How to Arrange JSON Parsed Array Based On Page Number? - ios

Question

i am newbie in iOS Development i parsed my JSON Data my Data like as
{
mid: "1",
name: "august 2014",
front_image:"http://www.truemanindiamagazine.com/webservice/magazineimage/frontimage/1.jpg",
title: "August fist edition",
release_date: "2014-08-01",
short_description: "Here we present to you for the first time our Magazine Trueman India. “Trueman India” covers Bollywood Gossips, film reviews, upcoming movies, F",
current_issue: 0,
-demopage: [
{
link:my image URL
page_no: "1"
},
{
link: my image URL,
page_no: "16"
},
{
link: my image URL,
page_no: "2"
},
{
link: my image URL,
page_no: "22"
},
{
link: my image URL,
page_no: "25"
},
{
link: my image URL,
page_no: "26"
},
And i parsed this Data into two array like as
NSError* error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responsedata options:kNilOptions error:&error];
self.imagesa= nil;
if([jsonDict count]>0)
{
NSArray *arrData = [jsonDict objectForKey:#"data"];
if([arrData count]>0)
{
NSDictionary *imgDict = [arrData objectAtIndex:1];
if([imgDict count]>0)
{
NSMutableArray *imgsLinkArray = [imgDict objectForKey:#"demopage"];
self.imagesa = imgsLinkArray;
}
}
}
then it is Parsed and i got aresult what i want but here one problem is taht when i Show this image with Page number in Scrollview then i Show my image in to as per i got JSON data but i want my Imageview are Based on PageNumber like as From 1 to upto the data array Size.please Give me Solution for that i arrange my Image Based on my page number Wise here my Code for image and Page Number Parsing is
for(int index=0; index < [self.imagesa count]; index++)
{
NSDictionary *dict=[self.imagesa objectAtIndex:index];
NSString *image=[dict valueForKey:#"link"];
NSString *pageNumber=[dict valueForKey:#"page_no"];
smallImage = [[UIImageView alloc] init];
pageLabel=[[UILabel alloc]init];
[pageLabel setBackgroundColor:[UIColor clearColor]];
[smallImage sd_setImageWithURL:[NSURL URLWithString:image] placeholderImage:[UIImage imageNamed:#"1.png"]];
[pageLabel setText:[NSString stringWithFormat:#"Page%#",pageNumber]];
and i added my label and imageview into my Scrollview then it is Working as i want but it is not Show image Based on Page nuber like as From ! to upto array size please Give me Solution for that.

Answer 1

Sort your imagesLinkArray this way:
self.imagesa = [[imgsLinkArray sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {
if ([obj1[#"page_no"] intValue] > [obj2[#"page_no"] intValue]) {
return NSOrderedDescending;
} else if ([obj1[#"page_no"] intValue] < [obj2[#"page_no"] intValue]) {
return NSOrderedAscending;
}
return NSOrderedSame;
}] mutableCopy];

Answer 2

You should set the pageLabel test based on your index variable (+1), not the pageNumber. As follows:
[pageLabel setText:[NSString stringWithFormat:#"Page %lu",(long unsigned)(index+1)]];

Answer 3

Bro you drop value in An array Like this
if([imgDict count]>0)
{
NSMutableArray *imgsLinkArray = [imgDict objectForKey:#"demopage"];
self.imagesa = imgsLinkArray;
}
Then you have all the value in self.imagesa array....
So just wright only this....
[pageLabel setText:[NSString stringWithFormat:#"Page %lu",(long unsigned)[[self.imagesa objectAtIndex:index] valueForKey:#"page_no"]]];
For your short array OrderBy ............
NSMutableArray *recent=[[NSMutableArray alloc]init];
NSSortDescriptor *descriptor = [[NSSortDescriptor alloc] initWithKey:#"page_no" ascending:YES selector:#selector(localizedStandardCompare:)] ;
[self.imagesa sortedArrayUsingDescriptors:[NSArray arrayWithObjects:descriptor,nil]];
recent = [[self.imagesa sortedArrayUsingDescriptors:[NSArray arrayWithObjects:descriptor,nil]] copy];
self.imagesa = (NSMutableArray *) [[NSMutableArray alloc]initWithArray:recent];