AFNetworking上传一张或多张图片,并压缩图片节约占用内存

最近在做APP的时候，遇到了难题：根据公司需求，在用户评论并上传图片的时候，有的手机像素比较高拍的照片高清的，但是每张图片占用的内存太大，或者上传照片的时候，相册的部分照片本身就占很大内存空间，后台数据库内存量有限，如果后期用户达到了几百万，每个用户都评论并上传这么高像素大内存的图片上去，后台数据库怕承受不了，继续拓展后台存储量的话，需要很大成本，那么怎么在前台来处理这些上传的图片而又不失大体呢？

这次总结得是用AFNetworking 向后台传输一张或多张图片，并且将照片压缩，感觉还是AFNetworking好使，相比原生的NSSURLsession的传输方法，话不多说，开始分享，用的话，代码基本不用改，直接用~（上传头像的时候，点击保存~触发这个）

上传一张图片：

UIImage *image = [UIImage  imageNamed:@"3"];
NSMutableDictionary *photo = [NSMutableDictionary dictionary];
[photo setObject:@"123" forKey:@"phoneNumber"];

[photo setObject:@"123" forKey:@"psw"];

NSLog(@"1111%@",photo);

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.requestSerializer.timeoutInterval = 20;
manager.responseSerializer.acceptableContentTypes = [NSSet setWithArray:@[@"text/plain",@"multipart/form-data"]];
[manager POST:@"http://192.168.0.105:8080/miracle/Upload.action" parameters:photo constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

NSDate *date = [NSDate date];
NSDateFormatter *formormat = [[NSDateFormatter alloc]init];
[formormat setDateFormat:@"HHmmss"];
NSString *dateString = [formormat stringFromDate:date];

NSString *fileName = [NSString  stringWithFormat:@"%@.png",dateString];
NSData *imageData = UIImageJPEGRepresentation(image, 1);
double scaleNum = (double)300*1024/imageData.length;
NSLog(@"图片压缩率：%f",scaleNum);

if(scaleNum <1){

imageData = UIImageJPEGRepresentation(image, scaleNum);
}else{

imageData = UIImageJPEGRepresentation(image, 0.1);

}

[formData  appendPartWithFileData:imageData name:@"files" fileName:fileName mimeType:@"image/jpg/png/jpeg"];

} progress:^(NSProgress * _Nonnull uploadProgress) {

NSLog(@"---%@",uploadProgress);

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

NSLog(@"`````````%@",responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

}];

View Code

上传多张图片：

 NSArray * _imageArr = @[@"1",@"2",@"3"];

AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.requestSerializer.timeoutInterval = 20;
manager.responseSerializer.acceptableContentTypes = [NSSet setWithArray:@[@"text/plain",@"multipart/form-data"]];
[manager POST:@"http://192.168.0.105:8080/miracle/Upload.action" parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {

for (int i=0; i<_imageArr.count; i++) {

UIImage * image =[UIImage  imageNamed:_imageArr[i]];
NSDate *date = [NSDate date];
NSDateFormatter *formormat = [[NSDateFormatter alloc]init];
[formormat setDateFormat:@"HHmmss"];
NSString *dateString = [formormat stringFromDate:date];

 NSString *fileName = [NSString  stringWithFormat:@"%@.png",dateString];
NSData *imageData = UIImageJPEGRepresentation(image, 1);
double scaleNum = (double)300*1024/imageData.length;
NSLog(@"图片压缩率：%f",scaleNum);

23

if(scaleNum <1){

imageData = UIImageJPEGRepresentation(image, scaleNum);
}else{

imageData = UIImageJPEGRepresentation(image, 0.1);

}

[formData  appendPartWithFileData:imageData name:@"files" fileName:fileName mimeType:@"image/jpg/png/jpeg"];
}
} progress:^(NSProgress * _Nonnull uploadProgress) {

38         NSLog(@"---%@",uploadProgress);

} success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {

NSLog(@"`````````%@",responseObject);

} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {

}];