如何用从 ImagePickerController 拍摄的照片替换 UIButton 图像

Posted 2023-03-21

【中文标题】如何用从 ImagePickerController 拍摄的照片替换 UIButton 图像

【英文标题】：How to replace a UIButton image with a photo taken from ImagePickerController

【发布时间】：2014-07-21 00:20:09

【问题描述】：

我创建了一个按钮，按下该按钮会调出相机。用户应该拍照，然后这张照片应该替换按钮的图像。但是，相机拍摄照片，当它被关闭时，按钮的图像保持不变，这是我的代码 sn-p：

- (void)viewDidLoad

    [super viewDidLoad];
    [self.usernameField becomeFirstResponder];
    UIButton *uploadPhotobutton = [UIButton buttonWithType:UIButtonTypeCustom];

    [uploadPhotobutton setImage:[UIImage imageNamed:@"uploadphotoicon"] forState:UIControlStateNormal];

    uploadPhotobutton.frame = CGRectMake(0, 0, 80, 80);

    uploadPhotobutton.clipsToBounds = YES;

    uploadPhotobutton.layer.cornerRadius = 80/2.0f;
    uploadPhotobutton.layer.borderColor = [UIColor colorWithRed:.102 green:.737 blue:.612 alpha:1.0].CGColor;
    uploadPhotobutton.layer.borderWidth = 2.0f;

    [self.view addSubview:uploadPhotobutton];
    [uploadPhotobutton setCenter:CGPointMake(160, 128)];
    [uploadPhotobutton addTarget:self action:@selector(uploadPhotoButton:)     forControlEvents:UIControlEventTouchUpInside];


-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 

    UIImage *userImage = [info objectForKey:UIImagePickerControllerOriginalImage];
    [uploadPhotoButton setImage:userImage forState:UIControlStateNormal];
    [self.navigationController dismissViewControllerAnimated:YES completion:NULL];

知道问题出在哪里吗？

【问题讨论】：

您的问题不是按钮图像而是按钮本身。这段代码甚至无法编译。

@Desdenova 代码编译运行，按钮调出摄像头，唯一的就是按钮上没有替换图片。

【参考方案1】：

是在

中声明的uploadPhotoButton

-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 

与uploadPhotoButton中的一样

- (void)viewDidLoad

?

也许不是！