我想将一个图像发送到正文中的服务器。图像没有任何参数。带图像我还有一些其他参数要发送。
我使用下面的代码进行上传。此代码的问题我既没有得到错误也没有结果。
请找到代码;
-(void)uploadimage1
{
NSData *imageData = UIImageJPEGRepresentation(_imgOutlet.image, 1.0);
NSString *base64Img = [imageData base64EncodedStringWithOptions:NSDataBase64EncodingEndLineWithLineFeed];
// NSDictionary *parameters = @{@"data":base64Img};
NSError *error;
// NSData *jsonData = [NSJSONSerialization dataWithJSONObject:base64Img
// options:nil
// error:&error];
//
// //do some error checking
// http://imhsservices.org/IMHS_NEW/api/Image_Base64?AadharCardNo=369369369369.00&UploadDate=2017-05-25&OriginalName=2.jpg&ReportType=Medical
NSString *urlstr = [NSString stringWithFormat:@"http://imhsservices.org/IMHS_NEW/api/Image_Base64?AadharCardNo=%@&UploadDate=%@&ReportType=%@&OriginalName=%@",@"369369369369.00",@"2017-08-11",@"Medical",@"2.jpg"];
NSLog(@"%@",urlstr);
NSURL *url = [NSURL URLWithString:urlstr];
NSURLSession *session = [NSURLSession sharedSession];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setHTTPBody:base64Img];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSLog(@"%@",error);
if (!error) {
if ([data length]) {
NSString *jsonResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"%@",jsonResponse);
//GET RESULT;
// NSLog(@"A %@", parameters[@"results"]);
}
} else {
NSLog(@"%@", error);
}
}];
[task resume];
}
你能帮我解决这个问题吗,谢谢快速回复。谢谢你...
答案 0 :(得分:1)
<强>更新强>:
在你的情况下试试:
NSString *strImage = [base64Img stringByReplacingOccurrencesOfString:@"+" withString:@"%2B"];
然后转换为NSData
:
NSData *data = [strImage dataUsingEncoding:NSUTF8StringEncoding];
然后将data
发送到您的httpBody
。
从服务器使用时检索
NSString *strImageData = [finalImagePath stringByReplacingOccurrencesOfString:@"%2B" withString:@"+"];
OR :(使用分段上传)
您需要为参数和要上传的图像创建边界。
使用此代码段:
#pragma mark - Upload image with params
+ (void)postRestApiWithImage:(NSDictionary *)params withMethod:(NSString *)methodName withImage:(UIImage *)image completion: (void(^)(id result, NSError* error))completionHandler {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSLog(@"%@", params);
NSString *boundary = [self generateBoundaryString];
// configure the request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: [NSString stringWithFormat:@"%s%@", kbaseUrl, methodName]]];
[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:@[image] fieldName:@"profile_image"];
request.HTTPBody = httpBody;
NSURLSession *session = [NSURLSession sharedSession]; // use sharedSession or create your own
NSURLSessionTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
dispatch_async(dispatch_get_main_queue(),^ {
if (completionHandler) {
completionHandler(nil, error);
}
});
NSLog(@"error = %@", error);
return;
}
dispatch_async(dispatch_get_main_queue(),^ {
if (completionHandler) {
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil]; //Make one NSError here
// NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(@"result = %@", result);
completionHandler(result, nil);
}
});
}];
[task resume];
});
}
+ (NSData *)createBodyWithBoundary:(NSString *)boundary
parameters:(NSDictionary *)parameters
paths:(NSArray *)images
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 (UIImage *image in images) {
NSString *filename = @"Profile_img";
NSData *data = UIImageJPEGRepresentation(image, 0.5);
NSString *mimetype = @"image/jpeg";
NSLog(@"->%@->%@", filename, mimetype);
[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;
}
+ (NSString *)generateBoundaryString {
return [NSString stringWithFormat:@"Boundary-%@", [[NSUUID UUID] UUIDString]];
}
希望它有所帮助!
您可以有更多想法here
答案 1 :(得分:0)
UIImage *imageobj=[UIImage imageNamed:@"a.jpg"];
NSData *data1=UIImagePNGRepresentation(imageobj);
NSString *encodedString = [data1 base64Encoding];
NSString * strEncondingdata=[NSString stringWithFormat:@"%@%@",@"data:image/png;base64,",encodedString];
NSLog(@"%@",strEncondingdata);
您需要将图像转换为此格式,然后才能发送到服务器。还有一个是检查图像分辨率,如果图像是更高分辨率的服务器端没有上传那么,前端你需要压缩图像。 使用下面的代码压缩图像。
NSData *unscaledData = UIImagePNGRepresentation(imageobj);
if (unscaledData.length > 5000.0f ) {
UIImage *image2 = [self imageWithImage:image scaledToSize:CGSizeMake(image.size.width/2, image.size.height/2)];
NSData *finalData = UIImagePNGRepresentation(image2);
if (finalData.length > 5000.0f ) {
image3 = [self imageWithImage:image2 scaledToSize:CGSizeMake(image2.size.width/2, image2.size.height/2)];
}
}
-(UIImage *)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
// Create a bitmap context.
UIGraphicsBeginImageContextWithOptions(newSize, YES, [UIScreen mainScreen].scale);
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}