Question

对于我的应用我想创建一个自定义相机覆盖并创建一个UIImagePickerController来开始录制视频。（下同）

- (IBAction)RecordVideo:(UIButton *)sender {

    //initialise camera view
    UIImagePickerController *cameraUI = [[UIImagePickerController alloc] init];
    cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
    cameraUI.cameraDevice = UIImagePickerControllerCameraDeviceFront;
    cameraUI.showsCameraControls = NO;
    cameraUI.navigationBarHidden = YES;
    cameraUI.toolbarHidden = YES;

    OverlayView *overlay = [[OverlayView alloc]
                        initWithFrame:CGRectMake(0, 0, 20,20)];

    cameraUI.cameraOverlayView = overlay;

    [self presentViewController:cameraUI animated:YES completion:nil];
}

作为cameraOverlayView的一部分，我实例化了一个UIButton：

- (id)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        //clear the background color of the overlay
        self.opaque = NO;
        self.backgroundColor = [UIColor clearColor];

        ... some overlay UI stuff


        UIButton *captureBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        UIImage *captureBtnImg = [UIImage imageNamed:@"captureBtn.png"];
        [captureBtn setBackgroundImage:captureBtnImg forState:UIControlStateNormal];
        captureBtn.frame = CGRectMake(self.frame.size.width/2 - 15,
                                      430,
                                      80,
                                      80);
        [self addSubview:captureBtn];
    }
    return self;
}

那么如何为此按钮创建IBAction，然后可以UIImagePickerController cameraUI开始录制？

如果有人也可以向我解释如何通过特定按钮调用IBActions，那也是惊人的，因为这对我来说似乎是黑魔法？

Answer 1

你可以添加这样的目标，

[captureBtn addTarget:self action:@selector(captureBtnclick:) forControlEvents:UIControlEventTouchUpInside];

你的行动方法应该是这样的

-(void)captureBtnclick :(UIButton*)sender{

//handle your task on click here

}

为什么要在其上添加图层？您可以通过设置类似

的媒体类型来使用来自imagePicker的默认视频录制

cameraUI.mediaTypes = [[NSArray alloc] initWithObjects: (NSString *) kUTTypeMovie, nil];

更新参与评论

您可以使用按钮点击，

 [picker startVideoCapture]; //in your case cameraUI i think

更新2 ：

你的.h文件中的

，

@property UIImagePickerController *cameraUI;

然后在你的方法RecordVideo中使用like，

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

 //etc.....

通过这种方式，您可以camaraUI

在整个班级中使用self

希望这会有所帮助：）

xCode创建UIImagePickerController并引用它

1 个答案: