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：
- 自定义ZLImagePicker, 从相册选择图片或者拍照上传图片页面
- 请求上传你选取的相册图片或者拍照图片（经过压缩处理）
- 获取到第一步图片url上传给服务器
- 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）
###Step1. 自定义ZLImagePicker, 从相册选择图片或者拍照上传图片页面
用于present UIImagePickerController对 且allowsEditing 是否允许用户编辑图像:
+ (void)showImagePickerFromViewController:(UIViewController *)viewController allowsEditing:(BOOL)allowsEditing finishAction:(ZLImagePickerFinishAction)finishAction { if (ZLImagePickerInstance == nil) { ZLImagePickerInstance = [[ZLImagePicker alloc] init]; } [ZLImagePickerInstance showImagePickerFromViewController:viewController allowsEditing:allowsEditing finishAction:finishAction];}复制代码 - (void)showImagePickerFromViewController:(UIViewController *)viewController allowsEditing:(BOOL)allowsEditing finishAction:(ZLImagePickerFinishAction)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];}复制代码 ###Step2. 封装的上传图片的网络请求(图片压缩) ZLUploadImage 文件 利用 afn 上传一张图片:
#import "AFNetworking.h"复制代码
/** * 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" : [YYPAccountTool getUserId]}; NSDictionary *dict; // 这里按实际情况的用户id上传 // 3.发送请求 [manager POST:url parameters:dict constructingBodyWithBlock: ^void(id 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); } }];}复制代码 ###Step3. 获取到第一步图片url上传给服务器
需要和各位自己后台server联调，就属于普通的get/post请求了哟 调用拍照或打开相册上传icon图像:
[ZLImagePicker showImagePickerFromViewController:self allowsEditing:YES finishAction:^(UIImage *image) { if (image) { [btn setBackgroundImage:image forState:UIControlStateNormal]; self.icon = image;}];复制代码 ###Step4: 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
[iconBtn setBackgroundImage:(self.icon == nil ? [UIImage imageNamed:@"icon"]: self.icon) forState:UIControlStateNormal];复制代码
PS: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.pngfor (int i = 1; i<=9; i++) { UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"00%d.png", i]]; UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil); [NSThread sleepForTimeInterval:1]; }复制代码