"Learning the path of iOS: Objective-c" The system ordering method commonly used in OC

Common sorting methods in ①.oc:1). Non-variable group-(Nsarray *) Sortedarrayusingselector: (SEL) comparator;-(Nsarray *) Sortedarrayusingcomparator: (NSComparator) cmptr;2) Variable Group-(void) Sortusingselector: (SEL) comparator;-(void)

Optimization of-ios program performance in Layman's

iOS app is very focused on user experience, not only requires the interface design is reasonable and beautiful, but also requires a variety of UI responsiveness, I believe we are the kind of a drag on Kaka TableView application is not a good

Android Sqliteopenhelper instance Privatecontactsdbhelper

Packageprivatecontact;Importandroid.content.ContentValues;ImportAndroid.content.Context;ImportAndroid.database.Cursor;Importandroid.database.sqlite.SQLiteDatabase;ImportAndroid.database.sqlite.SQLiteOpenHelper; Public

"Keep updating" the recommended third-party open Source library for Android projects, pull-up dropdown, sidebar, database, multithreading, Json, animations, and more.

1. Use pull-up more, drop-down refresh: https://github.com/JosephPeng/XListView-AndroidThis is more popular on GitHub: Https://github.com/chrisbanes/Android-PullToRefresh2. Side-slip menu:slidingmenu.rar(Import support-4v package yourself)3.

Android ScrollView with Viewpager swipe up and down left and right conflict

Rewrite ScrollViewpublic class Customscrollview extends ScrollView {Private Gesturedetector Mgesturedetector;View.ontouchlistener Mgesturelistener;Public Customscrollview (context context, AttributeSet Attrs) {Super (context, attrs);Mgesturedetector

STRUTS2 Error: There is no Action mapped for namespace ... Workaround

This problem occurs today when using Struts2.1 for annotation operations. It took a half a day to solve, the cause of the mistake is really make people egg ache!error message:Project Structure:Where to use annotations:Package Com.service;import Java.

"Learning iOS Path: object-c error" Collection <__NSArrayM:0xb550c30> was mutated while being enumerated.

Error message:Cause of Error:Crashes when the program performs a traversal and modifies the contents of the array at the same time.Here's how to fix it:Method 1: define an identical array, iterate over the new array, and modify the original

iOS navigation page

//APPDELEGATE.M#import "AppDelegate.h"#import "ViewController.h"@interface appdelegate()@end@implementationappdelegate-(BOOL) Application: (UIApplication *) application didfinishlaunchingwithoptions: (Nsdictionary *) launchOptions {CGRect rect =

[Android algorithm] bitmap compress a picture to a specified size

Bitmap compressed to a specified size:private void Imagezoom () {Picture allows maximum space unit: KBDouble maxSize = 400.00;Put bitmap in the array, intended to bitmap size (larger than the actual file being read)Bytearrayoutputstream BAOs = new

About recording under iOS

http://blog.csdn.net/silencetq/article/details/8447400I'm using the Avaudiorecorder framework to do the recording.This recording is somewhat different from the Speakhere on the official website, the biggest difference is that this must be recorded

Configuration after the Android development environment Reload system

Premise:Pre-configured Android development environment, reload system, compress Android directoryConfiguration:Installing the Java EnvironmentInstallationBuild java_home variable ; javahome add to Path variableJava_home=c:\program files\java\jdk1.8.0

iOS frequently opens album crashes: alassetslibrary Error-"Too many contexts. No space in Contextlist. "

iOS frequently opens album crashes: alassetslibrary Error-"Too many contexts. No space in Contextlist. "http://stackoverflow.com/questions/13480611/ Has-anyone-experienced-crashes-when-using-alassetslibrary-in-a-background-threadReason:Because of

Android font settings, Roboto font use

One, custom fonts1.android typeface setting fonts using TTF font filesWe can put the TTF font file in the program and use typeface to set the font in the program.The first step is to create a new fonts directory under the assets directory and place

Android font settings, Roboto font use

One, custom fonts1.android typeface setting fonts using TTF font filesWe can put the TTF font file in the program and use typeface to set the font in the program.The first step is to create a new fonts directory under the assets directory and place

Android Sliding Door effect (Scroller)

The following is the use of scroller to show you the effect of sliding doorsIdeas:1. Customize a class Pushpulldoorview, inherit relativelayout,2. Initialize the Scroller object and have a bouncing effect. The display is smoother when you move the

Android Direction sensor (Sensor_type_orientation)

Sensor_type_orientation This Android 2.2 is not recommended!!! Phone status Numeric status Range of values The phone is placed horizontally, the top point is North Square The x, y, and z direction values are 0

Android_listactivity Use note

Listactivity  Listactivity is an activity class that specifically displays the ListView, which contains a ListView object that is automatically displayed as soon as we set up the data source.Using custom view for screen layoutAlthough Listactivity

In-depth understanding of Android (2)-Understanding JNI in Android (medium)

Sunshine Xiao Qiang took part in the CSDN blog star, if you think Sun Qiang's blog to help you, for Xiao Qiang vote: http://vote.blog.csdn.net/blogstar2014/details?username=lxq_xsyu#contentIn the previous article we learned about the use of JNI in

Android Traffic statistics

Researched Android traffic stats for a whileSend a summary of their own posts1 Android has a trafficstats class that can be directly obtainedTotal accepted Traffic trafficstats.gettotalrxbytes (),Total send Traffic trafficstats.gettotaltxbytes

IOS8 post-update location problem cllcationmanage

The previous method cllocationmanagerdelegate not call didupdatelocations after the IOS8 updateIOS8 modified the content in the location settings, added a set of States (available in use/usually available), so after the registration of the previous

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