IOS

There are times when you need to process strings. Now let's summarize the process of deleting special characters from a string . 1.stringByTrimmingCharactersInSet This method can only handle the special characters in the two parts before and after

Original: Http://blog.zachwaugh.com/post/309927273/programmatically-retrieving-ip-address-of-iphone For my app, Quickpic, I needed to show the user IP address of the their iPhone so they could type in the URL to the browse R. The IPhone SDK provided

Use the command line to download the installation package from the official website and install it manually from the git Pull substitution code . Open git Bash command-line tool, execute command ssh-keygen-t rsa-c email-addresss generate a key pair.

My cargo 876 is this to change the success, because it is in the dare to eat the basis of the change of La La (My practice is to follow the steps below to change the name of the project successfully, directly modify the Xcode home page bundle

Delegate is a very common design pattern in iOS systems and is used in many places. Before the beginning of contact with OC, for this delegate mode is very not understand, do not know what this so-called delegate is used for. However, after a few

Original address: iOS variable parameter (va_list,va_start,va_end) For example: The Otherbuttontitles in Uialertview's Init method: (NSString *) Otherbuttontitles, ... and more variable parameters. The way that iOS implements multiple parameters

Before you read through the article, you may need to understand the basics of memory allocation. By default, the Blockis archived on the stack and may be recycled at any time, and can be kept in a heap by copy, which is equivalent to being strongly

In the beginning, I was very excited to see my first blog about DJI's SDK. Unfortunately, after I studied the SDK in depth, I found the following unforgivable restrictions: 1 Not enough GPs can not use the ground station and flight control

For iOS project development, a clear, reasonable, easy to maintain project structure directory for the development of multiple people collaboration is also a very important thing (note: Be sure to make Xcode's engineering directory and the actual

1. Create a new project, drag out two ImageView and two button, and associate the code separately Join in 2.button action -(Ibaction) Save: (ID) Sender { Nsarray *paths = Nssearchpathfordirectoriesindomains (Nsdocumentdirectory,nsuserdomainmask,

Recording and playback in the development process there are a number of problems, the main problem is three: detect whether there is a sound input device when there are multiple sound output devices, the specified sound output device detects the

first, KVC and Kvo * "KVC": Key value Coding (key code) * Objective: To indirectly modify or get the properties of the object, reducing the coupling between the program (class and Class). * "KVO": Key value Observer (observed by the keys), observer

-(ID) fetchssidinfo { NSString *currentssid = @ ""; Cfarrayref myarray = Cncopysupportedinterfaces (); if (myarray!= nil) { nsdictionary* mydict = (__bridge nsdictionary *) Cncopycurrentnetworkinfo ( Cfarraygetvalueatindex

There are several problems in getting mobile phone usage traffic:①ios is unable to monitor the boot and shutdown broadcasts like Android, immediately shuts down and then turns on, and the traffic on the monitored mobile network is emptied by default.

iOS Development 71-troubleshooting could not find Developer Disk image problem when debugging When you use Xcode for true machine debugging, the pop-up dialog box "could not find Developer Disk Image" This is because the real machine system is

ArcGIS runtime SDK for iOS v2.2.1 was released. This version mainly fixes SDK installer in v2.2. In v2.2, installProgramCopies unnecessary files related to ArcGIS Project template for xcode. These templates are canceled in V2.1. Generally, copying

timer = [NSTimer scheduledTimerWithTimeInterval:1.0 target:self selector:@selector(timerFireMethod:) userInfo:nil repeats:YES]; // Countdown method: the verification code is countdown to 60 seconds. After 60 seconds, the button changes and starts to

ArcGIS API for iOS implements layer Display Control in two granularities: Service display control and layer display control. 1) Service Display ControlThe service display control is implemented using agsmapview class. Each uiviewcontroller interface

IOS font size, font size problem UIFont2011-06-29 Uifont ParametersFontsizeThe size (in points) to which the font is scaled. This value must be greater than 0.0. The actual fontsize parameter is pointsize, which is a pixel. The font size on Windows

Http://iphonedevelopment.blogspot.com/2011/03/attributed-strings-in-ios.html   A decade ago, Apple released iPad and ios3.2. IOS developers can finally use nsattributedstring and nsmutableattributedstring. These two objects can save the strings and