不及格的程序员-八神

摘要： 在企业分发的app下载过程中，iOS8发现挂在官网上的企业版的app点击了提示是否安装应用程序，但始终安装不上程序，的device console发现安装的时候出现LoadExternalDownloadManifestOperation: Ignore manifest download, alr... 阅读全文

摘要： 今天测试最新的微信iOS SDK, 仅仅是建了一个空的工程，把sdk加进去运行，就报了以下错误: Undefined symbols for architecture x86_64: "operator delete[](void*)", referenced from: +[WeChatApiUt 阅读全文

摘要： 第一、四个用途 用途一： 定义一种类型的别名，而不只是简单的宏替换。可以用作同时声明指针型的多个对象。比如：char* pa, pb; // 这多数不符合我们的意图，它只声明了一个指向字符变量的指针， // 和一个字符变量；以下则可行：typedef char* PCHAR; // 一般用大写PCH 阅读全文

摘要： #include #include // Define a callback to be called when the sound is finished// playing. Useful when you need to free memory after playing.static vo... 阅读全文

摘要： 最近做了一个cs客户端，可以向服务器注册新用户，界面中有验证码，结果我在服务器那边返回生成的验证码，放到session中。 我具然忘了，在客户端内部直接生成随机验证码，这个我以前做过的啊，晕 好久不做这样的程序了，思维都被固封在一个模式中了。 好久没写.net了 ，好久没写javascript了。。 阅读全文

摘要： Predicate SELF Represents the object being evaluated. CORE DATA Retrieving Specific Objects If your application uses multiple contexts and you want to 阅读全文

摘要： Libraries and frameworks are designated as Required by default, but you can change this designation to Optional.Required libraries must be present on ... 阅读全文

摘要： Learn about the startup key combinations you can use with Intel-based Macs. You can use the following startup key combinations with Intel-based Macs. 阅读全文

摘要： Debugging Process Startup Q: How do I debug a process's startup code? A: This depends on how the process is launched. For a typical application-level 阅读全文

摘要： Glossary term terminology Certificate authority A norganization that authorizes a certificate. Certificate authority A norganization that authorizes a 阅读全文

摘要： I understand that the External Accessory framework in iOS 3.0 and later will allow my application to communicate with Bluetooth devices. So why doesn't my application see the Bluetooth accessory sitting next to my iPhone?A:The External Accessory framework is designed to allow iOS applications to 阅读全文

摘要： The HTML importer should not be called from a background thread (that is, the options dictionary includesNSDocumentTypeDocumentAttribute with a value 阅读全文

摘要： IOS7 app 默认是全屏模式，所以之前的程序窗口会上向移动到状态栏上面，所以在底边会有一条大白边表格单元格，默认是白色背景，之前程序设置的透明效果，这里不在起作用，需要用下面的委托方法改变。- (void)tableView:(UITableView*)tableViewwillDisplayCell:(UITableViewCell*)cellforRowAtIndexPath:(NSIndexPath*)indexPath表格委托方法- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInte 阅读全文

摘要： file:///Users/yangiori/Library/Developer/Shared/Documentation/DocSets/com.apple.adc.documentation.AppleiOS7.0.iOSLibrary.docset/Contents/Resources/Documents/navigation/index.htmlA workaround - open your browser and go to:file:///Users/userName/Library/Developer/Shared/Documentation/DocSets/com.apple 阅读全文

摘要： High Precision Timers in iOS / OS XThe note will cover the do's and dont's of using high precision timers on iOS and OS X.High Precision Timers in iOS / OS XDo I need a high precision timer?A suggestion for synchronizing with display updatesHow do timers work?How do high precision timers wor 阅读全文

摘要： Unable to create any keyboard shortcuts after the iOS 6.1.3 update on iPad 3 I had two keyboard shortcuts on my device before updating to iOS 6.1.3. A 阅读全文

摘要： The iPad Split-Keyboard and (Missing) NotificationsPosted on May 19, 2012Developing an app that people actually use is a great way to discover holes in your knowlege of new APIs. I recently released a side project of mine for sale on the App Store under the nameOnePAD. It's an electronic pocket 阅读全文

摘要： -(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{1 if([[segue identifier] isEqualToString:@"groupPopoverSegue"])2 {3 UIViewController *vc = segue.destinationViewController; //popover 视图控制器时，ios5视图控制器会马上执行viewdidload，ios6中当你显示执行第5行语句时也会执行viewdidload。非popover会等prepareFor.. 阅读全文

摘要： self.contentView 里有时会出这样的子视图。。。。<UILabel: 0x81667f0; frame = (0 0; 0 0); clipsToBounds = YES; userInteractionEnabled = NO; layer = <CALayer: 0x8166880>> 阅读全文

摘要： (lldb) po [success compare:@"yes"] $1 = 0 <nil> (lldb) p [success compare:@"yes"] (int) $2 = 0 (lldb) p [success isEqualToString:@"yes"] 安全写法 (char) $ 阅读全文

