利用AFNetworking上传用户头像

1.新建一个专门用来上传照片的类UploadIconService

.h文件

#import <Foundation/Foundation.h>

/// 请求成功的Block
typedef void(^RequestSuccess)(id responseObject);
/// 请求失败的Block
typedef void(^RequestFailed)(NSError *error);
/// 上传进度
typedef void (^Progress)(NSProgress *progress);

@interface UploadIconService : NSObject
+ (instancetype)shareUpload;

/**
 上传头像

 @param image 图像
 @param compressionQuality 质量
 */
- (void)upLoadImageWithImage:(UIImage * __nonnull)image
           AndRepresentation:(CGFloat)compressionQuality
                WithProgress:(Progress)progress
                SuccessBlock:(RequestSuccess)success
                FailureBlock:(RequestFailed)failure;
@end

.m文件

#import "UploadIconService.h"

@implementation UploadIconService
+ (instancetype)shareUpload{
    static UploadIconService *instance = nil;
    static dispatch_once_t once;
    dispatch_once(&once, ^{
        if(instance == nil)
        {
            instance = [[self alloc] init];
        }
    });
    
    return instance;
}

- (void)upLoadImageWithImage:(UIImage * __nonnull)image
           AndRepresentation:(CGFloat)compressionQuality
                WithProgress:(Progress)progress
                SuccessBlock:(RequestSuccess)success
                FailureBlock:(RequestFailed)failure{
    
    //[NSDate timeIntervalGetFromNow]
    AFSecurityPolicy *securityPolicy = [[AFSecurityPolicy alloc] init];
    [securityPolicy setAllowInvalidCertificates:YES];
    AFHTTPSessionManager *manger = [AFHTTPSessionManager manager];
//    [manger setSecurityPolicy:securityPolicy];
    manger.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html",@"image/jpg", nil];
    //    manger.responseSerializer = [AFHTTPResponseSerializer serializer];//返回的是二进制数据
    //    manger.requestSerializer = [AFHTTPRequestSerializer serializer];
    manger.requestSerializer = [AFJSONRequestSerializer serializer];//这个是默认的，可以不用写
    
    [manger POST:[NSString stringWithFormat:@"%@%@",BASEURL,JsaveLogo] parameters:@{@"token":[GVUserDefaults standardUserDefaults].token} constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
     //在这里处理image，压缩图片质量，裁剪图片大小   
//        UIImage *uploadimg = [image scaleToSize:CGSizeMake(100, 100)];
//        uploadimg = [UIImage compressImage:uploadimg compressRatio:0.9f];
        NSData *data = UIImageJPEGRepresentation(image,compressionQuality);
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        formatter.dateFormat = @"yyyyMMddHHmmss";
        NSString *str = [formatter stringFromDate:[NSDate date]];
        NSString *fileName = [NSString stringWithFormat:@"%@.jpg",str];
        
        [formData appendPartWithFileData:data name:@"topic" fileName:fileName mimeType:@"image/jpg"];
        
    } progress:^(NSProgress * _Nonnull uploadProgress) {
        progress(uploadProgress);
    } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        success(responseObject);
        
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        failure(error);
    }];

    
}
@end

1.1 name与fileName以及mimeType，fileName可以客户端处理命名，这里是获取当前的时间戳来拼接的。

1.2 manger.responseSerializer的acceptableContentTypes

manger.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html",@"image/jpg", nil];

2.在VC中直接调用

WEAKSELF;
    [[UploadIconService shareUpload] upLoadImageWithImage:img AndRepresentation:0.6 WithProgress:^(NSProgress *progress) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [progressView setAlpha:1 - 1.0 * progress.completedUnitCount / progress.totalUnitCount];
        });
    } SuccessBlock:^(id responseObject) {
        header.userInteractionEnabled = YES;
        header.image = img;
        progressView.hidden = YES;
        [weakSelf savePhoto:img andPresentation:0.6];
        [weakSelf sendRequest];
    } FailureBlock:^(NSError *error) {
        header.userInteractionEnabled = YES;
        progressView.hidden = YES;
    }];

2.1在回调进度，成功或者失败的时候处理一些UI，当上传成功的时候，保存图片到沙盒。

- (void)savePhoto:(UIImage *)photo andPresentation:(CGFloat)presentation{
    NSData *imageData = UIImageJPEGRepresentation(photo,presentation);
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString * documentsDirectory = [paths objectAtIndex:0];
    NSString * fullPathToFile = [documentsDirectory stringByAppendingString:JUserHeader];
    [imageData writeToFile:fullPathToFile atomically:YES];
}

2.2当使用SDWebImage加载图片时把沙盒的这张图片设置成placeHodelImg

[_headerIcon sd_setImageWithURL:[NSURL URLWithString:@""] placeholderImage:[self placeHodelImg]];

- (UIImage *)placeHodelImg{
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString * documentsDirectory = [paths objectAtIndex:0];
    NSString * fullPathToFile = [documentsDirectory stringByAppendingString:JUserHeader];
//    NSLog(@"%@",fullPathToFile);
    NSData * data = [NSData dataWithContentsOfFile:fullPathToFile];
    UIImage *image;
    if (data) {
        image = [UIImage imageWithData:data];
    }else{
        image = [UIImage imageNamed:@"user_header"];
    }
    return image;
}