上传图片

上传图片要求：选择图片后先显示出来，当点击提交按钮时才可以上传图片。
先上单张图片上传代码；
需要用到一个第三方 `#import “BoPhotoPickerViewController.h”

#import "BoPhotoPickerViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <MobileCoreServices/MobileCoreServices.h>

需要遵循代理

HJMHuiFangController ()<BoPhotoPickerProtocol, UIImagePickerControllerDelegate, UINavigationControllerDelegate>

但是运行会出现报错因为项目中还有两个类没有添加


添加完这两个类之后运行不会出现报错。就可以放心写代码了。
创建一个按钮，当点击按钮时会打开选择图片控制器，选择想要上传的图片，然后点击又上角确定，会返回到按钮页面，当点击上传按钮时，这个时候才会上传图片。具体代码如下。

self.selectPic = [[UIButton alloc]init];
        self.selectPic.frame = CGRectMake(5, 10, 100, 100);
        [self.selectPic setImage:[UIImage imageNamed:@"addphoto"] forState:UIControlStateNormal];
        [self.selectPic addTarget:self action:@selector(picClick:) forControlEvents:UIControlEventTouchUpInside];
        [cell addSubview:self.selectPic];

这个是创建选择图片按钮

#pragma mark 选择图片
- (void)picClick:(UIButton *)button {
    NSLog(@"2121221");
    BoPhotoPickerViewController *picker = [[BoPhotoPickerViewController alloc]init];
    picker.assetsFilter = [ALAssetsFilter allPhotos];
    picker.showEmptyGroups = YES;
    picker.delegate = self;
    picker.selectionFilter = [NSPredicate predicateWithBlock:^BOOL(id  _Nonnull evaluatedObject, NSDictionary<NSString *,id> * _Nullable bindings) {
        return YES;
    }];
    [self presentViewController:picker animated:YES completion:nil];
}

这是打开选择图片控制器方法

#pragma mark - BoPhotoPickerProtocol
- (void)photoPickerDidCancel:(BoPhotoPickerViewController *)picker {
    NSLog(@"选择取消按钮");
    [picker dismissViewControllerAnimated:YES completion:nil];
}

这是选择取消按钮方法

#pragma mark 上传图片代理方法
- (void)photoPicker:(BoPhotoPickerViewController *)picker didSelectAssets:(NSArray *)assets {
    if (assets.count == 1) {
        ALAsset *asset = assets[0];
        self.picArray = assets[0];
        [self.selectPic setImage:nil forState:UIControlStateNormal];
        UIImage *tempImg=[UIImage imageWithCGImage:asset.defaultRepresentation.fullScreenImage];
        [self.selectPic setImage:tempImg forState:UIControlStateNormal];
    }
    [picker dismissViewControllerAnimated:YES completion:nil];
}

这是选择确定按钮方法

- (void)photoPickerTapAction:(BoPhotoPickerViewController *)picker {
    if(![self checkCameraAvailability]){
        NSLog(@"没有访问相机权限");
        return;
    }
    [picker dismissViewControllerAnimated:NO completion:nil];
    UIImagePickerController *cameraUI = [UIImagePickerController new];
    cameraUI.allowsEditing = NO;
    cameraUI.delegate = self;
    cameraUI.sourceType = UIImagePickerControllerSourceTypeCamera;
    cameraUI.cameraFlashMode=UIImagePickerControllerCameraFlashModeAuto;

    [self presentViewController: cameraUI animated: YES completion:nil];
}
#pragma mark - UIImagePickerDelegate
- (void) imagePickerControllerDidCancel: (UIImagePickerController *) picker {

    [picker dismissViewControllerAnimated:YES completion:nil];
}

- (void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo {
    if (!error) {
        NSLog(@"保存到相册成功");
    }else{
        NSLog(@"保存到相册出错%@", error);
    }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
    NSString *mediaType = [info objectForKey: UIImagePickerControllerMediaType];
    UIImage *originalImage;
    if (CFStringCompare((CFStringRef) mediaType,kUTTypeImage, 0)== kCFCompareEqualTo) {
        originalImage = (UIImage *) [info objectForKey:UIImagePickerControllerOriginalImage];
    }
    [self.selectPic setImage:nil forState:UIControlStateNormal];
    [self.selectPic setImage:originalImage forState:UIControlStateNormal];
    [self dismissViewControllerAnimated:YES completion:nil];

}

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated {
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
}


- (BOOL)checkCameraAvailability {
    BOOL status = NO;
    AVAuthorizationStatus authStatus = [AVCaptureDevice authorizationStatusForMediaType:AVMediaTypeVideo];
    if(authStatus == AVAuthorizationStatusAuthorized) {
        status = YES;
    } else if (authStatus == AVAuthorizationStatusDenied) {
        status = NO;
    } else if (authStatus == AVAuthorizationStatusRestricted) {
        status = NO;
    } else if (authStatus == AVAuthorizationStatusNotDetermined) {
        status = NO;
    }
    return status;
}

必须实现的代理方法

ALAsset *asset = (ALAsset *)self.picArray;
    UIImage *tempImg=[UIImage imageWithCGImage:asset.defaultRepresentation.fullScreenImage];
    [manger POST:url parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {

        [formData appendPartWithFileData:UIImageJPEGRepresentation(tempImg, 0.3) name:@"imageFile" fileName:@"fileName.png" mimeType:@"text/plain"];
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
//       NSLog(@"宝宝头像上传== %@", responseObject[@"msg"]);
        NSLog(@"宝宝头像上传== %@", responseObject);
        if ([responseObject[@"success"] integerValue] == 1) {
                        // 返回到历史界面
                        [self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:2] animated:YES];
                        [SVProgressHUD dismiss];
                    }

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"错误信息=====%@", error);
    }];

    [self.dataArray removeAllObjects];

}

提交方法