UIImagePickerController 和空白 ImageView答案

【问题标题】：UIImagePickerController and blank ImageViewUIImagePickerController 和空白 ImageView
【发布时间】：2014-07-11 18:19:52
【问题描述】：

我有一个非常奇怪的问题：我有一个 TableViewController 有 2 个图片和 2 个按钮。用户可以使用按钮更改图片。

问题是当用户单击按钮时，UIActionSheet 打开，用户选择“照片来自库”，然后在库中选择一张照片。 UIActionSheet 关闭，但我的 ImageView 中没有图片...它仍然是空白的...（我的 ImageView 链接到 @ 属性）。

这是我的代码：

.H 文件：

#import <UIKit/UIKit.h>

@interface EditUserTableViewController : UITableViewController <UITextFieldDelegate, UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>

@property (weak, nonatomic) IBOutlet UIImageView *avatar;
@property (weak, nonatomic) IBOutlet UIImageView *coverPhoto;

- (IBAction)changeImage:(id)sender;

@end

.M 文件：

#import "EditUserTableViewController.h"

typedef NS_ENUM(NSInteger, THPhotoType)
{
    THPhotoTypeCoverPhoto = 10,
    THPhotoTypeAvatarPhoto = 20
};

@interface EditUserTableViewController ()

@property (nonatomic, assign) THPhotoType selectedPhotoType;

@end

@implementation EditUserTableViewController

@synthesize coverPhoto, avatar;

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];    
} 

- (IBAction)changeImage:(id)sender {
    if ([sender isKindOfClass:[UIButton class]]) {
        UIButton *button = sender;
        _selectedPhotoType = button.tag;
    }
    UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Select Picture" delegate:self cancelButtonTitle:@"Cancel" destructiveButtonTitle:nil otherButtonTitles:@"From Library", @"From Camera", nil];
    [sheet showInView:self.view];
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex < 2) {
        UIImagePickerController * imagePicker = [[UIImagePickerController alloc] init];
        UIImagePickerControllerSourceType type;

        switch (buttonIndex) {
            case 0:
                type = UIImagePickerControllerSourceTypePhotoLibrary;
                break;
            case 1:
                type = UIImagePickerControllerSourceTypeCamera;
                break;

            default:
                break;
        }

        imagePicker.sourceType = type;
        imagePicker.delegate = self;

        [self presentViewController:imagePicker animated:YES completion:^{ }];
    }
}

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

    switch (_selectedPhotoType) {
        case THPhotoTypeCoverPhoto:
            coverPhoto.image = [info objectForKey:UIImagePickerControllerOriginalImage];
            break;
        case THPhotoTypeAvatarPhoto:
            avatar.image = [info objectForKey:UIImagePickerControllerOriginalImage];
            break;
        default:
            break;
    }

    [self dismissViewControllerAnimated:YES completion:^{ }];
}

@end

【问题讨论】：

标签： ios uitableview uiimageview uiimagepickercontroller

【解决方案1】：

将图像设置为图像视图似乎有问题。试试这个

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

    switch (_selectedPhotoType) {
        case THPhotoTypeCoverPhoto:
          self.coverPhoto.image = [info objectForKey:UIImagePickerControllerOriginalImage];
            break;
        case THPhotoTypeAvatarPhoto:
           self.avatar.image = [info objectForKey:UIImagePickerControllerOriginalImage];
            break;
        default:
            break;
    }

[self dismissViewControllerAnimated:YES completion:^{ }];

}

【讨论】：

【解决方案2】：

好吧，我是“%^&*&^”...

这是我的按钮标签的问题...

问题解决了！

【讨论】：