Iphone UIImagePickerController startVideoCapture和自定义覆盖

我正在使用带有自定义覆盖的UIImagePickerController在我的应用程序中录制视频。对于UIImagePickerController的实现，我使用了

我已经隐藏了相机的控件，并创建了一个简单的自定义覆盖视图。这已经起作用了，负载也很好。 然后，我为视图创建了一个工具栏和按钮，用于录制视频：

- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller
                               usingDelegate: (id <UIImagePickerControllerDelegate,
                                               UINavigationControllerDelegate>) delegate {

if (([UIImagePickerController isSourceTypeAvailable:
      UIImagePickerControllerSourceTypeCamera] == NO)
    || (delegate == nil)
    || (controller == nil))
    return NO;


UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;

// Displays a control that allows the user to choose movie capture
cameraUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];

// Hides the controls for moving & scaling pictures, or for
// trimming movies. To instead show the controls, use YES.
cameraUI.allowsEditing = NO;

cameraUI.delegate = delegate;

//Overlay view and toolbar setup 
// creating overlayView
UIView* overlayView = [[UIView alloc] initWithFrame:cameraUI.view.frame];
// letting png transparency be
float width = 320;
float AR = (4.0/3.0);

float toolbar_height = 480 - (AR*width);


UIToolbar *toolBar=[[UIToolbar alloc]initWithFrame:CGRectMake(0, (AR*width), 320, toolbar_height)];
//toolBar.tintColor = [UIColor colorWithRed:(252/255.) green:(0/255.) blue:(48/255.) alpha:1];
toolBar.tintColor = [UIColor colorWithRed:(49/255.) green:(52/255.) blue:(49/255.) alpha:1];


UIBarButtonItem *flexibleSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
UIBarButtonItem *RecordBarButtonItem = [[UIBarButtonItem alloc ] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(recordPressed:)];
UIBarButtonItem *CancelBarButtonItem = [[UIBarButtonItem alloc ] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(imagePickerControllerDidCancel:)];
NSArray *buttons = [NSArray arrayWithObjects: CancelBarButtonItem, flexibleSpace, RecordBarButtonItem, flexibleSpace, nil];
[toolBar setItems: buttons animated:NO];

[overlayView addSubview:toolBar];
[overlayView.layer setOpaque:NO];
overlayView.opaque = NO;

cameraUI.showsCameraControls = NO;
cameraUI.cameraOverlayView = overlayView;

[controller presentViewController: cameraUI animated: YES completion:nil];
return YES;
}

因此“lets record”出现在日志上，但我收到startVideoCapture的NSInvalidArgumentException错误。我知道我试图通过按下按钮来开始视频捕获的方式有明显的问题，但我想不出来。还是个iOS新手，所以如果解决方案简单，请原谅我！ 干杯

---

Mike

事实上，我刚刚在打开的一些代码中快速测试了它，您按下按钮时的

发送方

是

uibarbuttoneim*

。所以有两件事你可以做，你可以从根本上

UIBarButtonItem *senderButton = (UIBarButtonItem *)sender; 
if(senderButton.image == UIBarButtonSystemItemCamera)
{
   //Handle behaviour
}

---

或者为每个按钮设置

tag

变量，并跳过图像检查，转而查看标记，这可能会使逻辑变得更简单。

问题在于，附加到

initWithBarButtonSystemItem

调用的操作不会传递

UIImagePickerController

实例

我要做的是将UIImagePickerController设置为类的属性，并通过操作访问该属性，如下所示：

在您的.h中：

@property (nonatomic, strong) UIImagePickerController *cameraUI;

在您的.m中：

- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller
                           usingDelegate: (id <UIImagePickerControllerDelegate,
                                           UINavigationControllerDelegate>) delegate {

    ...

    self.cameraUI = [[UIImagePickerController alloc] init];

    ...

    UIBarButtonItem *RecordBarButtonItem = [[UIBarButtonItem alloc ] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(recordPressed)]; // Removed the ':'

    ...
}


- (void) recordPressed {
    NSLog(@"lets record");
    [self.cameraUI startVideoCapture]; 
}

-（BOOL）startCameraControllerFromViewController:（UIViewController*）控制器
usingDelegate:（id）delegate{
...
self.cameraUI=[[UIImagePickerController alloc]init]；
...
UIBarButtonItem*RecordBarButtonItem=[[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera目标：自我操作：@selector（recordPressed）]；//删除了“：”
...
}
-（作废）记录已按下{
NSLog（@“lets record”）；
[self.cameraUI startVideoCapture]；
}

如果将

-（void）recordPressed:（UIImagePickerController*）picker

更改为

-（void）recordPressed:（id）sender

并执行

NSLog（@“What's:%@”，sender）

它可能会显示您是否正在传递

UIImagePickerController

或其他内容。。但是你可以用它来做视频，我很乐意！很高兴这有帮助：）

- (BOOL) startCameraControllerFromViewController: (UIViewController*) controller
                           usingDelegate: (id <UIImagePickerControllerDelegate,
                                           UINavigationControllerDelegate>) delegate {

    ...

    self.cameraUI = [[UIImagePickerController alloc] init];

    ...

    UIBarButtonItem *RecordBarButtonItem = [[UIBarButtonItem alloc ] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera target:self action:@selector(recordPressed)]; // Removed the ':'

    ...
}


- (void) recordPressed {
    NSLog(@"lets record");
    [self.cameraUI startVideoCapture]; 
}