小编Ank*_*rya的帖子

我创建了一个Cordova 2.1.0应用程序,它在前2-3次运行良好.但是现在当我试图通过终端运行它时,它给了我以下错误.我没有改变任何东西.

Ankurs-Mac-mini:~ ankur$ /Users/ankur/Desktop/CordovaSMS/cordova/emulate 
Ankurs-Mac-mini:~ ankur$ 2012-10-17 16:11:08.695 ios-sim[7032:507] stderrPath: 
/Users/ankur/Desktop/CordovaSMS/cordova/console.log
2012-10-17 16:11:08.698 ios-sim[7032:507] stdoutPath: 
/Users/ankur/Desktop/CordovaSMS/cordova/console.log
[DEBUG] Session could not be started: Error Domain=DTiPhoneSimulatorErrorDomain 
Code=1 "iOS Simulator failed to install the application." UserInfo=0x7fc643902320 
{NSLocalizedDescription=iOS Simulator failed to install the application.,
DTiPhoneSimulatorUnderlyingErrorCodeKey=-1}

任何帮助,将不胜感激.谢谢

我有一个UIImageView显示更大的图像.它似乎是居中的,但我想把那个图像移到里面UIImageView.我查看了Apple 的MoveMe示例,但我无法弄清楚他们是如何做到的.看起来他们甚至没有UIImageView.有任何想法吗？

桥接头有什么用？

它只是在同一个项目中使用Objective-C和Swift代码吗？

我们应该避免使用桥接头吗？

比方说,如果有两个非常相似的第三方图书馆; 其中一个在Objective-C中,另一个在Swift中.我们应该使用Swift库还是使用Objective-C库.使用桥接头是否有任何缺点？

我试图root在函数中使用属性作为默认参数，add如下所示，它给了我一个错误：

无法使用实例成员“root”作为默认参数。

但是，当我root在嵌套函数中使用时search，它工作正常。

class Trie {
   var root = TrieNode()

   func add(value: String, node: TrieNode? = root) { // error
      var myNode = node
      if myNode == nil {
        myNode = root
      }
      if value.count == 0 {
        node?.setEnd()
        return
      } else if myNode!.keys[String(value.first!)] == nil {
        myNode!.keys[String(value.first!)] = TrieNode()
        return add(value: String(value.dropFirst()), node: myNode!.keys[String(value.first!)])
    } else {
        return add(value: String(value.dropFirst()), node: myNode!.keys[String(value.first!)])
    }
   }


  func allWords() -> [String] {
    var words …

我正在使用Xcode 4.4.1.当我在.m文件中定义 @property like UINavigationController或NSArrayin .h文件时,我必须@synthesize在.m文件中.但有些人@property喜欢UITabBarController或者NSString我没有这样做才能@synthesize让它发挥作用.

我的问题是@property需要@synthesize什么,什么不需要.

AppDelegate.h

@interface AppDelegate : UIResponder <UIApplicationDelegate>
{
UITabBarController *_tabBar;
UINavigationController *_navBar;
}

@property (strong, nonatomic) UIWindow *window;
@property (nonatomic, retain) Employee *empView;
@property (nonatomic, retain) UITabBarController *_tabBar;
@property (nonatomic, retain) UINavigationController *_navBar;

AppDelegate.m

@implementation AppDelegate
@synthesize _navBar;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after …

我有工作MKMapView用绘制的路线MKPolyline,我能画一个路线与waypoints.Now我想提请多个阵列MKPolyline上的S MKMapView例如,一个蓝色MKPolyline的28.102021, 77.10129到28.20320, 77.3021和阿红MKPolyline从28.50930, 77.89192到28.60291, 77.87328.我怎样才能做到这一点？

码:

- (void)viewDidLoad
{
[super viewDidLoad];

locationManager = [[CLLocationManager alloc] init];
locationManager.desiredAccuracy = 6.0;
locationManager.distanceFilter = 1.0;
[locationManager startUpdatingLocation];
locationManager.delegate = self;
map.delegate = self;
[map setShowsUserLocation:YES];
[map setUserTrackingMode:MKUserTrackingModeFollow animated:YES];
wayPoints = [[NSMutableArray alloc] initWithCapacity:30];
newWayPoints = [[NSMutableArray alloc]initWithCapacity:10];
totalDistance = 0.0;

stopTime = [NSDate dateWithTimeIntervalSinceNow:100];
startTime = [NSDate date];

SEL sel = @selector(timerTargetMethod);
NSInvocation* …

我有一个NSMutableArray对象,其是中AdDetail持有少数属性(如:ADID,adTitle,adPrice ...等)类.我想只删除那些有的对象adID = 0.我怎样才能做到这一点 ？

我收到错误Preprocessor directives must appear as the first non-whitespace character on a line.我需要在代码中进行更改才能使其正常工作？

protected void Button3_Click(object sender, EventArgs e)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[21] { new DataColumn("Siebel_SR#"),
          new DataColumn("Siebel_SR#1"), new DataColumn("Tran_Qty"), new DataColumn("Ord_Sou_Ref"),
          new DataColumn("Tran_Reference"), new DataColumn("[Ord Number]"), new DataColumn("[Ord Number1]"),
          new DataColumn("Transaction_Type_Id"), new DataColumn("Trans_Date"), new DataColumn("[Trans Sub]"),
          new DataColumn("Business"), new DataColumn("New_DFF_SR#"), new DataColumn("Reason_Name"),
          new DataColumn("Line_Type"), new DataColumn("Org"), new DataColumn("Sub_Inv"), new DataColumn("Part_Num"),
          new DataColumn("[Last Updated By]"), new DataColumn("[Created By]"), new DataColumn("Employee"), new DataColumn("DateWorked") }); 
        foreach (GridViewRow …