For adding views instantiated from nibs quickly along with opinionated Autolayout Constraints.

UIView+AddSubviewWithConstraints.h

#import <UIKit/UIKit.h>

@interface UIView (AddSubviewWithConstraints)

-(void)addSubview:(UIView *)view withConstraintInsets:(UIEdgeInsets)insets;

@end

UIView+AddSubviewWithConstraints.m

#import "UIView+AddSubviewWithConstraints.h"

@implementation UIView (AddSubviewWithConstraints)

-(void)addSubview:(UIView *)view withConstraintInsets:(UIEdgeInsets)insets
{
	view.translatesAutoresizingMaskIntoConstraints = NO;
	
	[self addSubview:view];
	
	[self addConstraints:@[
						   [NSLayoutConstraint constraintWithItem:view
														attribute:NSLayoutAttributeTop
														relatedBy:NSLayoutRelationEqual
														   toItem:self attribute:NSLayoutAttributeTop
													   multiplier:1.0
														 constant:insets.top],
						   
							[NSLayoutConstraint constraintWithItem:view
														 attribute:NSLayoutAttributeLeading
														 relatedBy:NSLayoutRelationEqual
															toItem:self
														 attribute:NSLayoutAttributeLeading multiplier:1.0
														  constant:insets.left],
						   
							[NSLayoutConstraint constraintWithItem:view
														 attribute:NSLayoutAttributeTrailing
														 relatedBy:NSLayoutRelationEqual
															toItem:self
														 attribute:NSLayoutAttributeTrailing
														multiplier:1.0
														  constant:-insets.right],
						   
							[NSLayoutConstraint constraintWithItem:view
														 attribute:NSLayoutAttributeBottom
														 relatedBy:NSLayoutRelationEqual
															toItem:self
														 attribute:NSLayoutAttributeBottom
														multiplier:1.0
														  constant:-insets.bottom]
						   ]];
	
	[self layoutIfNeeded];
}

@end