How to increase height of UIProgressView

Use CGAffineTransform to change dimensions:

CGAffineTransform transform = CGAffineTransformMakeScale(1.0f, 3.0f);  
progressView.transform = transform;

Using layout constraints worked for me:

place this source

@implementation UIProgressView (customView)
- (CGSize)sizeThatFits:(CGSize)size {
    CGSize newSize = CGSizeMake(self.frame.size.width, 9);
    return newSize;
}
@end