zjwen1006的专栏

http://itunes.apple.com/cn/app/id468941250?mt=8

openURL的使用方法：[[UIApplication sharedApplication] openURL:[NSURL URLWithString:appString]];其中系统的appString有：1.Map http://maps.google.com/maps?q=Shanghai 2.Email mailto://myname@google.com 3.Tel t

UIImageView *imgView  = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0,320, 44)];imgView.userInteractionEnabled = YES;UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWi

学习过程当中查找到的资料，做一个记录，以便更多朋友查看。开发的过程有时候是简单的，因为我们可以站在巨人的肩上，跳得更高，走得更远。如何用Facebook graphic api上传视频：http://developers.facebook.com/blog/post/532/Keychain保存数据封装：https://git

When you develop forms or any screens with input fields, occasionally the inputs will be obscured by the keyboard when it appears. This is bad usability for the user who now has to input data without

啥也不说直接上源代码：BOOL NSStringIsValidEmail(NSString *checkString)    {        NString *stricterFilterString = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+//.[A-Za-z]{2,4}";        NSString *laxString = @".+@.

NSArray可以用NSPredicate来过滤数组内容，代码：//找出一个数组      NSFileManager *fileManager = [NSFileManager defaultManager];      NSString *defaultPath = [[NSBundle mainBundle] resourcePath];      NSError *er

RT，大致步骤如下：1、Create a HTTP HEAD request.2、Read the "Last-Modified" header and convert the string to a NSDate.3、Read the last modification timestamp of the local file.4、Compare the two tim