80 lines
2.5 KiB
Objective-C
80 lines
2.5 KiB
Objective-C
//
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// BlurAppScreen.m
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// Mattermost
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//
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// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
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// See License.txt for license information.
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//
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#import "BlurAppScreen.h"
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#import "UIImage+ImageEffects.h"
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@implementation BlurAppScreen{
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BOOL enabled;
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UIImageView *obfuscatingView;
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}
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RCT_EXPORT_MODULE();
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+ (BOOL)requiresMainQueueSetup
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{
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return YES;
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}
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- (instancetype)init {
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if ((self = [super init])) {
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(handleAppStateResignActive)
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name:UIApplicationWillResignActiveNotification
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object:nil];
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[[NSNotificationCenter defaultCenter] addObserver:self
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selector:@selector(handleAppStateActive)
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name:UIApplicationDidBecomeActiveNotification
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object:nil];
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}
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return self;
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}
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- (void)dealloc
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationWillResignActiveNotification object:nil];
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[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidBecomeActiveNotification object:nil];
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}
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- (void)handleAppStateResignActive {
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if (self->enabled) {
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UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow;
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UIImageView *blurredScreenImageView = [[UIImageView alloc] initWithFrame:keyWindow.bounds];
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UIGraphicsBeginImageContext(keyWindow.bounds.size);
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[keyWindow drawViewHierarchyInRect:keyWindow.frame afterScreenUpdates:NO];
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UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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blurredScreenImageView.image = [viewImage applyLightEffect];
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self->obfuscatingView = blurredScreenImageView;
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[[UIApplication sharedApplication].keyWindow addSubview:self->obfuscatingView];
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}
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}
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- (void)handleAppStateActive {
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if (self->obfuscatingView) {
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[UIView animateWithDuration: 0.3
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animations: ^ {
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self->obfuscatingView.alpha = 0;
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}
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completion: ^(BOOL finished) {
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[self->obfuscatingView removeFromSuperview];
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self->obfuscatingView = nil;
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}
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];
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}
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}
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RCT_EXPORT_METHOD(enabled:(BOOL) _enable) {
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self->enabled = _enable;
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}
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@end
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