Ios XCode UIActionSheet图像

我正在创建一个

ui按钮

，当用户单击它时，相机应该会弹出并允许用户拍照。我决定添加一个

UIActionSheet

，它允许用户选择是从相册中选择照片，还是使用相机拍照。在我添加操作表之前，按钮工作正常，当用户塑造照片时，按钮的背景图像被

UIImagePicker

拍摄的照片所取代。但是在我添加了操作表之后，

ui按钮

图像并没有被从

ui图像采集器

或用户照片库中拍摄的图像所取代

这是相关代码

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = YES;
[self.navigationItem setHidesBackButton:NO];

[self.usernameField becomeFirstResponder];
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)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:^{ }];
}

 }
 - (IBAction)signupDone:(id)sender {
     NSString *username = [self.usernameField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
NSString *password = [self.passwordField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];

if ([username length] == 0 || [password length] == 0 /*|| [email length] == 0*/){
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Oops!" message:@"Please enter a username, password, and email!" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
     [alertView show];
}
else {
    PFUser *newUser = [PFUser user];
    newUser.username = username;
    newUser.password = password;

    [newUser signUpInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
        if (error) {
            UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry" message:[error.userInfo objectForKey:@"error"] delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
            [alertView show];
        }
        else {
            [self.navigationController popToRootViewControllerAnimated:YES];
        }
    }];

  }



  }
  -(IBAction)uploadPhotoButton:(id)sender {

UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Select Photo" delegate:self cancelButtonTitle:@"Nevermind" destructiveButtonTitle:nil otherButtonTitles:@"From Library", @"From Camera", nil];
[sheet showInView:self.view];



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


uploadPhotoButton = [UIButton buttonWithType:UIButtonTypeCustom];


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];


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



[self uploadImage];

-（void）视图将显示：（BOOL）动画{
[超级视图将显示：动画]；
self.navigationController.navigationBarHidden=是；
[self.navigationItem setHidesBackButton:否]；
[self.usernameField成为第一响应者]；
uploadPhotoButton=[UIButton按钮类型：UIButtonTypeCustom]；
[uploadPhotoButton setImage:[UIImage ImageName:@“uploadphotoicon”]用于状态：UIControlStateNormal]；
uploadPhotoButton.frame=CGRectMake（0,0,80,80）；
uploadPhotoButton.clipsToBounds=是；
上传PhotoButton.layer.cornerRadius=80/2.0f；
uploadPhotoButton.layer.borderColor=[UIColor COLOR WITHRED:.102绿色：.737蓝色：.612 alpha:1.0]。CGColor；
上传PhotoButton.layer.borderWidth=2.0f；
[self.view addSubview:uploadPhotoButton]；
[上传PhotoButton设置中心：CGPointMake（160128）]；
[uploadPhotoButton添加目标：自我操作：@选择器（uploadPhotoButton:）用于控制事件：UIControlEventTouchUpInside]；
-（无效）操作表：（UIActionSheet*）操作表单击按钮索引：（NSInteger）按钮索引{
如果（按钮索引<2）{
UIImagePickerController*imagePicker=[[UIImagePickerController alloc]init]；
UIImagePickerController资源类型；
开关（按钮索引）{
案例0：
类型=UIImagePickerControllerSourceTypePhotoLibrary；
打破
案例1：
类型=UIImagePickerControllerSourceTypeCamera；
打破
违约：
打破
}
imagePicker.sourceType=类型；
imagePicker.delegate=self；
[self-presentViewController:imagePicker动画：是完成：^{}]；
}
}
-（iAction）注册完成：（id）发件人{
NSString*username=[self.usernameField.text stringByTrimmingCharactersInSet:[NSCharacterSet-whitespaceAndNewlineCharacterSet]]；
NSString*password=[self.passwordField.text stringByTrimmingCharactersInSet:[NSCharacterSet-whitespaceAndNewlineCharacterSet]]；
如果（[username length]==0 | |[password length]==0/*| |[email length]==0*/）{
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“Oops！”消息：@“请输入用户名、密码和电子邮件！”代理：nil cancelButtonTitle:@“确定”其他按钮：nil，nil]；
[警报视图显示]；
}
否则{
PFUser*newUser=[PFUser]；
newUser.username=用户名；
newUser.password=密码；
[newUser signupinbackgroundithblock:^（BOOL成功，NSError*错误）{
如果（错误）{
UIAlertView*alertView=[[UIAlertView alloc]initWithTitle:@“对不起”消息：[error.userInfo objectForKey:@“error”]委托：nil cancelButtonTitle:@“确定”其他ButtonTitles:nil，nil]；
[警报视图显示]；
}
否则{
[self.navigationController-popToRootViewControllerAnimated:是]；
}
}];
}
}
-（iAction）上传照片按钮：（id）发送者{
UIActionSheet*sheet=[[UIActionSheet alloc]initWithTitle:@“选择照片”委托：自取消按钮：@“无终止”销毁按钮：无其他按钮：@“来自库”，“来自相机”，无]；
[图纸显示视图：self.view]；
}
-（void）imagePickerController:（UIImagePickerController*）picker未使用信息完成PickingMediaWithInfo:（NSDictionary*）信息{
uploadPhotoButton=[UIButton按钮类型：UIButtonTypeCustom]；
uploadPhotoButton.frame=CGRectMake（0,0,80,80）；
uploadPhotoButton.clipsToBounds=是；
上传PhotoButton.layer.cornerRadius=80/2.0f；
uploadPhotoButton.layer.borderColor=[UIColor COLOR WITHRED:.102绿色：.737蓝色：.612 alpha:1.0]。CGColor；
上传PhotoButton.layer.borderWidth=2.0f；
[self.view addSubview:uploadPhotoButton]；
[上传PhotoButton设置中心：CGPointMake（160128）]；
[uploadPhotoButton添加目标：自我操作：@选择器（uploadPhotoButton:）用于控制事件：UIControlEventTouchUpInside]；
userImage=[info objectForKey:UIImagePickerControllerEditedImage]；
[上载PhotoButton setImage:userImage for状态：UIControlStateNormal]；
[self.navigationController dismissViewControllerAnimated:是完成：NULL]；
[自上传图像]；

您不需要再创建一个按钮

您只需在界面中声明uploadPhotoButton，以便在此控制器中全局使用，并替换以下方法即可：

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

    [picker dismissViewControllerAnimated:YES completion:NULL];      
    UIImage *chosenImage = info[UIImagePickerControllerOriginalImage];

    [uploadPhotoButton setImage:chosenImage  forState:UIControlStateNormal];
//    [self.navigationController dismissViewControllerAnimated:YES completion:NULL];

    [self uploadImage];
}

在这段代码中，我首先忽略了image pickerViewController，只是在我的按钮上设置了图像