摘要：If you have tried to send any information using a GET web request, you would have come cross an annoying problem, That annoying problem is making sure that the URL is corrently encoded. The issue is that by default most of these methods leave characters such as & = ? within a URL, as they are st 阅读全文

摘要：1. Hide the existing system controls of the MPMobilePlayerController. MPMoviePlayerController * _videoPlayer; ... _videoPlayer.controlStyle = MPMovieControlStyleNone; ...2. Add your customized view with customized control buttoms (play, pause, stop, prev, next) or slider (volumn slider) to the _... 阅读全文

摘要：TheCore Graphics API is an object oriented API. To allow developers to use that API in as many environments as possible, however, the system implements it as a set of C routines. The API itself draws upon the object-oriented concepts of encapsulation, inheritance, and polymorphism. Because C doesn&# 阅读全文

摘要：self.navigationItemself.navigationController.navigationItemself.navigationController.navigationBar1, 不要混淆 self.navigationItem 和 self.navigationController.navigationItem ,UINavigationItem 本身是用来 定制 ViewController 自己在被导航过程中的 appearence ， navigationItem 是 UIViewController 类 关于UINavigationControllerItem 阅读全文

摘要：In windows 7 Snipping Tool is a wonderful tool to take a screen shot. However in MaxOS X , you need find another way.below , i will tell you how to take a screen shot in Max OS X:I Must agree with myself on this that switching to Max OS X wasn't the easiest thing to do , i had to learn around ne 阅读全文

摘要：Apple 对iPhone应用程序中的png图片进行了特殊的处理，在png文件头之后加了一个非标准的CgBI数据段，IDAT段图像数据也没有传统的压缩数据头和尾，并且红色和蓝色是反的，这样就无法在Mac或Windows下不能正常使用了。洋人已经搞定了，先下载这个程序：http://acquisition.dreamhosters.com/iPhonePNG.zip解压后将 iPhonePNG 这个二进制文件复制到 /Applications 目录假设你的图片在./img目录下，想转换到 ./decode 目录，在终端执行：$ find ./img -name "*.png" 阅读全文

摘要：If your application runs in landscape mode only, however, you must perform the following steps to make it launch in a landscape orientation initially.In your application’s Info.plist file, add the UIInterfaceOrientation key and set its value to the landscape mode. For landscape orientations, you can 阅读全文

摘要：直接log :- (void)viewDidLoad{ [superviewDidLoad]; UIView * whiteView = [[UIView alloc] initWithFrame:CGRectMake(10, 10, 90, 90)]; whiteView.backgroundColor = [UIColorwhiteColor]; UILabel * label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 70, 20)]; label.text = @"kkjkjkkjkjkjkjjkjkjkjjkjkkj 阅读全文

摘要：UIKit 框架属于高层框架，除此之外，另两个低层框架是经常用到的: Core Graphics And image I/O .通过Core Graphics我们可以创建和应用image masks，从一个存在的iamges中创建一部分对象，应用一个色彩空间，可以通过每一个字节，每一个像素的访问images，并渲染。image I/O 框架和Core Graphics紧密相关。它允许应用程序去读取和写入各种image文件格式。它可以快速的编码和解码image，iamge metadata和image caching。UIImageView is a method to display an I 阅读全文

摘要：在IOS4上运行的应用程序对于每一个image资源要包括两个独立的文件。两种图片的命名如下：Standard: <ImageName><device_modifier>.<filename_extension>High resolution: <ImageName>@2x<device_modifier>.<filename_extension><device_modifier>是可选的可以是~ipad或者~iphone。（1）从应用程序中载入imagesUIImage类处理了载入高分辨率images的各种工作 阅读全文

摘要：在ios中，有两种基本的drawing技术。一种就是使用原生的drawing技术。此技术包括Core Graphics和UIKit框架，支持2D drawing。另一种就是使用OpenGL ES，此支持2D和3D。1. Quartz在IOS中是native window server和drawing 技术的统称。2. Core Graphics 框架是Quartz的核心，提供了用来drawing content的主要接口。3. UIKit有Quartz的基本特征，提供了一些集中的graphics-reated 操作current transformation matrix(CTM)是一个数学矩 阅读全文