Sort array using function

NSInteger sortByDistance(id obj1, id obj2, void *context) {

    NSDictionary *dict1 =(NSDictionary*)obj1;
    NSDictionary *dict2 =(NSDictionary*)obj2;

    NSInteger num1 = [[dict1 objectForKey:@"distance"] integerValue];
    NSInteger num2 = [[dict2 objectForKey:@"distance"] integerValue];

    if (num1 < num2)
        return NSOrderedAscending;
    else if (num1 > num2)
        return NSOrderedDescending;

    return NSOrderedSame;

}


sortedArray = [anArray sortedArrayUsingFunction:sortByDistance context:nil];

reverseSortArray = [[[anArray sortedArrayUsingFunction:sortByDistance context:nil] reverseObjectEnumerator] allObjects];

Sort Array

NSSortDescriptor *sort = [NSSortDescriptor sortDescriptorWithKey:@"name" ascending:YES];
sortedArray=[anArray sortedArrayUsingDescriptors:[NSArray arrayWithObject:sort]];

Random number Between limits

-(NSInteger)randNumberBetween:(NSInteger)min and:(NSInteger)max{

    return  (rand() % (max - min) + min);

}

Set Font For Bar Button item

UIBarButtonItem *facebook=[[UIBarButtonItem alloc] initWithTitle:@"FB" style:UIBarButtonItemStylePlain target:self action:@selector(postInFb:)];
[facebook setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                     [UIFont fontWithName:@"icomoon" size:30], NSFontAttributeName,
                                     [UIColor colorWithRed:68.0/255.0 green:85.0/255.0 blue:153.0/255.0 alpha:1], NSForegroundColorAttributeName,
                                     nil]
                           forState:UIControlStateNormal];

Playing embedded video in iOS

NSString* embeddtext =@"<iframe width=\"560\" height=\"315\" src=\"//www.youtube.com/embed/Neff9scaCCI\" frameborder=\"0\" allowfullscreen></iframe>";

NSLog(@"Full code = %@",embeddtext);

embeddtext = [embeddtext substringFromIndex:[embeddtext rangeOfString:@"src=\""].location+[embeddtext rangeOfString:@"src=\""].length];
embeddtext = [embeddtext substringToIndex:[embeddtext rangeOfString:@"\""].location ];

if([embeddtext rangeOfString:@"http"].location==NSNotFound)
    embeddtext=[NSString stringWithFormat:@"http:%@",embeddtext];

NSLog(@"video src = %@",embeddtext);

NSString *html = [NSString stringWithFormat:@"<iframe width=\"300\" height=\"250\" src=\"%@\" frameborder=\"0\" allowfullscreen></iframe>",embeddtext];

[webView loadHTMLString:html baseURL:[NSURL URLWithString:nil]];

Rendering Microsoft Files in Using Office Web App.

NSString *fileUrl;// .doc .docx, .ppt, .pptx, .xls, .xlsx files
fileUrl=[fileUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:[NSString stringWithFormat:@"http://view.officeapps.live.com/op/view.aspx?src=%@",fileUrl]]]];

Url Special Characters encoding

NSString *str=@"!*'();:@&=+$,/?%#[]";//put the url here...

NSString *encodedStr=(NSString *)CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(
                                                                          NULL,
                                                                          (CFStringRef)str,
                                                                          NULL,
                                                                          CFSTR("!*'();:@&=+$,/?%#[]"),
                                                                          kCFStringEncodingUTF8));
NSLog(@"after encoding = %@",encodedStr);