EarlGrey/Additions/UIView+GREYAdditions.h
//
// Copyright 2016 Google Inc.
//
// 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>
NS_ASSUME_NONNULL_BEGIN
/**
* EarlGrey specific additions for traversing and manipulating UIViews.
*/
@interface UIView (GREYAdditions)
/**
* @param klass The target class of subviews.
*
* @return A breadth-first / level ordered array of subviews that can be safely casted to @c klass.
*/
- (NSArray *)grey_childrenAssignableFromClass:(Class)klass;
/**
* Makes sure that subview @c view is always on top, even if other subviews are added in front of
* it. Also keeps the @c view's frame fixed to the current value so parent can't change it.
*
* @param view The view to keep as the top-most fixed subview.
*/
- (void)grey_keepSubviewOnTopAndFrameFixed:(UIView *)view;
/**
* Makes this view and all its super view opaque. Successive calls to this method will replace
* the previously stored alpha value, causing any saved value to be lost.
*
* @remark Each invocation will save the current alpha value which can be restored by calling
* -[UIView grey_restoreOpacity]
*/
- (void)grey_recursivelyMakeOpaque;
/**
* Restores the opacity of this view and it's super views if they were made opaque by calling
* -[UIView grey_recursivelyMakeOpaque]. If -[UIView grey_recursivelyMakeOpaque] was not
* called before, then this method will perform a no-op on each of the view's superviews.
*/
- (void)grey_restoreOpacity;
/**
* Quick check to see if a view meets the basic criteria for visibility:
* 1) Not hidden
* 2) Visible with a minimum alpha
* 3) Valid accessibility frame.
*
* Also checks to if a view is not a subview of another view or window that has a
* translucent alpha value or is hidden.
*/
- (BOOL)grey_isVisible;
@end
NS_ASSUME_NONNULL_END