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iOS Build a Blog Reader iPhone App Getting Data from the Web Downloading and Parsing JSON Data

Posted by Sayana Narayanan
Sayana Narayanan
1,221 Points

json data

hai, i couldnt run the json first programe under downloading and parsing json data....

no errors showing when i start compiling..but during compilation shows the below error... "terminating with uncaught exception of type NSException..."

can you help me.....

10 Answers

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

Your mistake is writing "@jsondata". looking back at the project it's supposed to be something like this:

NSURL *blogURL = [NSURL URLWithString:@"http://blog.teamtreehouse.com/api/get_recent_summary/"];

    NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];

    NSError *error = nil;

    NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

Try adding an exception breakpoint - and run the code again :) That should show you the line that's causing problems.

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

Thanks....

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

Yes, I did....but,It is showing the same error. ...

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

If it points to a line in your code, do you mind pasting it in here so we can have a look?

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

Actually I am running the whole code.... how can I add an " exception breakpoint "....sorry I dont know about it...

I added break points at the starting of json data link declaration ....while running its juz showing" breakpoint 1.1" on a green line

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

do it like this, and run the code again:

http://imgur.com/rPEqP3l

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

NSDictionary *blogspot = [NSJSONSerialization JSONObjectWithData:@"jsondata" options:0 error:&error];

pointing this line

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

couldnt see full code.... can you please paste it fully

Thomas Nilsen
Thomas Nilsen
14,957 Points
Thomas Nilsen
Thomas Nilsen
14,957 Points

like so:

NSURL *blogURL = [NSURL URLWithString:@"http://blog.teamtreehouse.com/api/get_recent_summary/"];

NSData *jsonData = [NSData dataWithContentsOfURL:blogURL];

NSError *error = nil;

NSDictionary *dataDictionary = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];

Sayana Narayanan
Sayana Narayanan
1,221 Points
Sayana Narayanan
Sayana Narayanan
1,221 Points

Finally it works :-)

thank you so much