Question

我正在尝试在默认摄像机视图上实现一个按钮，该按钮会在录制后打开照片库。现在我实现了一个显示按钮的自定义覆盖视图类，但UIImagePicker没有呈现或不可见（由多个视图覆盖）。

CameraOverlayView.h

#import <UIKit/UIKit.h>

@interface CameraOverlayView : UIView <UIImagePickerControllerDelegate, UINavigationControllerDelegate>
{}
- (UIViewController *)viewController;
- (void) button1:(UIButton *)paramSender;
@end

CameraOverlayView.m

#import "CameraOverlayView.h"


@implementation CameraOverlayView


- (id)initWithFrame:(CGRect)frame {

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

        //add a simple button to the overview
        //with no functionality at the moment
        UIButton *button = [UIButton
                            buttonWithType:UIButtonTypeRoundedRect];
        [button addTarget:self
                   action:@selector(button1:)
         forControlEvents:UIControlEventTouchUpInside];
        [button setTitle:@"Select" forState:UIControlStateNormal];

        CGPoint buttonOffset = CGPointMake( ([[UIScreen mainScreen] bounds].size.width - button.frame.size.width) / 2, ([[UIScreen mainScreen] bounds].size.height - button.frame.size.height) / 2);

        button.frame = CGRectMake(buttonOffset.x, buttonOffset.y, 400, 50);
        [self addSubview:button];
    }
    return self;
}

- (void) button1:(UIButton *)paramSender{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;

    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;

    [self.viewController presentViewController:picker animated:YES completion:nil];
    //debugging
    NSLog(@"sup!");
}

//find the first responder to access the UIViewController
- (UIViewController *)viewController {
    if ([self.nextResponder isKindOfClass:UIViewController.class])
        return (UIViewController *)self.nextResponder;
    else
        return nil;
}

请注意，当我运行代码时没有错误，“选择”按钮显示正确。当我点击按钮时，它会显示NSLog消息，但不会打开照片库。有谁知道这里的问题是什么？

谢谢！

UIImagePicker没有显示

0 个答案: