Multi-image upload

From Post http://www.cocoachina.com/bbs/read.php?tid-285911-page-1.html

/**
* Upload content with pictures, allow multiple images to upload (URL) POST
*
* @param URL Network request address
* @param images An array of images to upload (note that the array contents need to be pictures)
* @param parameter The corresponding parameters of the image array
* @param Parameters Other parameters Dictionary
* @param compression ratio of ratio pictures (between 0.0~1.0)
* @param succeedblock a successful callback
* @param Failedblock failed callback
* @param callback for Uploadprogressblock upload progress
*/
+ (void) Startmultipartuploadtaskwithurl: (NSString *) URL
Imagesarray: (Nsarray *) images
Parameterofimages: (NSString *) parameter
Parametersdict: (nsdictionary *) parameters
Compressionratio: (float) ratio
Succeedblock: (void (^) (ID operation, id responseobject)) succeedblock
Failedblock: (void (^) (ID operation, Nserror *error)) Failedblock
Uploadprogressblock: (void (^) (float Uploadpercent,long long Totalbyteswritten,long long Totalbytesexpectedtowrite)) Uploadprogressblock;

Realize:
+ (void) Startmultipartuploadtaskwithurl: (NSString *) URL
Imagesarray: (Nsarray *) images
Parameterofimages: (NSString *) parameter
Parametersdict: (nsdictionary *) parameters
Compressionratio: (float) ratio
Succeedblock: (void (^) (ID, id)) Succeedblock
Failedblock: (void (^) (ID, Nserror *)) Failedblock
Uploadprogressblock: (void (^) (float, long long, long long)) uploadprogressblock{

if (Images.count = = 0) {
NSLog (@ "Upload content does not contain images");
Return
}
for (int i = 0; i < Images.count; i++) {
if (![ ImagesIskindofclass:[uiimage class]]) {
NSLog (@ "Images%d element is not a UIImage object", i+1);
Return
}
}

Afhttprequestoperation *operation = [[Self Sharedoperation].operationmanager post:url parameters:parameters constructingbodywithblock:^ (id<afmultipartformdata> formData) {

int i = 0;
Generate picture names based on current system time
NSDate *date = [NSDate Date];
NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
[Formatter setdateformat:@ "yyyy mm month DD Day"];
NSString *datestring = [Formatter stringfromdate:date];

For (UIImage *image in images) {
NSString *filename = [NSString stringwithformat:@ "%@%d.png", datestring,i];
NSData *imagedata;
if (ratio > 0.0f && ratio < 1.0f) {
ImageData = uiimagejpegrepresentation (image, ratio);
}else{
ImageData = uiimagejpegrepresentation (image, 1.0f);
}

[FormData appendpartwithfiledata:imagedata name:parameter filename:filename mimetype:@ "Image/jpg/png/jpeg"];
}


} success:^ (afhttprequestoperation *operation, id responseobject) {
Succeedblock (Operation,responseobject);

} failure:^ (Afhttprequestoperation *operation, Nserror *error) {
NSLog (@ "%@", error);
Failedblock (Operation,error);

}];

[Operation setuploadprogressblock:^ (Nsuinteger Byteswritten, Long long totalbyteswritten, long long Totalbytesexpectedtowrite) {
CGFloat percent = Totalbyteswritten * 1.0/totalbytesexpectedtowrite;
Uploadprogressblock (Percent,totalbyteswritten,totalbytesexpectedtowrite);
}];

}

Multi-image upload