Question

在我的项目中，我需要每分钟自动拍照。但我找不到任何解决方案。

这是我实施的代码，但它不起作用......

我使用NSTimer调用相机每4秒拍照。而且我只需要这个东西

//This method is all for the time setup. You can ignore it.

-(NSDate *)userInfo {

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];

[dateFormatter setDateFormat:@"yyyy-MM-dd 'at' HH:mm:ss"];

NSDate *date = [[[NSDate alloc]init]autorelease];

NSString *formattedDateString = [dateFormatter stringFromDate:date];

NSLog(@"formattedDateString: %@", formattedDateString);   

return date;    
}


- (void)targetMethod:(NSTimer *)theTimer {
   NSDate *startDate = [self userInfo];

   //newly changed lines.
   UIImagePickerController *myPicker;
   [myPicker takePicture];
   NSLog(@"Timer started on %@", startDate);

}


- (IBAction) showCameraUI {


   [NSTimer scheduledTimerWithTimeInterval:4.0
                                 target:self
                               selector: @selector(targetMethod:)
                               userInfo:[self userInfo]
                                repeats:YES];

}

Answer 1

您可以调用UIImagePickerController的{{3}}方法以编程方式拍照。例如，您可以使用计时器每隔一分钟调用一次。

修改

您应首先显示相机界面（更多信息- (void)takePicture;）。您可以在showCameraUI方法中执行此操作。您还应该保留对创建的UIImagePickerController。
的引用
- (IBAction) showCameraUI { UIImagePickerController *picker; // create and display picker self.imagePicker = imagePicker; [NSTimer scheduledTimerWithTimeInterval:4.0 target:self selector: @selector(targetMethod) userInfo:nil repeats:YES]; } - (void)targetMethod { [self.picker takePicture]; // ... }

Answer 2

最后我找到了解决方案。

我使用

 AVCaptureVideoDataOutputSampleBufferDelegate

自动拍照。

- (void)captureOutput:(AVCaptureOutput *)captureOutput didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer   
   fromConnection:(AVCaptureConnection *)connection

这很简单，谢谢@sch同样的帮助：）

Answer 3

也许有点晚，但是piker函数具有属性takePicture

double delayInSecondse = 3.0;
dispatch_time_t epopTime = dispatch_time(DISPATCH_TIME_NOW, delayInSecondse * NSEC_PER_SEC);
dispatch_after(epopTime, dispatch_get_main_queue(), ^(void){
  [picker takePicture];
});

如何在不按uiimagepickercontroller上的拍照按钮的情况下自动拍照？

3 个答案: