我试图通过jQuery从下拉列表中获取所选值.当我单击SEND时,我有一些javascript验证表单,以确保没有空格,代码如下:
function formCheckDancer(formobj){
// Enter name of mandatory fields
var fieldRequired = Array("dancerStageName", "dancerFullName", "dancerPhone", "dancerEmail", "dancerCountry", "dancerAvailableDate");
// Enter field description to appear in the dialog box
var fieldDescription = Array("Stage Name", "Full Name", "Phone Number", "Email Address", "Nationality", "Availability");
// dialog message
var alertMsg = "Please complete the following fields:\n";
var l_Msg = alertMsg.length;
for (var i = 0; i < fieldRequired.length; i++){
var obj = formobj.elements[fieldRequired[i]];
if (obj){
switch(obj.type){
case "select-one":
if (obj.selectedIndex == -1 || obj.options[obj.selectedIndex].text …
Run Code Online (Sandbox Code Playgroud) 关于Core Location的一个简单问题,我正在尝试计算两点之间的距离,代码如下:
-(void)locationChange:(CLLocation *)newLocation:(CLLocation *)oldLocation
{
// Configure the new event with information from the location.
CLLocationCoordinate2D newCoordinate = [newLocation coordinate];
CLLocationCoordinate2D oldCoordinate = [oldLocation coordinate];
CLLocationDistance kilometers = [newCoordinate distanceFromLocation:oldCoordinate] / 1000; // Error ocurring here.
CLLocationDistance meters = [newCoordinate distanceFromLocation:oldCoordinate]; // Error ocurring here.
}
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我在最后两行收到以下错误:
错误:无法转换为指针类型
我一直在搜索谷歌,但我找不到任何东西.
我在CakePHP应用程序中遇到以下错误:
由于可能的配置错误,请求超出了10个内部重定向的限制.如有必要,使用'LimitInternalRecursion'增加限制.使用'LogLevel debug'来获取回溯.,referer:http://projectname.dev/
根文件夹中的.htaccess如下所示:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^$ app/webroot/ [L]
RewriteRule (.*) app/webroot/$1 [L]
</IfModule>
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并在app文件夹中:
<IfModule mod_rewrite.c>
RewriteEngine on
RewriteRule ^$ webroot/ [L]
RewriteRule (.*) webroot/$1 [L]
</IfModule>
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并在webroot文件夹中:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /projectname
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^(.*)$ index.php?url=$1 [QSA,L]
</IfModule>
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我正在学习本教程:
http://book.cakephp.org/2.0/en/getting-started.html
问候,斯蒂芬
无论如何都要在iTunes连接中更改应用程序名称.我花了3或4次尝试上传我的应用程序第一次,不知何故,我做了一点点混乱.
iTunes Connect现在告诉应用程序名称已被使用且无法重复使用.有没有办法解决 ?
设备上显示的实际应用名称是正确的,我在info.plist上对此进行了编辑.
问候,斯蒂芬
我试图将整数格式化为2个字符,即01,02,03而不是1,2,3,4.
我做了一些谷歌搜索但找不到任何东西.可以更改@"%d"以反映2个字符吗?
timeArray = [[NSMutableArray alloc] init];
for (int i = 0; i < 25; i++){
NSString *timeValue = [NSString stringWithFormat:@"%d", i];
[timeArray addObject:timeValue];
NSLog(@"Time: %@", timeValue);
}
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问候,斯蒂芬
我已经在我的应用程序中添加了一些带有背景图像的按钮(下面的RESET按钮),但角落非常符合预期.见下文:
RESET按钮的左下角和右下角似乎是平方的.我的原始图像有圆角.
以前有人遇到过这个问题吗?
我遇到了getDistanceFrom和distanceFromLocation的问题.不推荐使用getDistanceFrom iOS 4.1和distanceFromLocation在3.1.3中不可用,我该如何解决这个问题.
还有其他人遇到过这个问题吗?
我的代码目前是:
CLLocationDistance kilometers;
if ([currentLocation respondsToSelector: @selector(distanceFromLocation:)])
{
kilometers = [currentLocation distanceFromLocation:previousLocation] / 1000;
}
else
{
//kilometers = [currentLocation getDistanceFrom:previousLocation] / 1000;
kilometers = [currentLocation performSelector: @selector(getDistanceFrom:) withObject: previousLocation] / 1000;
}
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根据我编译的iOS,我会在行上获得"无效的二进制操作数":
kilometers = [currentLocation distanceFromLocation:previousLocation] / 1000;
kilometers = [currentLocation performSelector: @selector(getDistanceFrom:) withObject: previousLocation] / 1000;
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问候,斯蒂芬
我正在尝试以编程方式为我的应用中的标签栏设置背景图片.我的代码如下:
RootViewController.h
IBOutlet UITabBar *mainTabBar;
IBOutlet UITabBarItem *settingsBarItem;
IBOutlet UITabBarItem *infoBarItem;
IBOutlet UITabBarItem *aboutBarItem;
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RootViewController.m
-(void)viewDidLoad {
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"smallMenuBackground.png"]];
[mainTabBar insertSubview:imageView atIndex:0];
[imageView release];
[super viewDidLoad];
}
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这不适合我.
UPDATE
更新2012年1月23日
好的,我已经取得了一些进展.自从我升级到Xcode 4.2和IOS5后,这才停止工作.我设法使用Interface Builder中的选项将其恢复,但现在它仅适用于IOS5.理想情况下,我希望以编程方式开始工作,但我现在将满足于IB解决方案.
我似乎无法让它适用于任何以前的版本.
注意:我的TabBar只在我的RootViewController上,这是我的应用程序的主屏幕.
理想情况下,如果我能让Nithin建议的代码正常运行,那就太棒了:
UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"tabBG.png"]];
if ([[[UIDevice currentDevice] systemVersion] floatValue] > 4.9) {
//iOS 5
[self.tabBarController.tabBar insertSubview:imageView atIndex:1];
}
else {
//iOS 4.whatever and below
[self.tabBarController.tabBar insertSubview:imageView atIndex:0];
}
[imageView release];
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任何帮助,将不胜感激.
问候,斯蒂芬
我不理解NSFetchRequest返回的数组的NSLog输出.
我正在读取我的数据库并将内容放在一个数组中,循环遍历数组,然后使用NSLog输出内容.我不太明白日志文件中的输出.代码如下:
-(void)createXMLFeed{
//Fetch details from the database.
NSFetchRequest *request = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription entityForName:@"Tabrss" inManagedObjectContext:managedObjectContext];
[request setEntity:entity];
NSError *error;
self.stories = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
//[request release];
// Count the number of items in the array and display in the log.
int arrayItemQuantity = [stories count];
NSLog(@"Array Quantity: %d", arrayItemQuantity);
// Loop through the array and display the contents.
int i;
for (i = 0; i < arrayItemQuantity; i++)
NSLog (@"Element %i = %@", i, …
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