iOS 开发总结(6)

来源：未知责任编辑：责任编辑发表时间:2013-12-01 14:19　点击:次

Iphone Android Windows Phone 其他技术

[doneButton addTarget:self action:@selector(addRadixPoint) forControlEvents:UIControlEventTouchUpInside];

// locate keyboard view

UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];//返回应用程序window

UIView* keyboard;

for(int i=0; i<[tempWindow.subviews count]; i++) //遍历window上的所有subview

{

keyboard = [tempWindow.subviews objectAtIndex:i];

// keyboard view found; add the custom button to it

if([[keyboard description] hasPrefix:@"<UIKeyboard"] == YES)

[keyboard addSubview:doneButton];

}

正则表达式使用：

被用于正则表达式的字串必须是可变长的，不然会出问题

将一个空间放在视图之上

[scrollView insertSubview:searchButton aboveSubview:scrollView];

从本地加载图片

NSString *boundle = [[NSBundle mainBundle] resourcePath];

[web1 loadHTMLString:[NSString stringWithFormat:@"<img src=http://www.2cto.com/uploadfile/2012/1214/20121214044003551.com/&'/>"] baseURL:[NSURL fileURLWithPath:boundle]];

从网页加载图片并让图片在规定长宽中缩小

[cell.img loadHTMLString:[NSString stringWithFormat:@"<html><body><img src='http://fei263.blog.163.com/blog/%@' height='90px' width='90px'></body></html>",goodsInfo.GoodsImg] baseURL:nil];

将网页加载到webview上通过javascript获取里面的数据，如果只是发送了一个连接请求获取到源码以后可以用正则表达式进行获取数据

NSString *javaScript1 = @"document.getElementsByName('.u').item(0).value";

NSString *javaScript2 = @"document.getElementsByName('.challenge').item(0).value";

NSString *strResult1 = [NSString stringWithString:[theWebView stringByEvaluatingJavaScriptFromString:javaScript1]];

NSString *strResult2 = [NSString stringWithString:[theWebView stringByEvaluatingJavaScriptFromString:javaScript2]];

用NSString怎么把UTF8转换成unicode

utf8Str //

NSString *unicodeStr = [NSString stringWithCString:[utf8Str UTF8String] encoding:NSUnicodeStringEncoding];

View自己调用自己的方法:

[self performSelector:@selector(loginToNext) withObject:nil afterDelay:2];//黄色段为方法名,和延迟几秒执行.

显示图像:

CGRect myImageRect = CGRectMake(0.0f, 0.0f, 320.0f, 109.0f);