Mobile Develop

Pixel Density proportional relationship---It usually takes five different sizes of icons to fit different screen resolutions, and the system can automatically create low-resolution icons based on the resolution's icon. Size | DPI | Multiples |--- |

Created in code:1, appdelegate the Contoller place controller next-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (nsdictionary *) launchOptions{ Self.window = [[UIWindow alloc] Initwithframe:[uiscreen mainscreen]

There are times when you don't need to add Lib libraries to compile, for example, when using Xposed's jar package, just build path-add to build Path in Eclipse, and if you add it as a Lib library, there will be an exception. The following is the

IB drag-and-drop controls are automatically declared as weak, while their own handwriting is strongIn iOS, objects are strongly referenced by default, and are not immediately released after a strong reference assignmentIB statement Weak not

Click Write.Change the default VESAMENU.C32 of Syslinux.cfg under the Syslinux folder in the USB flash drive to # default VESAMENU.C32 to comment out this line.Insert the prepared USB stick into your grandfather's book.Grandpa chose to boot from the

Transition Animation--catransitionCatransition is a subclass of caanimation that is used to animate transitions and animate layers to move out of the screen and into the screen. iOS has less transition animations than Mac OS xUinavigationcontroller

Remember to add mobilecoreservices.frameworkand import #import @interface ppviewcontroller () , Uinavigationcontrollerdelegate, Uiimagepickercontrollerdelegate> {Uiimagepickercontroller *_pickercontroller;}@property (Weak, nonatomic) iboutlet

An article I've seen beforeThe use of CollectionView has been summed up very well: "IOS6 new features: Uicollectionview Introduction"Water layout in the current application is very common, the simple study of the next, to achieve the following

Bundle Class: Vertical screen of activity to the activity of the horizontal screen, will be the activity of vertical screen to kill the activity of the horizontal screen to create, vertical screen activity will have some calculation results, can be

1. Menu.first is described in reference as: first value for group and item identifier integers. We can understand the minimum value set for the ID.2, Setdefaultkeymode (int mode) is used to set the activity of the default button mode,　This is the

1. Apply a jump -  (ibaction) openwangyi {        // 1. Get Application Object     UIApplication *app = [UIApplication sharedApplication];     // 2. Create an application that needs to be opened url    //  in the application jump,  as long as there

Through recent research flex writing Android, iOS application, we encountered a problem loading page, we use the Flex SDK 12,air 15-like Android ListView paging module. So, my colleagues and I wrote one, the effect is still able, drag the refresh,

Nsdictionary to jsonstring [self datatojsonstring:dic]-(nsstring*) dictojsonstring: (ID) object{ NSString * jsonstring = nil; Nserror *error; NSData *jsondata = [nsjsonserialization datawithjsonobject:object

Google announced the release of the Android 6.0 system, dubbed "Marshmallow" on its Nexus device, which is expected to be applied on more devices.The SDK for the new marshmallow system introduces some new features to developers, such as:Extended run-

Regular expressions (regular expression) are an object that describes the character pattern. Use regular expressions to perform powerful pattern matching and text retrieval and replacement functions. ID card Regular://identity card Regular

Consistent style, first look, then realizeWrite the custom properties file Atts.xml, the properties involved in the custom attribute have the left and right sides of the button's background, the contents of the middle title, font size, font colorXML

Recently busy to look at the Android network aspects of things. Google in 2013 released a framework called Volley network request, I looked at the official website, incredibly in the training inside there is a tutorial. First of all, the English

Mainactivity.java packagecom.sxt.day04_07_twoaction;Importandroid.os.Bundle;Importandroid.app.Activity;Importandroid.content.Intent;Importandroid.view.Menu;Importandroid.view.View;Importandroid.view.View.OnClickListener; public

setting the same action and category Android desktop as the desktop is also an activity, the action and category of the Android desktop Is:activity Android:name = "com.sxt.day04_07_twoaction." Mainactivity " android:label=" @string/app_name ">

There are two ways to manipulate Excel in the mainstream, one is through the poi package, and the other through the JXL package. Here I mainly explain through the JXL package to read and write Excel. first, you need to import a Jxl.jar package. :