IOS

First, you have to listen to the keyboard events, the two most basic events: Uikeyboardwillshownotification Uikeyboardwillhidenotification Uikeyboard... Some new iOS 5 Uikeyboarddidchangeframenotification (will) Generally, the first two

IOS audio playback Sound support is essential in the development of iPhone applications or games. Each of the several applications I have done involves sound effects, so here is a simple induction, many of them refer to the iPhone application

1. A simple method for saving images Nsdata * imagedata = uiimagejpegrepresentation (image, 1.0 ); [Nsdata writetofile: ImagePath atomically: Yes];Save it and read it again at startup. Uiimage * _ image = [[uiimage alloc] initwithcontentsoffile:

I entered "iOS hidden keyboard" in Baidu and quickly found many articles. For example, "click return to hide", "click other places in the input box to hide", and so on. In fact, hiding the input method is also simple. We should grasp its essence:

MVC in IOS Let's talk about the Model-View-controller (MVC) model in cocoa programming today. We will discuss MVC in two aspects: What is MVC? What is the communication between M, V, and C? Understanding the concept of MVC is crucial to cocoa

[IOS] Question about URL encoding in IOS The stringbyaddingpercentescapesusingencoding of nsstring can encode the URL parameter, but it is a small problem and will not encode all characters to be encoded. We can use the cfstringref The

A thread is one of multiple technologies that allow concurrent execution of Multiple Code paths in a single application. Although newer technologies such as operation objects and Grand Central Dispatch (GCD) provide a more modern and efficient

Set When developing applications, you will use IOS software development kit (SDK) and xcode, that is, Apple's integrated development environment (IDE ). Xcode provides everything you need to develop the perfect iPhone, iPod Touch, and iPad

In IOS coredata, multi-table queries do not have SQL intuition, but coredata can still perform related operations. The following shows the relationship between tables in a relational database using coredata. The relationship between the generation

This lesson focuses on the principles of final projects and persistence. Persistence Persistence means that it still exists when you exit the app. Nsuserdefaults is a very simple persistence solution, but there are restrictions, it can only be small

From: http://www.2cto.com/kf/201109/105621.html  Since ios5 xcode4.2 introduces arc (automicreferencecounting), there are some minor changes when xcode4.2 is used to create a project. NSAID utoreleasepool@ {Autoreleasepool// Code for

Https://github.com/nst/iOS-Runtime-Headers Private framework has two scenarios, 1. The framework has been loaded, but the header file has not been exported. In this case, you only need to add the header file to the project and call it directly. As

A: Resource lock #import @interface WPGlobalTest : GHTestCase{ int _count; NSLock *_lock;}@end -(void)test3{ if (_lock == nil) { _lock = [[NSLock alloc] init]; } NSThread *t1 = [[[NSThread alloc]

Socket usage Part 1: Concepts 1. What is socket? Socket, also known as "socket", is a method provided by the system for network communication. In essence, it is not a protocol. It does not specify how a computer should transmit messages. It only

Https://github.com/jdg/MBProgressHUD Mbprogresshud works on any IOS version and is compatible with both arc and non-arc Projects Usage The main guideline you need to follow when dealing with mbprogresshud while running long-running tasks is

In a sense, most IOS applications need to communicate with remote Web servers in some way. I will briefly introduce the following XML and JSON parsing for your reference only. please correct me if any errors exist. Thank you. XML Parsing 1. The SAX

Device Screen Size Pixels FAQs IPhone 3gs 3.5 ″ 320 × 480 IPhone idioms for non-Retina Display No Gyroscope No front camera IPhone 4 3.5 ″ 640 × 960 Only single-core

Problem description:Use an nstimer to refresh regularly, and the refreshing effect stops when uiscrollview is scratched.Solution:-(Void) settimer{Nstmer * timer;Nsdate * Date = [nsdate date];Timer = [[nstimer alloc] initwithfiredate: Date interval:

An important feature of objecitve-C is runtime. in interacting with the runtime (Interactive Operation), Apple provides/usr/lib/libobjc. a. dylib library, which provides objective support for dynamic attributes-C language: the interface can be used

StatementYou are welcome to repost this article, but please respect the author's Labor achievements. repost this article and keep the statement in this box. Thank you.Article Source: http://blog.csdn.net/iukey Uidatepicker is a controller