ios利用 AFN 上传相册或者拍照图片

由于项目中多处需要上传图片，我们可以自定义上传图片请求，自定义调取相册及拍照，方便多处使用时调用。

主要步骤：

1.第一步：请求上传你选取的相册图片或者拍照图片（经过压缩处理）

2.第二步：获取到第一步图片url上传给服务器

3.第三步：回显图片（当然进入该界面时先判断是否有图片，无图则展示占位图片，否则就回显图片）

废话不多说，直接上代码：

1）封装的上传图片的网络请求(图片压缩) QTXUploadImage 文件

// 利用 afn 上传一张图片
#import <Foundation/Foundation.h>

@interface QTXUploadImage : NSObject

// 上传图片的网络请求(图片压缩)
+ (void)post:(NSString *)url image:(UIImage *)image name:(NSString *)name success:(void (^)(id json))success failure:(void (^)(NSError *error))failure;

@end

#import "QTXUploadImage.h"
#import "AFNetworking.h"
#import "QTXAccount.h"
#import "QTXAccountTool.h"

@implementation QTXUploadImage

/**
 * 上传图片的网络请求(图片压缩)
 *
 * @param url       上传图片的网络请求地址
 * @param name       和后台包名一致
 *
 */
+ (void)post:(NSString *)url image:(UIImage *)image name:(NSString *)name success:(void (^)(id json))success failure:(void (^)(NSError *error))failure {

  // 1.创建网络管理者
  AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];

  // 2.拼接请求参数url 也可在具体控制器请求里传入
  NSDictionary *dict = @{@"userId" : [QTXAccountTool account].userId};

  // 3.发送请求
  [manager POST:url parameters:dict constructingBodyWithBlock:
   ^void(id<AFMultipartFormData> formData) {

     NSData *imageData = UIImageJPEGRepresentation(image, 0.5);//进行图片压缩

     // 使用日期生成图片名称
     NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
     formatter.dateFormat = @"yyyyMMddHHmmss";
     NSString *fileName = [NSString stringWithFormat:@"%@.png",[formatter stringFromDate:[NSDate date]]];
     // 任意的二进制数据MIMEType application/octet-stream
     [formData appendPartWithFileData:imageData name:name fileName:fileName mimeType:@"image/png"];

   } success:^void(NSURLSessionDataTask * task, id responseObject) {

     if (success) {
       success(responseObject);
     }

   } failure:^void(NSURLSessionDataTask * task, NSError * error) {

     if (failure) {
       failure(error);
     }
   }];
}
@end

2）封装的拍照/从相册选择 QTXImagePicker 文件

// 拍照/从相册选择
#import <Foundation/Foundation.h>

typedef void(^QTXImagePickerFinishAction)(UIImage *image);

@interface QTXImagePicker : NSObject

/**
 @param viewController 用于present UIImagePickerController对象
 @param allowsEditing  是否允许用户编辑图像
 */
+ (void)showImagePickerFromViewController:(UIViewController *)viewController
              allowsEditing:(BOOL)allowsEditing
               finishAction:(QTXImagePickerFinishAction)finishAction;

@end

#import "QTXImagePicker.h"

@interface QTXImagePicker()<UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>

@property (nonatomic, weak) UIViewController *viewController;
@property (nonatomic, copy) QTXImagePickerFinishAction finishAction;
@property (nonatomic, assign) BOOL allowsEditing;

@end

static QTXImagePicker *qtxImagePickerInstance = nil;

@implementation QTXImagePicker

+ (void)showImagePickerFromViewController:(UIViewController *)viewController allowsEditing:(BOOL)allowsEditing finishAction:(QTXImagePickerFinishAction)finishAction {
  if (qtxImagePickerInstance == nil) {
    qtxImagePickerInstance = [[QTXImagePicker alloc] init];
  }

  [qtxImagePickerInstance showImagePickerFromViewController:viewController
                        allowsEditing:allowsEditing
                        finishAction:finishAction];
}

- (void)showImagePickerFromViewController:(UIViewController *)viewController
              allowsEditing:(BOOL)allowsEditing
               finishAction:(QTXImagePickerFinishAction)finishAction {
  _viewController = viewController;
  _finishAction = finishAction;
  _allowsEditing = allowsEditing;

  UIActionSheet *sheet = nil;

  if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
    sheet = [[UIActionSheet alloc] initWithTitle:nil
                      delegate:self
                  cancelButtonTitle:@"取消"
               destructiveButtonTitle:nil
                  otherButtonTitles:@"拍照", @"从相册选择", nil];
  }else {
    sheet = [[UIActionSheet alloc] initWithTitle:nil
                      delegate:self
                  cancelButtonTitle:@"取消"
               destructiveButtonTitle:nil
                  otherButtonTitles:@"从相册选择", nil];
  }

  UIView *window = [UIApplication sharedApplication].keyWindow;
  [sheet showInView:window];
}

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  NSString *title = [actionSheet buttonTitleAtIndex:buttonIndex];
  if ([title isEqualToString:@"拍照"]) {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    picker.allowsEditing = _allowsEditing;
    [_viewController presentViewController:picker animated:YES completion:nil];

  }else if ([title isEqualToString:@"从相册选择"]) {
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//    [picker.navigationBar setBarTintColor:QTXNavColor]; // 修改相册的导航条的背景颜色
    picker.delegate = self;
    picker.allowsEditing = YES;
    picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    [_viewController presentViewController:picker animated:YES completion:nil];

  }else {
    qtxImagePickerInstance = nil;
  }
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
  UIImage *image = info[UIImagePickerControllerEditedImage];
  if (image == nil) {
    image = info[UIImagePickerControllerOriginalImage];
  }

  if (_finishAction) {
    _finishAction(image);
  }

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

  qtxImagePickerInstance = nil;
}

- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
  if (_finishAction) {
    _finishAction(nil);
  }

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

  qtxImagePickerInstance = nil;
}

@end

当使用时，在所需使用的控制器里调用：

[QTXImagePicker showImagePickerFromViewController:self allowsEditing:YES finishAction:^(UIImage *image) {
      if (image) {

        self.idSideImage = image;
        [QTXUploadImage post:QTX_xsz1Url image:image name:@"xsz1" success:^(id json) {
          // 第一步请求上传
          QTXLog(@"图像上传请求成功 %@", json);

          self.idSide = json[@"data"];

        } failure:^(NSError *error) {
          QTXLog(@"学生证图像上传请求失败 %@", error);
        }];
      }
    }];

第二步和第三步 需要和各位自己后台server联调，就属于普通的get/post请求了，这边就不放代码了哟

插一下，我们产品没让拍照的照片存储到相册

// 存储图片名称：001.png ~ 009.png

for (int i = 1; i<=9; i++) {
   UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"00%d.png", i]];

   UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

   [NSThread sleepForTimeInterval:1];
  }

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