iOS代码模拟Home+power键实现截屏

导入 #import <AudioToolbox/AudioToolbox.h>

截屏代码如下：

-(void)saveScreen

{

  [selfplaySound];

    CGSize imageSize = [[UIScreenmainScreen] bounds].size;

    if (NULL != &UIGraphicsBeginImageContextWithOptions) {

        UIGraphicsBeginImageContextWithOptions(imageSize,NO, 0);

    }

    else

    {

        UIGraphicsBeginImageContext(imageSize);

    }

    

    CGContextRef context =UIGraphicsGetCurrentContext();

    

    for (UIWindow * windowin [[UIApplicationsharedApplication] windows]) {

        if (![windowrespondsToSelector:@selector(screen)] || [windowscreen] == [UIScreenmainScreen]) {

            CGContextSaveGState(context);

            CGContextTranslateCTM(context, [windowcenter].x, [windowcenter].y);

            CGContextConcatCTM(context, [windowtransform]);

            CGContextTranslateCTM(context, -[windowbounds].size.width*[[windowlayer] anchorPoint].x, -[windowbounds].size.height*[[windowlayer] anchorPoint].y);

            [[window layer]renderInContext:context];

            

            CGContextRestoreGState(context);

        }

    }

    UIImage *image =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(image,self, @selector(imageSavedToPhotosAlbum:didFinishSavingWithError:contextInfo:),nil);

}

- (void)imageSavedToPhotosAlbum:(UIImage *)image didFinishSavingWithError:(NSError *)error contextInfo:(void *)contextInfo

{

    if (!error) {

        _HUD.labelText =@"保存成功";

        _time=1;

    }else

    {

        _HUD.labelText =@"保存失败";

        _time=0;

    }

    [_HUDhide:YESafterDelay:1.0];

}

//模拟播放快门声音加白光

-(void) playSound

{

 

  UIView * view = [[UIView alloc]initWithFrame:[UIScreen mainScreen].bounds];

    view.backgroundColor = [UIColor whiteColor];

    UIWindow * window = [UIApplication sharedApplication].keyWindow;

    [window addSubview:view];

    AudioServicesPlaySystemSound(shake_sound_male_id);

   [ UIView animateWithDuration:0.5 animations:^{

       view.alpha = 0.05;

   } completion:^(BOOL finished) {

       [view removeFromSuperview];

   }];

}

快门声ID如下：

static SystemSoundID shake_sound_male_id =1108;

使用如下方法播放系统声音的ID

AudioServicesPlaySystemSound(shake_sound_male_id);

具体ID连接如下

http://iphonedevwiki.net/index.php/AudioServices