Question

在我的测试应用程序中，我有两个按钮（takePhoto1和takePhoto2）和两个UIImageViews（photo1View和photo2View）。第一个按钮拍摄照片并在第一个图像视图中显示。第二个按钮拍摄另一张照片，并且应该在第二张图像视图中显示它。但是，出于某种原因，第二张照片显示在photoView1而不是photoView2中。

我还没有实现任何代码来保存照片，所以我并不担心照片中的照片会一直存在。

我需要弄清楚的是如何确保拍摄第二张照片时，它会显示在相应的视图中。以下是我到目前为止的情况：

//Take photo1 and display in top image view
- (void)takePhoto1;
{
    [self dismissViewControllerAnimated:YES completion:NULL];

    if ([self.capturedImages count] > 0)
    {
        if ([self.capturedImages count] == 1)
        {
            // Camera took a single picture.
            [self.photo1View setImage:[self.capturedImages objectAtIndex:0]];
        }
        // To be ready to start again, clear the captured images array.
        [self.capturedImages removeAllObjects];
    }

    self.imagePickerController = nil;
}




//Take photo2 and display in bottom image view
- (void)takePhoto2;
{
    [self dismissViewControllerAnimated:YES completion:NULL];

    if ([self.capturedImages count] > 0)
    {
        if ([self.capturedImages count] == 1)
        {
            // Camera took a single picture.
            [self.photo2View setImage:[self.capturedImages objectAtIndex:1]];
        }
        // To be ready to start again, clear the captured images array.
        [self.capturedImages removeAllObjects];
    }

    self.imagePickerController = nil;
}

任何人都知道如何解决这个问题？

Answer 1

检查故事板或xib以查看＆＃34; photo2View＆＃34;真的与你的插座有关。

我怀疑UIImageView for＆＃34; photo1View＆＃34;也连接到＆＃34; photo2View＆＃34;。

P.S。您还应该在@implementation中更改此行：

- (void)takePhoto2;

到此：

- (void)takePhoto2

分号只应在.h文件中的方法声明之后出现。

Answer 2

您的代码是否有效？我发现了两个问题 -

问题1 - 这应该会崩溃，因为capturedImages根据第二个if检查有一个元素，但是在设置imageView时您正在访问数组中的第二个元素。

if ([self.capturedImages count] == 1)
        {
            // Camera took a single picture.
            [self.photo2View setImage:[self.capturedImages objectAtIndex:1]];

问题2 - 由于您正在清除self.capturedImages，因此应该抛出第二种方法中的异常。

[self.photo2View setImage:[self.capturedImages objectAtIndex:1]];

Answer 3

我看到你的问题无法帮助我自己解决问题。如果我遇到与你相同的问题，我会以这种方式解决它：

考虑一下，按钮的标签与imageView标签相同。

#import "ViewController.h"

@interface ViewController ()
- (IBAction)takePhoto:(id)sender;

@property (strong, nonatomic) IBOutletCollection(UIImageView) NSArray *imageViews;

@property int tag;
@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)takePhoto:(id)sender {
    _tag = ((UIButton *)sender).tag;
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];
    imagePickerController.delegate = self;
    [self presentViewController:imagePickerController animated:YES completion:nil];


}

#pragma mark - UIImagePickerDelegate Methods
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(NSDictionary *)editingInfo{
    [picker dismissViewControllerAnimated:NO completion:nil];

    [[self getImageView:_tag] setImage:image];

}

- (UIImageView *) getImageView : (int) tag{
    for (UIImageView *imageView in _imageViews) {
        if (imageView.tag == tag) {
            return imageView;
        }
    }
    return nil;
}


@end

您可check this as working project here。

Answer 4

您是否正确连接按钮1以拍摄照片1和按钮2拍摄照片2？也许按钮2也在做takePhoto1？

在不同的UIImageViews中显示照片

4 个答案: