IOS

Uilabel * label = [[uilabel alloc] initwithframe: cgrectmake (0, 0, 0)]; //ThisFrameIt is the initial one. It doesn't matter. It will be reset later.Size.[Label setnumberoflines: 0];Nsstring * s = @ "abcdefghijklmn ";Uifont * font = [uifont

1.Why do we need to set the value to nil after a variable is release? After a variable is release, the memory to which the variable points is released, but the variable itself remains unchanged and still points to the original memory address. If

Uiview * view = [[uicontrol alloc] initwithframe: cgrectmake (50,200,150,150)]; View. backgroundcolor = [uicolor clearcolor]; [(Uicontrol *) view addtarget: Self action: @ selector (XXX) forcontrolevents: uicontroleventtouchupinside];

IOS open-source projects and frameworks that have been used during iOS development and learning. IOS open-source framework: 1,Core plotOpen SourceFramework: A graphical framework under the iPhone for drawing graphics and tables. 2. prettykit: A

-(Bool) textfieldshouldreturn :( uitextfield *) textfield {// when the user presses return, take focus away from the text field so that the keyboard is dismissed. nstimeinterval animationduration = 0.30f; [uiview Duration: @ "resizeforkeyboard"

InControl eventBriefly explain the following events. Note: because it was tested in the "iOS Simulator", you can only use the mouse instead of your fingers. 1) uicontroleventtouchdown Left mouse buttonPress(Note: Only "Press") Action 2)

1. You do not need to write three keywords: retain, release, and autorelease; 2. An object will not be destroyed as long as it is pointed by the strong pointer until all the strong pointers pointing to it point to other places; 3. By default, all

Today, you just need to add a view with rounded corners. I searched online. Find the following two methods. 1. Set directly (tested) The header file must be imported first.   # Import ... Bgview. layer. cornerradius = cornerradiusinpixels; Bgview.

Pie Chart: https://github.com/honcheng/iOSPlot Pie Chart: https://github.com/tylerneylon/moriarty Bar Chart: http://www.devdiv.com/iOS_iPhone-%E5%88%86%E4%BA% AB %E4%B8%80%E4%B8%AA%E5%88% AB %E4%BA%BA%E7%9A%84%E6%9F%B1%E5%9B%BE-thread-70067-1-1.html

Self. _ textfield. returnkeytype = uireturnkeydone; Self. _ textfield. Delegate = self; -(Bool) textfieldshouldreturn :( uitextfield *) textfield { [Textfield resignfirstresponder]; Return yes; } Self. _ textview. Delegate = self; Self. _ textview.

IPhoneOfUitableviewCode for pagination Uitableview can display a lot of content in the list, which is also a common component in our development. We usually display the list by page, for example, display 10 first.Click more to add 10 records, and

Follow these steps: 1. Create a cocoa touch static library (this won't happen, I believe everyone will) 2. Delete the target 3. Select File-new-target from the xcode menu, and then select Note: No Bundel exists in the options of the IOS project,

To play and record audio on iOS devices, we recommend that you use the avaudioplayer and avaudiorecorder classes in the avfoundation framework. Although its usage is relatively simple, streaming is not supported. This means that before playing the

1 PrefaceThe datawithjsonobject: Options: Error: Method of the nsjsonserialization class is used for implementation. array and dictionary are serialized into JSON objects. It facilitates transmission over the network. 2. code exampleTestdemo.

Cmdn club 15th was successfully held on April 9, March 15. This activity focused on the development of voice technology with the topic "Application and Practice of mobile platform speech technology, this article explores hot topics of speech product

// Define the operation when the dial button is clicked [CPP]View Plaincopy -(Void) callaction { Nsstring * number = @ ""; // enter the phone number here // Nsstring * num = [[nsstring alloc] initwithformat: @ "Tel: // % @", number]; // number

1. Create an application First go to iTunes connect and then press manage your applications Next, click Add new application to create an application.2. Create an IAP in the Application After the application is created, click the application icon

Recently transferred to iOS development, I found that If IOS uitextfield is at the bottom of the screen, the keyboard cannot automatically adjust the interface layout, You need to manually adjust the location, therefore, I want to write a general

Step 1: In info. plist, add the "Required background Modes" key and the value is app plays audio.Step 2: -(Bool) Application :( uiapplication *) Application didfinishlaunchingwitexceptions :( nsdictionary *) launchoptions { Self. Window =

The location of symbolicatecrash in xcode 4.3 is different from that in earlier versions. /Applications/xcode. APP/contents/developer/platforms/iphoneos. Platform/developer/library/privateframeworks/dtdevicekit.