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

? 1 2 3 4 5 6 7 8 9 // 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 ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 #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

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 // 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 ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 #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：

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 [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

? 1 2 3 4 5 6 7 8 9 // 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]; }

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。

原文链接：http://www.jianshu.com/p/990d3e60c1e9?utm_source=tuicool&utm_medium=referral