摘要： 我是从asp时代过来的程序员，那个时代如果你传一个name相同的多个表单元素到后台时，它会形成一个数组，你可以获取name就行了， 但是当jQuery1.4出来时就不一样了，它改变了规则，它默认加了［］符号到name后面，变成了name［］. {foo: ["bar", "baz"]} 会被序列化为 阅读全文

摘要： AX ERROR: Could not find my mock parent, most likely I am stale使用设计好的cell做为表头视图，控制出现的log，挺有意思。 1 - (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section 2 { 3 4 IoriTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"DataDetailHeadCell"]; 5 阅读全文

摘要： 1 /* Basic data types for Objective C. 2 Copyright (C) 1993, 1995, 1996, 2004 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistrib... 阅读全文

摘要： public class UDIParser { /// <summary> /// 数据库UDI解析规则数据映射:iKeyID, cDateFormat, cKeyValue, iPos_From, iPos_To, /// </summary> public static System.Coll 阅读全文

摘要： 双检锁技术 Java @ThreadSafe public class Singleton { private static class ResourceHolder { public static Resource res = new Resource(); } public static Res 阅读全文

摘要： 1、Object-C有多继承吗？没有的话用什么代替？ cocoa 中所有的类都是NSObject 的子类 多继承在这里是用protocol 委托代理 来实现的你不用去考虑繁琐的多继承 ,虚基类的概念.ood的多态特性 在 obj-c 中通过委托来实现. 2、Object-C有私有方法吗？私有变量呢？ 阅读全文

摘要： UIDateicker并没有继承UIPickerView,它的宽度只有iphone的宽度，在ipad上直接显示出来非常不协调，所以苹果建议用UIPopoverViewController来显示，所以你可以在里面任意定制。 在iphone中显示需要手动配制动画，因为它只是一个视图。所以你有下面几种方式 阅读全文

摘要： json: 效果图： 阅读全文

摘要： Ah found it, they are saved at:~/Library/Developer/Xcode/UserData/CodeSnippets/Each one is a plist file. In contrast to Xcode 3 there is now one file per snippet. 阅读全文

摘要： Your app has aUIWindow, which contains your root view controller's view, which contains the button:UIWindowyour root viewUIButtonWhat you didn't understand is that theUIWindowrotates the user interface by applying a rotation transform to your root. Take a look at the view hierarchy when the 阅读全文

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摘要： When you run the Build and Archive command, Xcode 3.2.2 or later fetches your application binary and its associated .dSYM file and saves them in your 阅读全文

摘要： Using Injection it is possible to make a change to the implementation of an Objective-C® class and have it take effect as soon as the class is saved without having to restart the application. This feature works for OS X and iOS applications in the simulator and on iOS devices. 阅读全文

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摘要： Three20框架好久不用了，而且也已经过时了，不过它在当时来讲确认解决了许多麻烦，省确了许多代码，仅此环念。最近用xcode4.2打开老项目后发现，不能编译，解决掉那些被警告的过时api后又发现 “Empty TTTableViewHeaders displaying although they shouldn't!”，因为苹果在ios5这后表格行为发生了变化。不过最为有趣的是我使用xcode3.2编译到我的ios5真机中，显示是正确的，而用xcode4.2编译就会出现empty head.tableView:heightForHeaderInSection:Special Cons 阅读全文

摘要： UIView Class Reference - Instance MethodslayoutSubviewsLays out subviews.- (void)layoutSubviewsDiscussionThe default implementation of this method doe... 阅读全文

摘要： Today, i had trying update my project with three20 to ios6, but somethings had raised that it reports errors (e.g. _tapCount，_view can not by finded) in fileUIViewAdditions.m.打开文件后发现里面有宏定义，判断如果是调试阶段，会使用 私有变量 输出某些信息，结果屏避之再编译就可以了。 1 / Remove GSEvent and UITouchAdditions from Release builds 2 #ifdef .. 阅读全文

摘要： 在非arc与arc的环境中使用时，导致程序crash. 1 //当前类使用－fno-objc 编译 2 3 needle_ = [[MyView alloc] init]; 4 5 needleLayer = [CALayer layer]; 6 needleLayer.delegate = sel 阅读全文

摘要： 1 #define PSIZE 16 // size of the pattern cell 2 3 static void MyDrawStencilStar (void *info, CGContextRef myContext) 4 { 5 int k; 6 dou... 阅读全文

摘要： 最近用objective-c画图形，当时我就是想无论在Mac或Ｗindows平台中都存在绘图环境（并且graphics content都拥有图形环境状态堆栈）的概念,这种绘图模型是谁发明的，最早使用这种模式的是什么编程平台？终于找到最原始的出处：来自Adobe的postscript,我认为是在苹果成... 阅读全文