小编Csa*_*abi的帖子

如果我想从NSString获取值@"value:hello World:value",我应该使用什么？

我想要的返回值是@"hello World".

我如何onBackPressed()在搜索模式下处理？我已经实现了搜索ActionBar,我想处理onBackPressed().

编辑:

在MainActivity我加入了这一点,但它在搜索关闭仅获得通知

@Override
public void onBackPressed() {
    mMenu.findItem(R.id.menu_eye).setVisible(true);
    mMenu.findItem(R.id.menu_layers).setVisible(true);
    super.onBackPressed();  
};

我的搜索动作监听器如下所示:

import com.cyrilmottier.polaris.PolarisMapView;

import android.app.SearchManager.OnCancelListener;
import android.content.Context;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.SearchView;

public class SearchListener implements SearchView.OnQueryTextListener, SearchView.OnCloseListener, SearchView.OnSuggestionListener, OnClickListener, OnCancelListener{

    private Context mContext;
    private PolarisMapView mMapView;
    private Menu mMenu;
    private SearchView mSearchView;

    public SearchListener(Context c, PolarisMapView mMapView, Menu mMenu, SearchView mSearchView){
        this.setmContext(c);
        this.setmMapView(mMapView);
        this.setmMenu(mMenu);
        this.mSearchView = mSearchView;
    }

    @Override
    public boolean onQueryTextChange(String newText) {
        return false; …

我试图抓住一个手势,但它不起作用.这是我的代码:

UISwipeGestureRecognizer *recognizer;
    recognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];
    [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight | UISwipeGestureRecognizerDirectionLeft)];
    [[self view] addGestureRecognizer:recognizer];
    [recognizer release]; 

和

-(void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer {
    NSLog(@"get gesture");
    if (recognizer.direction == UISwipeGestureRecognizerDirectionRight) {
        NSLog(@"get gesture right");
    }
    if (recognizer.direction == UISwipeGestureRecognizerDirectionLeft) {
        NSLog(@"get gesture Left");
    }
}

它总是得到一个手势,但不认识方向.我也试过if(recognizer.direction){NSLog(@"get gesture");},它也有效,所以我不明白我犯了哪个错误.

谢谢你的帮助.

我已经实现了一个openCV应用程序,我使用SURF描述符.它工作正常,代码如下所示:

我减少输入视频流大小以加快速度

            capture.set(Highgui.CV_CAP_PROP_FRAME_WIDTH, display.getWidth());
            capture.set(Highgui.CV_CAP_PROP_FRAME_HEIGHT, display.getHeight());

            capture.retrieve(mRgba, Highgui.CV_CAP_ANDROID_COLOR_FRAME_RGBA);

            try{

          //-- Step 1: Detect the keypoints using SURF Detector

            surfDetector.detect( mRgba, vector1 );

            for (KeyPoint t : vector1)
                Core.circle(mRgba, t.pt, 10, new Scalar(100, 100,100));    

          //-- Step 2: Calculate descriptors (feature vectors)
            //extractor.compute(mRgba, vector1, descriptor1);

          //-- Draw matches
            //Mat img_matches;
            //drawMatches( mRgba, vector1, mRgba, vector1, matches, img_matches );


            }catch(Exception e){
                Log.e( "ERROR", e.toString());

            }

但是计算仍然太慢,所以我需要找到另一种方法来减少输入视频流的质量.或者如果您知道另一种加速它的方法,请随时与我分享;)

谢谢你的时间和答案

就好奇而言,UIView类的nextResponder方法实现如何知道谁是管理视图的UIViewController？UIResponder文档说明了这一点,我可以看到它有效,但我不太明白.据我所知,UIView没有保持对它的控制器的引用,那么幕后发生了什么？或者我只是遗漏了一些明显的东西？

我对Objective-C和iPhone的开发还很新,所以如果这很明显,我很抱歉,但我很好奇.

谢谢!

如何向DialogFragment添加动画.我的动画是:

出于动画:

<scale
    android:duration="200"
    android:fillAfter="false"
    android:fromXScale="1.0"
    android:fromYScale="1.0"
    android:interpolator="@android:anim/linear_interpolator"
    android:pivotX="50%"
    android:pivotY="-90%"
    android:startOffset="200"
    android:toXScale="0.5"
    android:toYScale="0.5" />

<translate
    android:duration="300"
    android:fromXDelta="0"
    android:fromYDelta="0"
    android:toXDelta="-200"
    android:toYDelta="-200" />

在动画中:

<scale
    android:duration="200"
    android:fillAfter="false"
    android:fromXScale="0.5"
    android:fromYScale="0.5"
    android:interpolator="@android:anim/linear_interpolator"
    android:pivotX="50%"
    android:pivotY="-90%"
    android:toXScale="1.0"
    android:toYScale="1.0" />

<translate
    android:duration="300"
    android:fromXDelta="-200"
    android:fromYDelta="-200"
    android:toXDelta="0"
    android:toYDelta="0" />

和我的代码:

FragmentTransaction ft = getFragmentManager().beginTransaction();
                ft.setCustomAnimations(R.anim.jump_in, R.anim.jump_out, R.anim.jump_in, R.anim.jump_out);
                ft.add(layer_frag, "layer frag");
                ft.show(layer_frag).commit();//layer_frag is a class whitch extends DialogFragment

我必须错过一些东西,因为它看起来像以前一样.

