小编max*_*nev的帖子

这有可能让我所有的朋友都喜欢吗？现在,我通过两个步骤得到这个:

1. 得到我所有朋友的名单
2. 通过迭代这些列表我得到所有人喜欢,

但这似乎是一个非常大的过程,任何人都有想法改善这项任务的性能？

我使用以下ViewController.m创建了一个新项目.当我运行应用程序时,我可以看到一个预期的原点/大小的框(38,100,250,163),但它是黑色的,没有视频播放.Xcode中有一个奇怪的输出:

2012-08-23 15:36:45.559 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay for pause
2012-08-23 15:36:45.560 VideoTest1[11398:c07] [MPAVController] Autoplay: Disabling autoplay
2012-08-23 15:37:18.186 VideoTest1[11398:c07] [MPAVController] Autoplay: Skipping autoplay, disabled (for current item: 1, on player: 0)

请注意,视频使用Videora iPhone Converter进行转换,并在Xcode中播放正常(因此不会出现视频问题); 视频的路径是可以的,因为当我指定demo-iPhone1(不存在)时,我得到一个零例外.我试过在模拟器和iPhone上:总是黑盒子.有任何想法吗？

#import "ViewController.h"
#import <MediaPlayer/MediaPlayer.h>  

@interface ViewController ()

@end

@implementation ViewController
- (void)moviePlaybackComplete:(NSNotification *)notification
{
    MPMoviePlayerController *moviePlayerController = [notification object];
    [[NSNotificationCenter defaultCenter] removeObserver:self
                                                    name:MPMoviePlayerPlaybackDidFinishNotification
                                                  object:moviePlayerController];

    [moviePlayerController.view removeFromSuperview];
}


- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a …

我想缩放+翻译视图,然后将此转换动画回来.但是CGAffineTransformInvert返回一个不同的变换(无法理解它的逻辑).

#import <UIKit/UIKit.h>
@interface TestView : UIView {
    UIView *view;
    CGAffineTransform transform;
}
@end


#import "TestView.h"
#import <QuartzCore/QuartzCore.h>
@implementation TestView
- (void)testAnimation:(NSString*)animationID finished:(NSNumber*)finished context:(void*)context {
    CGAffineTransform transformInverted = CGAffineTransformInvert(transform);
    [UIView beginAnimations:@"test2" context:NULL];
    [UIView setAnimationDuration:3.0];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    view.transform = transformInverted;
    [UIView commitAnimations];
}

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        view = [[UIView alloc] initWithFrame:CGRectMake(150, 150, 100, 100)];
        view.backgroundColor = [UIColor greenColor];
        [self addSubview:view];

        CGAffineTransform transform1 = CGAffineTransformTranslate(view.transform, -150, -150); 
        transform = CGAffineTransformScale(transform1, (float)1/2, (float)1/2); …