IOS

In the past few days, due to a problem with the local network, all webpages except Q and Weibo cannot be accessed. The blog has not followed up. I recovered today, so I continued to update my blog. I also hope you can continue to comment on it or

The author Sun Dongfeng 2011-1-12 reprinted, please indicate the source   Introduction How to manage multi-threaded access to shared data and prevent deadlocks between threads is a very important topic when it involves multi-threaded concurrent

Author: Sun Dongfeng)   In the actual programming process, some common functions are usually made into function libraries for use by other programs. One is to reuse the code, and the other is to keep the core technology confidential. Therefore, in

Based on the previous article, this article completed the user login wait function as shown in Figure 2. First, let's talk about the origin of this page function, this is to query the user records from the table when checking that there is already a

Usage reason: the data is single, small, and the code is concise. I. Position of NSUserDefaults Data Storage NSUserDefaults is used to save iPhone program data, which is very convenient to use.So where will the data be stored? Stored in a plist

  Reference: Http://blog.csdn.net/xiaoguan2008/article/details/6582699     Use [UIDevice currentDevice] to obtain the system information of the iphone. The information is as follows: [[UIDevice currentDevice] systemName]: system name, for example,

Java codeAndroid general method of getting Ip address edit documentCredits + 2Hello everyone, let's talk about some methods for Android to obtain Ip addresses. In our development, we have determined whether the mobile phone is connected to the

If you want to write a class to ensure that only one instance exists and you can get the entry for providing services for this specific instance, you can use the single-State design mode.The single-State mode is commonly used in Java and C ++. It

Let's analyze the Objective-C code that we first came into contact. (IBAction) myAction1 :( id) sender { Int kakaku = [[motone text] intValue]; Switch ([waribiki selectedSegmentIndex]) {Case 0:Kakaku = kakaku * (1.f-0.2f );Break;Case 1:Kakaku =

  I. UILabel (1) initialize UILabel   UILabel * scoreLabel = [[UILabel alloc] initWithFrame: CGRectMake (self. bounds. size. width/2), 0.0, 150.0, 43.0)];   ScoreLabel. textAlignment = UITextAlignmentCenter;   ScoreLabel. text = @ "I'm Andy --

Understanding about Connection   The development in iOS SDK is similar to the Dialog Based Application development in Windows. It is to drag some page elements to the window and then write the corresponding code. However, why is no Connection

This article describes how to obtain the html content of a webpage by running javascript: Obtain all html: NSString * lJs = @ "document.doc umentElement. innerHTML ";Obtain the webpage title: NSString * lJs2 = @ "document. title ";UIWebView *

1 PrefaceDue to work needs, it is necessary to start to smash the Baidu map. This morning, we started to take a nap at noon and made great efforts to prepare for the three hundred round of the afternoon war, fortunately, the Baidu map Demo was

I. Exception breakpoint descriptionWhen an exception is thrown due to a code problem, the exception breakpoint stops program execution, such as Foundation. some methods in framework, such as NSArray and NSDictionary, will throw an exception if they

Atomic and nonatomic are used to determine whether the getter and setter generated by the compiler are atomic operations. Atomic When setting the @ property attribute of a member variable, the default value is atomic, providing multi-thread security.

I have been trying to test IOS development for a long time. Due to the development environment restrictions, I have been confined to theories and virtual machines. Recently, I have started my MacBook Pro and I have come to try it. I have also

[Html]NSURL * url = [NSURL URLWithString: @ "xxx"];ASIFormDataRequest * request = [ASIFormDataRequest requestWithURL: url];Request. uploadProgressDelegate = viewPost. progressView;Request. showAccurateProgress = YES;Request.

1. the status bar generally has a height of 20 pixels. When you call a mobile phone or display a message, the status bar will be enlarged to 40 pixels. Note that the status bar with a height of two times can only be used in portrait mode. For

When debugging the IOS code today, the error "has no segue with identifier" is always prompted. What's even more strange is that debugging on the simulator is normal, and debugging on the real machine will cause this error. I have been developing

In a non-ARC development environment, dealloc is the last chance to clean up the memory before the class is released. Which variables and attributes should be released? How should some special classes (nstimer, observer) be released. It should be