嗨我需要画一条路径简单的线条到画布它应该用白线写出红色矩形.但它不会画出什么mi缺失.我的代码:

Canvas canvas = new Canvas();


       Paint paint = new Paint();

       paint.setStyle(Paint.Style.FILL);
       paint.setColor(Color.RED);
       canvas.drawPaint(paint);
       Path path = new Path();
       //canvas.drawColor(Color.CYAN);

       for (int i = 5; i < 50; i++) {

           path.moveTo(4, i-1);
           path.lineTo(4, i);

       }
       path.close();

       paint.setStrokeWidth(3);
       paint.setPathEffect(null);
       paint.setColor(Color.WHITE);
       paint.setStyle(Paint.Style.STROKE);

       canvas.drawPath(path, paint);

        for (int i = 0; i < 3; i++) {
            View iview =    inflater.inflate(R.layout.linear_layout, null);
            if(i == 0){
                iview.findViewById(R.id.imageView1).setBackgroundResource(R.drawable.distspeed);
            }
            if(i == 1){
                iview.findViewById(R.id.imageView1).setBackgroundResource(R.drawable.hxmdist);
            }
            if(i == 2){
                iview.findViewById(R.id.imageView1).setBackgroundResource(R.drawable.hxmspeeed);
            }

            iview.draw(canvas);

            realViewSwitcher.addView(iview);
        }

嗨我有问题为我的Button设置多行,这是声明的:

button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.titleLabel.font            = [UIFont systemFontOfSize: 12];
button.titleLabel.lineBreakMode   = UILineBreakModeWordWrap;
button.titleLabel.numberOfLines   = 0;
button.titleLabel.shadowOffset    = CGSizeMake (1.0, 0.0);

[button addTarget:self 
           action:@selector(myButtonClick) 
 forControlEvents:UIControlEventTouchDown];

button.frame = CGRectMake(0.0, 100.0, 317.0, 100.0);
[button setTitle:string forState:UIControlStateNormal]; 
button.titleLabel.font            = [UIFont systemFontOfSize: 12];
button.titleLabel.text = @"ahoj";

NSMutableString *ObratString = [[NSMutableString alloc] initWithString:button.titleLabel.text];

[ObratString appendString:@"\n"];
[ObratString appendString:@"caw"];
[ObratString appendString:@"\n"];
[ObratString appendString:@"helllo"];
button.titleLabel.text = ObratString;
[ObratString release];
[self.view addSubview:button];

但最后我才看到第一行.有没有办法使它工作？

我正在尝试将facebook应用到我的iOS应用程序中用于学校项目但是我遇到了一些障碍,即没有调用fbDidLogin方法.

我创建了一个名为FBFetcher的示例对象,如下所示:

    @interface FBFetcher : NSObject <FBDialogDelegate,FBSessionDelegate,FBRequestDelegate> {
    Facebook *facebook;
    FBFetcher *facebookFetcher; 
}
-(void)login; 
@property (retain) Facebook  *facebook;
@property (retain) FBFetcher *facebookFetcher; 
@end

在FBFetcher.m中:

    @implementation FBFetcher 
@synthesize facebookFetcher,facebook;


-(void)login{
    facebook = [[Facebook alloc] initWithAppId:@"...."]; 
    NSArray *permissions =  [[NSArray arrayWithObjects: @"offline_access",@"user_about_me", nil] retain];
    [facebook authorize:permissions delegate:self];

}

-(void)fbDidLogin {
    NSLog(@"Erfolgreich eingeloggt....");
}

@end

在我的应用代表中:

    -  (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { 

    return [[[controller facebookFetcher] facebook] handleOpenURL:url];
}

我有一个单独的视图控制器,其中n动作绑定到UIButton:

facebookFetcher = [[FBFetcher alloc] init];
[facebookFetcher login]; 

我可以访问登录和授权页面,但fbDidLogin方法永远不会被调用.有什么建议？

嗨,我需要在iphone上使用嘟嘟声,但我发现的唯一一件就是这个

NSString *soundPath = [[NSBundle mainBundle] pathForResource:@"alert" ofType:@"wav"];

    SystemSoundID soundID;

    AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath: soundPath], &soundID);

    AudioServicesPlaySystemSound (soundID);

    [soundPath release]; 

它是工作和良好的代码,但我需要导入alert.wav文件.但我宁愿做本机(内置)声音,如果存在.

谢谢你的所有答案cs.