我使用 AFMultipartFormData 将多张图片发送到服务器，使用 for 循环一次获取一张图片:
NSString *string = [NSString stringWithFormat:@"%@/API/Upload",BaseURLString];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager setRequestSerializer:[AFHTTPRequestSerializer serializer]];
[manager setResponseSerializer:[AFHTTPResponseSerializer serializer]];
NSError *error;
NSString *mystring = @"noName";
//FOR Loop Start
for(NSData *eachImage in dataStringArray) {
NSURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:string parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFormData:eachImage name:@"myImage"];
[formData appendPartWithFormData:[mystring dataUsingEncoding:NSUTF8StringEncoding]
name:@"FileName"];
} error:&error];
NSURLSessionDataTask *task = [manager dataTaskWithRequest:request uploadProgress:nil downloadProgress:nil completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
if (error) {
NSLog(@"%@", error.localizedDescription);
return;
}
[uploadedImageIDs addObject:[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]];
}];
[task resume];
}//for end
[self makeJSON:uploadedImageIDs];
但不知何故，它之前调用了 makeJSON 方法。由于有多张图片，所以我需要在所有图片上传完成后调用它。
最佳答案
网络处理将以异步方式运行，因此您需要在网络 completionHandler 中计数以了解所有任务何时完成。像这样
NSString *string = [NSString stringWithFormat:@"%@/API/Upload",BaseURLString];
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
[manager setRequestSerializer:[AFHTTPRequestSerializer serializer]];
[manager setResponseSerializer:[AFHTTPResponseSerializer serializer]];
NSError *error;
NSString *mystring = @"noName";
NSInteger count = 0;
//FOR Loop Start
for(NSData *eachImage in dataStringArray) {
NSURLRequest *request = [manager.requestSerializer multipartFormRequestWithMethod:@"POST" URLString:string parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
[formData appendPartWithFormData:eachImage name:@"myImage"];
[formData appendPartWithFormData:[mystring dataUsingEncoding:NSUTF8StringEncoding]
name:@"FileName"];
} error:&error];
NSURLSessionDataTask *task = [manager dataTaskWithRequest:request uploadProgress:nil downloadProgress:nil completionHandler:^(NSURLResponse * _Nonnull response, id _Nullable responseObject, NSError * _Nullable error) {
count++;
if (error) {
NSLog(@"%@", error.localizedDescription);
} else {
[uploadedImageIDs addObject:[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding]];
}
if (count == dataStringArray.count) {
[self makeJSON:uploadedImageIDs];
}
}];
[task resume];
}//for end
关于ios - AFMultipartFormData 上传完成后运行方法，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40507074/