不需要考虑file转换问题，UIImageJPEGRepresentation(self.uploadImageView.allImages【i】,0.8)就是你想要的。
以下代码是我们用来传图的方式，其中name:@"images[]"换成你们后端程序对应的表单字段名
NSDictionary *param = @{@"type":self.typeId,
@"uid":self.userInfo[@"uid"],
@"project_id":self.projectId,
@"name":self.nameTextField.text,
@"info":self.infoTextView.text};
NSLog(@"param:%@",param);
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
[SVProgressHUD showWithStatus:@"正在上传图片" maskType:SVProgressHUDMaskTypeGradient];
[manager POST:[NSString stringWithFormat:@"%@/projectLog/create",HOST_URL] parameters:param constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
for (int i = 0; i < self.uploadImageView.allImages.count; i++) {
[formData appendPartWithFileData:UIImageJPEGRepresentation(self.uploadImageView.allImages（i）,0.8) name:@"images[]" fileName:@"something.jpg" mimeType:@"image/jpeg"];
}
} success:^(AFHTTPRequestOperation *operation, id responseObject) {
if ([[responseObject objectForKey:@"code"] isEqualToNumber:@1]) {
[SVProgressHUD showSuccessWithStatus:@"发布成功！"];
[self.navigationController popViewControllerAnimated:YES];
} else if ([[responseObject objectForKey:@"code"] isEqualToNumber:@400]) {
[SVProgressHUD dismiss];
} else {
[SVProgressHUD dismiss];
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:[responseObject objectForKey:@"message"] message:nil delegate:nil cancelButtonTitle:@"确定" otherButtonTitles: nil];
[alertView show];
}
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(@"%@",error);
[SVProgressHUD dismiss];
[[[UIAlertView alloc]initWithTitle:@"上传失败" message:@"网络故障，请稍后重试" delegate:nil cancelButtonTitle:@"确定" otherButtonTitles:nil] show];
}];
