ae9f89b5d1
Summary:
Currently, our configuration of Views looks like this:
```objc
UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
view.yoga.isEnabled = YES;
view.yoga.height = 50;
view.yoga.width = 50;
```
Every time that we access `view.yoga` we have to access the associated object on `UIView` to get the `YGLayout`. This adds an extra `objc_msgSend` which increases binary size, and is slight perf impact.
This diff creates a way to modify the `YGLayout` with only a single `objc_msgSend`. Here's the new syntax:
```objc
UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
[view configureLayoutWithBlock:^void(YGLayout *layout){
layout.isEnabled = YES
layout.height = 50;
layout.width = 50;
}];
```
Here's the Swift version:
```swift
let view = UIView(frame: .zero)
view.configureLayout { (layout) in
layout.isEnabled = true
layout.height = 50
layout.width = 50
}
```
Closes https://github.com/facebook/yoga/pull/393
Reviewed By: emilsjolander
Differential Revision: D4550382
Pulled By: dshahidehpour
fbshipit-source-id: 76d797d1e0de8e5dc767e02180a7fc440a70212e
37 lines
894 B
Objective-C
37 lines
894 B
Objective-C
/**
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* Copyright (c) 2014-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import "UIView+Yoga.h"
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#import "YGLayout+Private.h"
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#import <objc/runtime.h>
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static const void *kYGYogaAssociatedKey = &kYGYogaAssociatedKey;
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@implementation UIView (YogaKit)
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- (YGLayout *)yoga
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{
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YGLayout *yoga = objc_getAssociatedObject(self, kYGYogaAssociatedKey);
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if (!yoga) {
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yoga = [[YGLayout alloc] initWithView:self];
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objc_setAssociatedObject(self, kYGYogaAssociatedKey, yoga, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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return yoga;
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}
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- (void)configureLayoutWithBlock:(YGLayoutConfigurationBlock)block
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{
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if (block != nil) {
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block(self.yoga);
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}
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}
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@end
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