我正在编写一个脚本,我想要它(现在)根据他们按下的按钮重定向用户.最终它将采取表单输入并将其合并到重定向中,但是现在我只是试图让按钮将用户发送到适当的站点.但是,我的重定向不起作用.
<html>
<head>
<title>
Home
</title>
</head>
<body>
<script type="text/javascript">
<!--
var textstring;
var btnWhichButton;
//Gets the text from the form
function getQ() {
textstring = document.forms['Search'].elements[0].value;
}
//Does a Google Search
function googleSearch() {
window.location ="http://www.google.com";
}
//Does a YouTube Search
function youtubeSearch() {
window.location = "http://youtube.com";
}
//Figure out which button was pressed
function whichButton() {
if (btnWhichButton.value == 'Google Search' ) {
googleSearch();
} else if (btnWhichButton.value == 'YouTube Search' ){
youtubeSearch();
}
}
//main function to …Run Code Online (Sandbox Code Playgroud) 我正在尝试以编程方式添加和信息按钮到我的应用程序的导航.但是,它并没有触发我正在注册的动作.
UIBarButtonItem* infoButton =[[UIBarButtonItem alloc] initWithCustomView:[UIButton buttonWithType:UIButtonTypeInfoLight]];
[infoButton setTarget:self];
[infoButton setAction:@selector(infoButtonTapped)];
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该按钮显示在我的导航栏中,但点击它不会传递到infoButtonTapped
当我在MatLab中执行这些等效操作时,第一个在24.158371秒(for循环)运行.第二个运行在0.004976秒(逻辑索引).MatLab可能会做什么,这使得运行速度更快?这仍然是O(n)时间,对吧?
t = linspace(-2*pi,2*pi,100000);
fd = 1e3;
tau = 1e-6;
% Calculate arbitrary function using a loop
tic
for tind = 1:length(t)
tester(tind) = cos(2*pi*fd*t(tind))/(2*pi*fd.*t(tind));
end
toc
pause; disp('Press a key');
% Same calculation with logical indexing
tic
tester2 = cos(2*pi*fd.*t)./(2*pi*fd.*t);
toc
Run Code Online (Sandbox Code Playgroud) 我有一个位图图像,当前表示为字节数组(可能是YCrCb或RGB).是否有一个内置OpenGL的函数可以让我查看这个字节数组中的单个像素?
我知道有函数glReadPixels但是如果我已经获得了数据,我不需要从帧缓冲区读取.
如果没有,是否有另一种方法在C++中执行此操作?
我正试图在我的UITableView中的某些单元格中显示图像.这是我的configureCell方法:
-(void)configureCell:(UITableViewCell *)cell atIndexPath:(NSIndexPath *)indexPath {
StoryInfo *info = [self.fetchedResultsController objectAtIndexPath:indexPath];
UIImage *ribbon = [UIImage imageNamed:@"ribbon.png"];
UIImageView *ribbonView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 15, 15)];
[ribbonView setImage:ribbon];
[cell addSubview:ribbonView];
if([[NSNumber numberWithBool:NO] isEqualToNumber:info.visited]) {
cell.textLabel.textColor = [UIColor colorWithRed:53/255.0 green:53/255.0 blue:52/255.0 alpha:1];
ribbonView.hidden = NO;
}
else {
cell.textLabel.textColor = [UIColor colorWithRed:128.0/255.0 green:128.0/255.0 blue:128.0/255.0 alpha:1.0];
ribbonView.hidden = YES;
}
}
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这里是cellForRowAtIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// set up …Run Code Online (Sandbox Code Playgroud) 我正在尝试制作我的导航栏RGB(32,29,29),但当应用程序启动时(目前在Xcode 5.0.2的模拟器中工作),它呈现为RGB(42,38,38).
这是我想要的颜色: 
这就是我得到的颜色: 
一个微妙的区别,但很奇怪.这是我的AppDelegate.m中的外观代码:
application.statusBarStyle = UIStatusBarStyleLightContent;
[UINavigationBar appearance].tintColor = [UIColor whiteColor];
[UINavigationBar appearance].barStyle = UIBarStyleBlack;
[UINavigationBar appearance].barTintColor = [UIColor colorWithRed:32.0/255.0 green:29.0/255.0 blue:29.0/255.0 alpha:1.0];
[UITextField appearance].keyboardAppearance = UIKeyboardAppearanceDark;
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我尝试了删除其中一些设置的变体,看看是否正在应用色调,但到目前为止,我无法弄明白.这是怎么回事?
我是红宝石的新手.我写了一个小脚本,在顶部我有以下内容:
require 'rubygems'
require 'net/http'
require 'json'
require 'curb'
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但是当我尝试运行脚本时,我得到以下内容:
C:/Ruby193/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require': cannot loa
d such file -- curb (LoadError)
from C:/Ruby193/lib/ruby/1.9.1/rubygems/custom_require.rb:36:in `require
'
from rImDrop.rb:4:in `<main>'
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到目前为止我发现的所有东西都表明require 'rubygems'会解决这个问题,但显然不是我的情况.下一个猜测是我的Gems安装不正确吗?
编辑: 我应该指出我在Windows 7上...
当我跑步时,gem install curb我得到:
Temporarily enhancing PATH to include DevKit...
Building native extensions. This could take a while...
ERROR: Error installing curb:
ERROR: Failed to build gem native extension.
C:/Ruby193/bin/ruby.exe extconf.rb
checking for curl-config... no
checking for main() in -lcurl... no
*** extconf.rb failed *** …Run Code Online (Sandbox Code Playgroud) ios ×3
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