MissingAnchors

Backport of Apple NSLayoutAnchor API to iOS7 and some missings like sizeAnchor and edgesAnchor.

Usage

Backported all default anchor methods:

• view.leadingAnchor
• view.trailingAnchor
• view.leftAnchor
• view.rightAnchor
• view.topAnchor
• view.bottomAnchor
• view.widthAnchor
• view.heightAnchor
• view.centerXAnchor
• view.centerYAnchor
• view.firstBaselineAnchor
• view.lastBaselineAnchor

Additional implemented anchors:

• view.sizeAnchor
• view.edgesAnchor

With some additional methods on anchors:

• anchor.withTopAnchor
• anchor.withBottomAnchor
• anchor.withLeadingAnchor
• anchor.withTrailingAnchor
• edgesAnchor.withoutTopAnchor
• edgesAnchor.withoutBottomAnchor
• edgesAnchor.withoutLeadingAnchor
• edgesAnchor.withoutTrailingAnchor

Usage example:

#import <MissingAnchors/MissingAnchors.h>

...

[view1.edgesAnchor constraintsEqualToConstant:UIEdgeInsetsMake(10, 20, 30, 40)].active = YES;
[view2.topAnchor.withBottomAnchor constraintsEqualToConstant:UIEdgeInsetsMake(10, 0, 30, 0)].active = YES;
[view3.edgesAnchor.withoutTopAnchor constraintsEqualToConstant:UIEdgeInsetsMake(0, 20, 30, 40)].active = YES;

Modern active property:

#import <MissingAnchors/MissingAnchors.h>

...

@[
   [view1.topAnchor constraintEqualToAnchor:self.view.topAnchor constant:10],
   [view1.leftAnchor constraintEqualToAnchor:self.view.leftAnchor constant:20],
   [view1.bottomAnchor constraintEqualToAnchor:self.view.bottomAnchor constant:-30],
   [view1.rightAnchor constraintEqualToAnchor:self.view.rightAnchor constant:-40],
].active = YES;

Installation

MissingAnchors is available through CocoaPods. To install it, simply add the following line to your Podfile:

pod 'MissingAnchors'
pod 'MissingAnchors/NSLayoutAnchor' # if you need a backport of NSLayoutAnchor to iOS 7

Or, if you’re using Carthage, simply add MissingAnchors to your Cartfile:

github "k06a/MissingAnchors"

Author

Anton Bukov, k06aaa@gmail.com

License

MissingAnchors is available under the MIT license. See the LICENSE file for more info.