Check if string null or not

iPhone SDK Tips & Tricks

if([myStr isEqual: [NSNull null]])
NSLog(@"null");
else
NSLog(@"not null");

Crop Image

iPhone SDK Tips & Tricks

UIImageView *tempImageview;

CGRect newRect = CGRectMake(0, 0, newWidth, tempImageview.frame.size.height);

CGImageRef tmp = CGImageCreateWithImageInRect([tempImageview.image CGImage], newRect);

newRect = CGRectMake(tempImageview.frame.origin.x, tempImageview.frame.origin.y, newWidth, tempImageview.frame.size.height);

tempImageview.frame = newRect;

tempImageview.image = [UIImage imageWithCGImage:tmp];