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https://github.com/material-components/material-components-ios.git
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10e11da725
Reviewers: O1 Material components iOS, ajsecord Reviewed By: O1 Material components iOS, ajsecord Subscribers: ajsecord Tags: #material_components_ios Differential Revision: http://codereview.cc/D1304
86 lines
2.1 KiB
Objective-C
86 lines
2.1 KiB
Objective-C
/*
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Copyright 2016-present Google Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "MDCHeaderStackView.h"
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@implementation MDCHeaderStackView
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- (CGSize)sizeThatFits:(CGSize)size {
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if (_bottomBar) {
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size.height = [_bottomBar sizeThatFits:size].height;
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} else {
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size.height = [_topBar sizeThatFits:size].height;
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}
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return size;
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}
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- (void)layoutSubviews {
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[super layoutSubviews];
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CGSize boundsSize = self.bounds.size;
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CGSize topBarSize = [_topBar sizeThatFits:boundsSize];
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CGSize bottomBarSize = [_bottomBar sizeThatFits:boundsSize];
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CGFloat remainingHeight = boundsSize.height - topBarSize.height - bottomBarSize.height;
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CGRect topBarFrame = (CGRect){CGPointZero, topBarSize};
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CGRect bottomBarFrame = (CGRect){CGPointZero, bottomBarSize};
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if (remainingHeight > 0) {
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// Expand the top bar to fill the remaining height.
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topBarFrame.size.height += remainingHeight;
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} else if (remainingHeight < 0) {
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// Negative value causes the top bar to slide up and away.
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topBarFrame.origin.y += remainingHeight;
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}
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bottomBarFrame.origin.y = CGRectGetMaxY(topBarFrame);
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_topBar.frame = topBarFrame;
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_bottomBar.frame = bottomBarFrame;
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}
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#pragma mark - Public
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- (void)setTopBar:(UIView *)topBar {
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if (_topBar == topBar) {
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return;
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}
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[_topBar removeFromSuperview];
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_topBar = topBar;
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[self addSubview:_topBar];
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[self setNeedsLayout];
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}
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- (void)setBottomBar:(UIView *)bottomBar {
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if (_bottomBar == bottomBar) {
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return;
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}
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[_bottomBar removeFromSuperview];
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_bottomBar = bottomBar;
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[self addSubview:_bottomBar];
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[self setNeedsLayout];
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}
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@end
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