上傳頭像在APP開(kāi)發(fā)中是個(gè)很常見(jiàn)的功能，也不難，但是對(duì)于沒(méi)有接觸過(guò)的小伙伴還是有點(diǎn)坑的，不過(guò)只要稍微弄明白了 各個(gè)參數(shù)的意思就很簡(jiǎn)單了。直接貼出來(lái)代碼，簡(jiǎn)單粗暴。

1 首先因?yàn)橐玫絠magePicker，所以需要先遵守協(xié)議

<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

2 給頭像的ImageView添加個(gè)tap手勢(shì)

這個(gè)要記得開(kāi)userInteractionEnabled，要不點(diǎn)了也沒(méi)反應(yīng)

    //頭像
    UITapGestureRecognizer *changeUserIconTap =[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(changeUserIconAction:)];
    [_user_iconImageView addGestureRecognizer:changeUserIconTap];

2 tap事件里面

//更換頭像
- (void)changeUserIconAction:(UITapGestureRecognizer *)tap{
    //底部彈出來(lái)個(gè)actionSheet來(lái)選擇拍照或者相冊(cè)選擇
    UIAlertController *userIconActionSheet = [UIAlertController alertControllerWithTitle:@"請(qǐng)選擇上傳類型" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    //相冊(cè)選擇
    UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@"手機(jī)相冊(cè)選擇" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        WKLog(@"相冊(cè)選擇");
        //這里加一個(gè)判斷，是否是來(lái)自圖片庫(kù)
        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){
            UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
            imagePicker.delegate = self;            //協(xié)議
            imagePicker.allowsEditing = YES;
            imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
            [self presentViewController:imagePicker animated:YES completion:nil];
        }
    }];
    //系統(tǒng)相機(jī)拍照
    UIAlertAction *photoAction = [UIAlertAction actionWithTitle:@"相機(jī)" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        WKLog(@"相機(jī)選擇");
        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
               UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
            imagePicker.delegate = self;
            imagePicker.allowsEditing = YES;
            imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
            [self presentViewController:imagePicker animated:YES completion:nil];
        }
    }];
    UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
        //取消
        WKLog(@"取消");
    }];
    [userIconActionSheet addAction:albumAction];
    [userIconActionSheet addAction:photoAction];
    [userIconActionSheet addAction:cancelAction];
    [self presentViewController:userIconActionSheet animated:YES completion:nil];
}

代理方法

#pragma mark 調(diào)用系統(tǒng)相冊(cè)及拍照功能實(shí)現(xiàn)方法
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
    UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];//獲取到所選擇的照片
    _user_iconImageView.image = img;
    UIImage *compressImg = [self imageWithImageSimple:img scaledToSize:CGSizeMake(60, 60)];//對(duì)選取的圖片進(jìn)行大小上的壓縮
    [self transportImgToServerWithImg:compressImg]; //將裁剪后的圖片上傳至服務(wù)器
    [self dismissViewControllerAnimated:YES completion:nil];

}

//用戶取消選取時(shí)調(diào)用,可以用來(lái)做一些事情
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
    [picker dismissViewControllerAnimated:YES completion:nil];
}

圖片裁剪壓縮方法

//壓縮圖片方法
- (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize{
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

上傳到服務(wù)器

//上傳圖片至服務(wù)器后臺(tái)
- (void)transportImgToServerWithImg:(UIImage *)img{
    NSData *imageData;
    NSString *mimetype;
  //判斷下圖片是什么格式
    if (UIImagePNGRepresentation(img) != nil) {
        mimetype = @"image/png";
        imageData = UIImagePNGRepresentation(img);
    }else{
        mimetype = @"image/jpeg";
        imageData = UIImageJPEGRepresentation(img, 1.0);
    }
    NSString *urlString = @"http:///XXXXXX";
    NSDictionary *params = @{@"login_token":@"220"};
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    [manager POST:urlString parameters:paramsconstructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
        NSString *str = @"avatar";
        NSString *fileName = [[NSString alloc] init];
        if (UIImagePNGRepresentation(img) != nil) {
            fileName = [NSString stringWithFormat:@"%@.png", str];
        }else{
            fileName = [NSString stringWithFormat:@"%@.jpg", str];
        }
        // 上傳圖片，以文件流的格式
        /**
         *filedata : 圖片的data
         *name     : 后臺(tái)的提供的字段
         *mimeType : 類型
         */
        [formData appendPartWithFileData:imageData name:str fileName:fileName mimeType:mimetype];
    } progress:NULL success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
        //打印看下返回的是什么東西
        WKLog(@"上傳憑證成功:%@",responseObject);
    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
        WKLog(@"上傳圖片失敗，失敗原因是:%@", error);
    }];
}

需要注意的一些東西:

1.一定記得在info.plist里面 寫獲取 相冊(cè)，相機(jī)權(quán)限的字段，要不會(huì)崩的。
2.拍照只能在真機(jī)上試。
3.上傳的時(shí)候，參數(shù)可以加密，但是加密后data可能有變化，這個(gè)就需要自己看著辦了。。。