当通过AVAssetImageGenerator获取视频的UIImage时,当视频以纵向方向拍摄时,我会返回旋转的图像(技术上它们不是).如何判断视频的拍摄方向,然后正确旋转图像?
AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:url options:nil];
AVAssetImageGenerator *generate = [[AVAssetImageGenerator alloc] initWithAsset:asset];
NSError *err = NULL;
CMTime time = CMTimeMake(0, 60);
CGImageRef imgRef = [generate copyCGImageAtTime:time actualTime:NULL error:&err];
[generate release];
UIImage *currentImg = [[UIImage alloc] initWithCGImage:imgRef];
Run Code Online (Sandbox Code Playgroud) select *
from table
where date > '2010-07-20 03:21:52'
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我希望不会给我任何结果...除了我得到一个日期时间为的记录 2010-07-20 03:21:52.577
如何使查询忽略毫秒?
我正在开发一个通用应用程序,我正试图在iPhone和iPad版本之间共享尽可能多的代码.我需要使用一个TabBarController作为我的根视图控制器,虽然我想每个选项卡的使用SplitViewController,SplitViewController的文档说,它需要的根视图控制器.因此,考虑到所有这些 - 了解我正在尝试并排放置两个导航控制器,并且(大部分)复制SplitViewController的行为/布局.
一切都很好,除了视图的布局.当应用程序以纵向模式启动时,一切都会在设备方向改变时正常运行并调整大小/位置.

如果应用程序以UIDeviceOrientationPortrait以外的任何方向启动,则视图将在导航控制器上方显示20点间隙/边距.我试过在运行时调整帧没有完美的结果.将框架的origin.y调整为-20并将高度增加20会使视图与其父级的顶部齐平,但在底部留下20个点的间隙!

CGContextSetFillColorWithColor:无效的上下文0x0.这是一个严重的错误.该应用程序或其使用的库正在使用无效的上下文,从而导致系统稳定性和可靠性的整体降低.此通知是礼貌的:请解决此问题.它将成为即将到来的更新中的致命错误.
我从这个方法的[color setFill]行得到了错误.关于如何解决它的任何想法?
+ (UIImage *)fillImage:(UIImage*)image withColor:(UIColor *)color
{
// begin a new image context, to draw our colored image onto
UIGraphicsBeginImageContextWithOptions(image.size, NO, [[UIScreen mainScreen] scale]);
// get a reference to that context we created
CGContextRef context = UIGraphicsGetCurrentContext();
// set the fill color
[color setFill];
// translate/flip the graphics context (for transforming from CG* coords to UI* coords
CGContextTranslateCTM(context, 0, image.size.height);
CGContextScaleCTM(context, 1.0, -1.0);
// set the blend mode to overlay, and the original image
CGContextSetBlendMode(context, kCGBlendModeOverlay);
CGRect rect …Run Code Online (Sandbox Code Playgroud) http://www.irovr.com/stackOverflow/overlap.png
- (void)viewDidLoad {
[super viewDidLoad];
[self setWantsFullScreenLayout:YES];
[mainScrollView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onMainScrollTap:)]];
}
- (void)onMainScrollTap:(id)sender {
if(self.navigationController.navigationBar.hidden){
[self.navigationController setNavigationBarHidden:NO animated:YES];
[self.navigationController setToolbarHidden:NO animated:NO];
[[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationFade];
}else{
[self.navigationController setNavigationBarHidden:YES animated:YES];
[self.navigationController setToolbarHidden:YES animated:YES];
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
}
}
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleBlackTranslucent];
[[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationFade];
self.navigationController.navigationBar.translucent = YES;
self.navigationController.toolbar.translucent = YES;
}
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
[self.navigationController setNavigationBarHidden:YES animated:YES];
[self.navigationController setToolbarHidden:YES animated:YES];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleDefault]; …Run Code Online (Sandbox Code Playgroud) 我有一个自定义的UIView子类.在IB中,我指定了一个"占位符"UIView并将该类设置为我的类名.我对drawRect方法的重写是有效的,并且背景正确着色,但是initWithFrame没有触发.为什么?
