| // Copyright 2020-present the Material Components for iOS authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #import <UIKit/UIKit.h> |
| |
| @class MDCFlexibleHeaderView; |
| |
| /** |
| The MDCFlexibleHeaderViewDelegate protocol allows a delegate to respond to changes in the header |
| view's state. |
| |
| The delegate is typically the UIViewController that owns this flexible header view. |
| */ |
| @protocol MDCFlexibleHeaderViewDelegate <NSObject> |
| @required |
| |
| /** |
| Informs the receiver that the flexible header view's preferred status bar visibility has changed. |
| */ |
| - (void)flexibleHeaderViewNeedsStatusBarAppearanceUpdate: |
| (nonnull MDCFlexibleHeaderView *)headerView; |
| |
| /** |
| Informs the receiver that the flexible header view's frame has changed. |
| |
| The frame may change in response to scroll events of the tracking scroll view. The receiver |
| should use the MDCFlexibleHeaderView scrollPhase APIs to determine which phase the header's frame |
| is in. |
| */ |
| - (void)flexibleHeaderViewFrameDidChange:(nonnull MDCFlexibleHeaderView *)headerView; |
| |
| @end |
