll bar, leverage Agent control timer and page control and multithreading issues

) This involves a multi-threaded knowledge.Generally we value for single-threaded, that is, the system can only handle one event at a time, such as our picture carousel here, if the user on the page to drag other things, such as our textview here, then the system will focus on this event, no time to take into account our picture carousel, so the picture carousel will not move.We are going to introduce the time Nsrunloop this class. What is it? In fact, read a lot of other people's notes, everyon

"iOS Dev-54" Case study: Practice the implementation of proxy mode with Uiscrollview zoom picture function

Case: (Hold down the option key in the simulator and the zoom gesture will appear when you click the mouse)(1) in VIEWCONTROLLER.M:--scaling things is a uiscrollview other than scrolling, so things that need to be scaled should be placed first in Uiscrollview, such as the imageview here;-While we are zooming, scrollview ourselves do not know which control we want to scale, so scrollview need a proxy to tell it, this agent is generally our controller;--and the controller must obey its protocol to

"iOS Dev-74" solution: Save data under Xcode6 with preference, where is the final plist file?

(1) Phenomenon: In general, the storage of data in a sandbox as a unit, preference data exists in the sandbox path library/preferences inside, but Xcode6 find to find there is nothing at all.(2) Reason: Xcode6 and Xcode5 and before, there is an adjustment on the emulator folder path.(3) Xcode6 's preference file is unified in a folder called Preferences, which has a lot of plist files in preference settings.The path to this file is/users/your user name/library/developer/coresimulator/devices/sim

3 ways to create a controller with iOS Dev-73, in-depth understanding of the creation and loading order of the view

, according to the name of storyboard to load the inside view.3, if there is no storyboard, then load the xib inside the view. The order at this point is:3.1. If the name of the xib is specified, the view inside the response is loaded;3.2, if the name is not specified, then the controller name prefix is loaded with the same xib view, such as the controller name is Wpviewcontroller, then the first load is called Wpview xib file in the view.3.2. Second, if there is no Xib file called Wpview, load

"iOS Dev-81" Setneedsdisplay refresh graphics and Cadisplaylink to simulate timer effects

(1) Effect(2) Source code download (if prompted no small picture, you can find a replacement, see the effect on the line)http://download.csdn.net/detail/wsb200514/8176339(3) Summary:--Because the DrawRect method calls only 1 times, if you need to refresh the drawing, you need to force the call to refresh with Setneedsdisplay.--Learn the use of another "timer", the following two kinds of similar-(void) awakefromnib{ cadisplaylink *link=[cadisplaylink displaylinkwithtarget:self selector: @selec

"iOS Dev-71" solution: attempting to badge the application icon but haven ' t received permission from the ...

, with the IF statement, to obtain the system version, the conversion of nsstring to float can be compared, these are no problem.In the end, the core is three words in the IF. In general, we define a "notification settings", and then register the "notification settings" in the "User notification Settings", and registered to the "User notification Settings" in the "Notification settings", are used in the box to let users decide whether to accept this notice.-This "notification setting" is primari

"iOS Dev-114" Abaddressbook Address Book: Simple Introduction to additions and deletions, cf frame conversion between f frames

(1) After importing the Abaddressbook library, and then adding the header file, you can use it.-Because this library method is basically the C language style, so the class is basically a CF beginning, such as Cfstringref and Cfarrayref, it and OC NSString and Nsarray similar, can be converted to each other, using __bridge to cast, such as (__ Bridge NSString *) XXX, you can convert the original cfstringref xxx to nsstring type, the advantage is that there is no need to release operations in many

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