- (id)initWithFrame:(CGRect)frame {
NSLog(@"initWithFrame");
if ((self = [super initWithFrame:frame])) {
noteTextFont = [[UIFont boldSystemFontOfSize:12] retain];
}
return self;
}
- (void)drawRect:(CGRect)rect {
[super drawRect:rect];
CGContextRef context = UIGraphicsGetCurrentContext();
UIColor *backgroundColor = [UIColor blackColor];
[backgroundColor set];
CGContextFillRect(context, rect);
UIColor *labelColor = [UIColor lightGrayColor];
[labelColor set];
[notificationLabel drawInRect:CGRectMake(44, 18, rect.size.width-20, rect.size.height) withFont:noteTextFont lineBreakMode:UILineBreakModeTailTruncation];
[self setNeedsLayout];
}
Run Code Online (Sandbox Code Playgroud) 我希望能够构建和安装我的应用程序的多个版本(同时),针对不同的环境,如开发,暂存和生产.
包中的名称AndroidManifest.xml似乎是这里的主要障碍,因为它是唯一标识应用程序的内容.我认为这将是可以简单地切换com.mydomain.prod,com.mydomain.staging并且com.mydomain.dev或某种类似的规定,但到目前为止我没有运气来了与此方法适用的封装结构.
我可以采用什么策略以尽可能少的痛苦来做到这一点?
我很难过.我有这个集合视图显示单元格的边缘作为滑动可用的提示,但只有第一个和最后一个单元格正确显示.介于两者之间的一切都没有正确排队.我错过了什么?
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
layout.itemSize = CGSizeMake(280, 400);
layout.sectionInset = UIEdgeInsetsMake(0, 20, 0, 20);
layout.minimumInteritemSpacing = 10;
layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
layout.minimumLineSpacing = 10.0;
self.collectionView.collectionViewLayout = layout;
self.collectionView.showsHorizontalScrollIndicator = NO;
self.collectionView.pagingEnabled = YES;
self.collectionView.clipsToBounds = NO;
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ios uicollectionview uicollectionviewcell uicollectionviewlayout
我正处于这个问题的最后阶段.我在我的应用程序看似随机的地方收到此错误.Raven从几十个地方报道他们,但我只能在当地复制一对.在我看来,问题与解析JSON响应有关,但响应是有效的.
在我的Angular服务中......
...
getThread: function(id, success, error) {
$http.get('/message/'+id).success(function(data){
success(data);
}).error(error);
}
...
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在我的Express控制器中......
...
res.json(mssgs);
...
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这是一个示例响应......
[
{
"id": 79,
"body": "test",
"senderArchived": false,
"recipientArchived": false,
"createdAt": "2014-04-17T01:44:46.762Z",
"updatedAt": "2014-04-17T01:44:46.762Z",
"RootMessageId": 69,
"SenderId": 164050,
"RecipientId": 154040,
"sender": {
"username": "boca",
"id": 164050,
"primaryMedium": null
},
"recipient": {
"username": "quimby",
"id": 154040,
"primaryMedium": {
"id": "186",
"type": "image",
"nativeURL": "https://domain/imageurl.jpg",
"mediumURL": "https://domain/imageurl.jpg",
"smallURL": "https://domain/imageurl.jpg",
"createdAt": "2014-04-21T15:52:10.927Z",
"updatedAt": "2014-04-21T15:52:10.947Z",
"CommentId": null,
"EventId": null,
"UserId": 154040,
"PostId": null,
"MessageId": null,
"MediaFolderId": …Run Code Online (Sandbox Code Playgroud) ios ×4
iphone ×4
objective-c ×3
cocoa-touch ×2
android ×1
angularjs ×1
avfoundation ×1
express ×1
flutter ×1
ipad ×1
json ×1
sql-server ×1
t-sql ×1
xcode ×1