How to converting NSString Data to Uiimage view in ios

Question

I have one Url :http://192.168.3.178:8090/SaveDollar/rest/deals/dealimages I am trying Get the Image from Url.

What I tried:

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    NSMutableArray *al=[NSJSONSerialization JSONObjectWithData:webData options:0 error:nil];
        NSLog(@"all NSMutable2");

   for (NSDictionary *diction in al)
    {
    Name.text=[diction valueForKey:@"dealImage"];
           NSString* str = Name.text;
           NSLog(@"%@dataImage is ",str);
           NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];
           NSUInteger len = data.length;
           uint8_t *bytes = (uint8_t *)[data bytes];
           NSMutableString *result = [NSMutableString stringWithCapacity:len * 3];
           [result appendString:@"["];
           for (NSUInteger i = 0; i < len; i++)
            {
                if (i)
                {   
                    [result appendString:@","];
                }
                [result appendFormat:@"%d", bytes[i]];
            }

            [result appendString:@"]"];
            NSLog(@"result%@",result);
            NSLog(@"uint8_t%s",bytes);
            NSMutableData *newData = [NSMutableData new];
            NSScanner *theScanner = [NSScanner scannerWithString: result];
             theScanner.charactersToBeSkipped = [NSCharacterSet characterSetWithCharactersInString:@"[],"];
            while ([theScanner isAtEnd] == NO) {
                int a;
                [theScanner scanInt:&a];
                uint8_t b = a;
                [newData appendBytes:(const void *)&b length:1];
            }
            UIImage *newImage = [UIImage imageWithData:newData];

            UIImageView *imageView=[[UIImageView alloc] initWithImage:newImage];
            imageView.frame = CGRectMake(0, 25 , 400,150);

            [self.view addSubview:imageView];
}
}

First I am converted String to NSdata and then NSData converted Byte data Second I am Converted Byte data to NSdata and then NSdata is pass to the UIImage

My Problem : Image not Displaying but Database have image so Please Give me any idea about my problem

JSON FormatViewer like this:

JSON
0
dealImageId : 1
dealImage : "WjQyNDAzMTM2Mzk2NTMxMzE="
dealId : 2
createdDate : 1393871400000
modifiedDate : 1399314600000
createdUserId : 2
modifiedUserId : 4
dealPosted
deleted : true
1
dealImageId : 3
dealImage : "5mQ4ZmZlMTdkY2E0NTc4Njk2NjAwMDA0OTQ5MmEwMDA4MDAwMDAwMGUwMDBlMDEwMjAwMWUwMDAwMDBiNjAwMDAwMDBmMDEwMjAwMTAwMDAwMDBkNDAwMDAwMDEwMDEwMjAwMGEwMDAwMDBlNDAwMDAwMDEyMDEwMzAwMDEwMDAwMDAwMTAwMDAwMDIwMjgyZTJlMmUyOQ=="
dealId : 1
createdDate : 1391365800000
modifiedDate : 1391365800000
createdUserId : 1
modifiedUserId : 2
dealPosted
deleted : false

Show example result from your web service. Log webData and al. — Wain
– Wain, Commented Apr 4, 2014 at 7:19
what do you get back from that URL? is it a jpeg? See the imageWithData: method of UIImage class, which may be relevant. — RobP
– RobP, Commented Apr 4, 2014 at 7:22
@Wain Thanks for Reply but i trying get image on Url when i am Hit url it's showing String Format so I am Trying NSString to NSdata Conversion and Then NSdata Converted Byte data and Then Byte Data conversion to NSData finally NSdata Pass to UIImageView — user3488098
– user3488098, Commented Apr 4, 2014 at 7:26
I understand what you're doing, it doesn't change the need to see what data is actually returned... — Wain
– Wain, Commented Apr 4, 2014 at 7:30

Pochi · Accepted Answer · 2014-04-04 07:44:31Z

2

The problem is that your URL is wrong. A copy and paste of the url into your browser should display the image. Once you have a valid Image URL you can display it easily with this method:

NSURL *url=[NSURL URLWithString:[NSString stringwithFormat:@"VALID IMAGE URL"]];
UIImage *img = [UIImage imageWithData:[NSData dataWithContentsOfURL:url]];

For instance, try your code with a different image url.

answered Apr 4, 2014 at 7:44

Pochi

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2 Comments

user3488098 Over a year ago

Thank for Reply my image Format like this : dealImage : "WjQyNDAzMTM2Mzk2NTMxMzE="

Pochi Over a year ago

there is no image format like that, what is the complete url you are trying to get an image from? Post an URL that, as explained on my answer, will display an image when copied directly into the web browser. Or are you trying to load a locally stored image? Like in the same network? Because the address you posted starts with 192.168.3.178 which means is stored on your network. If you are trying to get it from a database hosted by you, you would need the PUBLIC address to retrieve it. Also, the address you posted ends with a directory path, not a file.

Darshan Kunjadiya · Accepted Answer · 2014-04-04 09:17:28Z

2

Try this.

yourimg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"Your Image URL"]]];

edited Apr 4, 2014 at 9:17

Darshan Kunjadiya

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answered Apr 4, 2014 at 7:50

Rushi trivedi

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2 Comments

user3488098 Over a year ago

@indainarmy Thank for Reply my image Format like this : dealImage : "WjQyNDAzMTM2Mzk2NTMxMzE="

Rushi trivedi Over a year ago

@user3488098 whatever format is , you have to take particular url and put it in above code.

Community · Accepted Answer · 2017-05-23 12:33:32Z

2

To display an image from a base64 string you should try like this:

NSURL *URL = [NSURL URLWithString:
[NSString stringWithFormat:@"data:application/octet-stream;base64,%@", yourBase64String]];

dealImage.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:URL]];

EDIT:

If you need more on this have a look at the below links:

base64-decoding-in-ios-7

how-to-decode-base64-encoded-png-using-objective-c

edited May 23, 2017 at 12:33

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answered Apr 4, 2014 at 10:05

NeverHopeless

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Comments

Dileep · Accepted Answer · 2014-04-04 07:43:14Z

0

Try setImageWithURL: function in AFNetworking. Url specified should be a direct link to image.

[YourImageView setImageWithURL:@"Url"];

Url specified should be a direct link to image.

edited Apr 4, 2014 at 7:43

answered Apr 4, 2014 at 7:35

Dileep

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1 Comment

user3488098 Over a year ago

Thank for Reply my image Format like this : dealImage : "WjQyNDAzMTM2Mzk2NTMxMzE=" –

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