UITextView with HTML text

UITextView *textView = [[UITextView alloc] init];
    textView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:textView];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];
    [self.view addConstraints:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-[textView]-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(textView)]];

    NSString *htmlString = @"<h1>Header</h1><h2>Subheader</h2><p>Some <em>text</em></p><img src='http://blogs.babble.com/famecrawler/files/2010/11/mickey_mouse-1097.jpg' width=70 height=100 />";
    NSAttributedString *attributedString = [[NSAttributedString alloc] initWithData:[htmlString dataUsingEncoding:NSUnicodeStringEncoding] options:@{ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType } documentAttributes:nil error:nil];
    textView.attributedText = attributedString;

Fix blank space at top of UITextView in iOS 7

-(BOOL)automaticallyAdjustsScrollViewInsets{

    return NO;
}

Loading Table view Cell image form URL

 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_BACKGROUND, 0) , ^{
                    NSData *imgData = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"Image url here"]];
                    if (imgData) {
                        UIImage *image = [UIImage imageWithData:imgData];
                        if (image) {
                            dispatch_async(dispatch_get_main_queue(), ^{
                                MyCustomCell  *cell = (id)[tableView cellForRowAtIndexPath:indexPath];
                                if (cell)
                                    cell.myCellImgView.image=image;
                            });
                        }
                    }
                });

@Property Attributes

Attribute	Description
getter=	Use a custom name for the getter method.
setter=	Use a custom name for the setter method.
readonly	Don’t synthesize a setter method.
nonatomic	Don’t guarantee the integrity of accessors in a multi-threaded environment. This is more efficient than the default atomic behavior.
strong	Create an owning relationship between the property and the assigned value. This is the default for object properties.
weak	Create a non-owning relationship between the property and the assigned value. Use this to prevent retain cycles.
copy	Create a copy of the assigned value instead of referencing the existing instance. Reference

NULL and nil

• The null pointer is a special kind of pointer that doesn’t point to anything.
• Pointer can be “emptied” using the null pointer.
• A good rule of thumb is to use nil for variables that hold Objective-C objects and NULL when working with C pointers.

NSString *anObject;    // An Objective-C object
anObject = NULL;       // This will work
anObject = nil;        // But this is preferred
int *aPointer;         // A plain old C pointer
aPointer = nil;        // Don't do this
aPointer = NULL;       // Do this instead

Find Longitude and Latitude From Address String

 CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    NSString *addressString =@"Apple Inc";
    [geocoder
     geocodeAddressString:addressString
     completionHandler:^(NSArray *placemarks,
                         NSError *error) {
         if (error) {
             NSLog(@"Geocode failed with error: %@", error);
             return;
         }
         if (placemarks && placemarks.count > 0)
         {
             CLPlacemark *placemark = placemarks[0];

             CLLocation *location = placemark.location;
             NSLog(@"latitude = %f longitude = %f",location.coordinate.latitude , location.coordinate.longitude);
         }
     }];

Location Details From latitude and longitude

CLLocation *location=[[CLLocation alloc] initWithLatitude:48.8582 longitude:2.2945];
    CLGeocoder *geocoder = [[CLGeocoder alloc] init];
    [geocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        if(placemarks.count){
            NSDictionary *addressDictionary = [[placemarks objectAtIndex:0] addressDictionary];
            NSLog(@"Address%@",addressDictionary);
        }
    }];