小编Shm*_*idt的帖子

所以我有以下代码:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    NSString *CellIdentifier = @"FriendsCell";

    FriendData * fd = [self.friendsDataSource_ objectAtIndex:indexPath.row];

    UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
        cell.selectionStyle = UITableViewCellSelectionStyleNone;
    }

    [cell.imageView  setImageWithURL:[NSURL URLWithString:fd.imageUrl_]];
    [cell.imageView setFrame:CGRectMake(0, 0, 30, 30)];
    [cell.textLabel setText:fd.name_];

    return cell;
}

但是,我没有在单元格中看到imageView.我究竟做错了什么？

我使用UITableView和静态单元格.如果我使用reloadData,比一切都好.

如果我尝试reloadRowsAtIndexPaths它隐藏行.如果我向上拖动tableView(当单元格更新时),则会出现行.

我试了这个没有运气:

        NSData *imageData = UIImageJPEGRepresentation([sight.photo valueForKey:@"image"], 0.8);

        NSString *docsPath = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];

        NSString *filePath = [docsPath stringByAppendingPathComponent:@"sound.m4a"];
        NSURL *fileUrl     = [NSURL fileURLWithPath:filePath];
        NSData *aacData = [sight.sound valueForKey:@"soundrecord"];
        [aacData writeToURL:fileUrl atomically:YES];
        //    NSString *text = self.textField.text;
        NSArray *items = @[imageData, aacData];

我使用Facebook SDK和FBLoginView登录Facebook,我得到了一个基本的用户信息,但我需要更多的权限,如email,birthday.如何添加权限？

Apple拒绝了我的应用,因为:

3.3.1应用程序只能以Apple规定的方式使用Documented API,不得使用或调用任何私有API.应用程序必须最初使用Objective-C,C,C++或JavaScript编写,由iPhone OS WebKit引擎执行,并且只有使用C,C++和Objective-C编写的代码可以编译并直接链接到Documented API(例如,禁止通过中间翻译或兼容性层或工具链接到Documented API的应用程序.

您的应用程序中包含的非公共API是animationDidStop:finished:context:.

这是我使用上述方法调用的方法:

- (void)hideMsg
{

// Slide the view off screen
CGRect frame = self.view.frame;
int retractY;
int retractX;

[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:.75];

retractY = -190;
retractX = 0;

frame.origin.y = retractY;
frame.origin.x = retractX;
self.view.frame = frame;

//to autorelease the Msg, define stop selector
[UIView setAnimationDelegate:self];
[UIView setAnimationDidStopSelector:@selector(animationDidStop:finished:context:)];

[UIView commitAnimations];

}

我正在使用此方法在某个事件发生后显示滑动消息.

但我没有定义这种方法.当我试图找到它时,只能在CAAnimation.h,UIView.h中找到它.

有没有人遇到同样的问题？你怎么修好它的？

所以我有一个应用程序,当前可以使用前置iphone摄像头捕获视频,然后实时处理视频源.但是,我要做的是让这个过程在后台运行并将其他控件放在屏幕上.例如,假设我想运行相机并处理图像输入,但我希望用户看到黑屏,上面有一些按钮.关于如何做到这一点的任何想法？

保存时出现以下错误managedObjectContext:

Terminating app due to uncaught exception 'NSInvalidArgumentException', 
reason: '-[Image count]: unrecognized selector sent to instance

码:

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)selectedImage editingInfo:(NSDictionary *)editingInfo {

// Delete any existing image.
Image *oldImage = _place.image;
if (oldImage != nil) {
    [_place.managedObjectContext deleteObject:oldImage];
}

Image *image = [NSEntityDescription insertNewObjectForEntityForName:@"Image" inManagedObjectContext:_place.managedObjectContext];
image.imageData = UIImageJPEGRepresentation(selectedImage, 0.5);
_place.image = image;
[_place.managedObjectContext save:nil]; //Here is the crash
[self dismissViewControllerAnimated:YES completion:nil];

Image实体有两个一对一的关系:place和trip.

@interface Image : NSManagedObject

@property (nonatomic, retain) NSData …

我喜欢Realm,我喜欢邦德.它们都使应用程序创建成为一种乐趣.所以我想知道连接Realm和Bond的最佳方式是什么？
在领域,我们可以存储基本类型,比如Int,String例如但在债券与我们合作的DynamicS和Bond秒.我发现连接Realm和Bond的唯一方法是:

class TestObject: RLMObject {

   dynamic var rlmTitle: String = ""
   dynamic var rlmSubtitle: String = ""

   var title: Dynamic<String>
   var subtitle: Dynamic<String>

   private let titleBond: Bond<String>!
   private let subtitleBond: Bond<String>!

   init(title: String, subtitle: String) {
      self.title = Dynamic<String>(title)
      self.subtitle = Dynamic<String>(subtitle)

      super.init()

      self.titleBond = Bond<String>() { [unowned self] title in self.rlmTitle = title }
      self.subtitleBond = Bond<String>() { [unowned self] subtitle in self.rlmSubtitle = subtitle } …

我有tmpPixelBuffer像素缓冲区数据的临时变量nil,但是,当检测到元数据对象时,我想从该缓冲区创建图像,因此我可以从该图像中裁剪元数据图像.

图像总是nil,我做错了什么？

func captureOutput(captureOutput: AVCaptureOutput!, didOutputSampleBuffer sampleBuffer: CMSampleBuffer!, fromConnection connection: AVCaptureConnection!) {

    tmpPixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer)
}


func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {

    let image = CIImage(CVPixelBuffer: tmpPixelBuffer)
    let context = CIContext()
    let cgiImage = context.createCGImage(image, fromRect: image.extent())
    let capturedImage = UIImage(CGImage: cgiImage)
    ...
}

我也尝试这样做:

func captureOutput(captureOutput: AVCaptureOutput!, didOutputMetadataObjects metadataObjects: [AnyObject]!, fromConnection connection: AVCaptureConnection!) {

    let image = CIImage(CVPixelBuffer: tmpPixelBuffer)
    let context = CIContext(options: nil)

    let cgiImage = context.createCGImage(image, fromRect: …

试图创建一个视图UITextField,并UILabel超越它.以下代码有什么问题？

- (UIView *)tableHeaderView{
    NSArray *constraints;
    UIView *view = [[UIView alloc]initWithFrame:(CGRect){0,0,self.view.frame.size.width, 88}];

    UITextField *tf = [[UITextField alloc]init];
    tf.borderStyle = UITextBorderStyleRoundedRect;
    tf.text = _filter.name;
    [view addSubview:tf];

    UILabel *titleLabel = [[UILabel alloc] init];
    titleLabel.textAlignment = NSTextAlignmentCenter;
    titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
    titleLabel.text = [NSString stringWithFormat:NSLocalizedString(@"Found results: %d", nil), _filter.resultsCount];
    [view addSubview:titleLabel];

    constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"|-[titleLabel]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(titleLabel)];
    [view addConstraints:constraints];

    constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"|-[tf]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(tf)];
    [view addConstraints:constraints];

    constraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[titleLabel]-8-[tf]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(titleLabel, tf)];
    [view addConstraints:constraints];
} …