所以这个HTML代码以正确的格式为我提交数据.
<form action="https://www.example.com/register.php" method="post" enctype="multipart/form-data">
Name: <input type="text" name="userName"><BR />
Email: <input type="text" name="userEmail"><BR />
Password: <input type="text" name="userPassword"><BR />
Avatar: <input type="file" name="avatar"><BR />
<input type="submit">
</form>
我看过很多关于如何在iOS上发布多部分/表单数据的文章，但没有一篇真正解释如果有正常参数以及文件上传，该怎么做.
你能帮我把代码发到Obj-C上吗？
谢谢
过程如下:
使用userName、userEmail和userPassword参数创建字典.
NSDictionary *params = @{@"userName" : @"rob",
@"userEmail" : @"rob@email.com",
@"userPassword" : @"password"};
确定图像的路径:
NSString *path = [[NSBundle mainBundle] pathForResource:@"avatar" ofType:@"png"];
创建请求:
NSString *boundary = [self generateBoundaryString];
// configure the request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"POST"];
// set content type
NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary];
[request setValue:contentType forHTTPHeaderField: @"Content-Type"];
// create body
NSData *httpBody = [self createBodyWithBoundary:boundary parameters:params paths:@[path] fieldName:fieldName];
这是上面用于构建请求主体的方法:
- (NSData *)createBodyWithBoundary:(NSString *)boundary
parameters:(NSDictionary *)parameters
paths:(NSArray *)paths
fieldName:(NSString *)fieldName {
NSMutableData *httpBody = [NSMutableData data];
// add params (all params are strings)
[parameters enumerateKeysAndObjectsUsingBlock:^(NSString *parameterKey, NSString *parameterValue, BOOL *stop) {
[httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", parameterKey] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"%@\r\n", parameterValue] dataUsingEncoding:NSUTF8StringEncoding]];
}];
// add image data
for (NSString *path in paths) {
NSString *filename = [path lastPathComponent];
NSData *data = [NSData dataWithContentsOfFile:path];
NSString *mimetype = [self mimeTypeForPath:path];
[httpBody appendData:[[NSString stringWithFormat:@"--%@\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", fieldName, filename] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:[[NSString stringWithFormat:@"Content-Type: %@\r\n\r\n", mimetype] dataUsingEncoding:NSUTF8StringEncoding]];
[httpBody appendData:data];
[httpBody appendData:[@"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
}
[httpBody appendData:[[NSString stringWithFormat:@"--%@--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
return httpBody;
}
以上使用以下实用方法:
@import MobileCoreServices; // only needed in iOS
- (NSString *)mimeTypeForPath:(NSString *)path {
// get a mime type for an extension using MobileCoreServices.framework
CFStringRef extension = (__bridge CFStringRef)[path pathExtension];
CFStringRef UTI = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension, extension, NULL);
assert(UTI != NULL);
NSString *mimetype = CFBridgingRelease(UTTypeCopyPreferredTagWithClass(UTI, kUTTagClassMIMEType));
assert(mimetype != NULL);
CFRelease(UTI);
return mimetype;
}
- (NSString *)generateBoundaryString {
return [NSString stringWithFormat:@"Boundary-%@", [[NSUUID UUID] UUIDString]];
}
然后提交请求.这里有很多很多 Select .
例如，如果使用NSURLSession，可以创建NSURLSessionUploadTask:
NSURLSession *session = [NSURLSession sharedSession]; // use sharedSession or create your own
NSURLSessionTask *task = [session uploadTaskWithRequest:request fromData:httpBody completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"error = %@", error);
return;
}
NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"result = %@", result);
}];
[task resume];
或者你可以创建一个NSURLSessionDataTask:
request.HTTPBody = httpBody;
NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(@"error = %@", error);
return;
}
NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"result = %@", result);
}];
[task resume];
以上假设服务器只是返回文本响应.最好是服务器返回JSON，在这种情况下，使用NSJSONSerialization而不是NSString方法initWithData.
同样，我使用的是NSURLSession以上的完整块格式副本，但也可以使用更丰富的基于代理的格式副本.但这似乎超出了这个问题的范围，所以我将把这个问题留给你们.
但希望这能说明这个 idea .
如果我没有指出，你可以使用AFNetworking，重复上面的第一步和第二步，但只需调用:
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.responseSerializer = [AFHTTPResponseSerializer serializer]; // only needed if the server is not returning JSON; if web service returns JSON, remove this line
NSURLSessionTask *task = [manager POST:urlString parameters:params constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
NSError *error;
if (![formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"avatar" fileName:[path lastPathComponent] mimeType:@"image/png" error:&error]) {
NSLog(@"error appending part: %@", error);
}
} progress:nil success:^(NSURLSessionTask *task, id responseObject) {
NSLog(@"responseObject = %@", responseObject);
} failure:^(NSURLSessionTask *task, NSError *error) {
NSLog(@"error = %@", error);
}];
if (!task) {
NSLog(@"Creation of task failed.");
}