96 lines
2.5 KiB
Objective-C
96 lines
2.5 KiB
Objective-C
//
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// SCNightModeButton.m
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// SCCamera
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//
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// Created by Liu Liu on 3/19/15.
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// Copyright (c) 2015 Snapchat, Inc. All rights reserved.
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//
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#import "SCNightModeButton.h"
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#import <SCFoundation/SCAssertWrapper.h>
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static NSTimeInterval const kSCNightModeButtonHiddenDelay = 2.5;
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@implementation SCNightModeButton {
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dispatch_block_t _delayedHideBlock;
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}
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- (instancetype)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self) {
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self.image = [UIImage imageNamed:@"camera_nightmode_off_v10"];
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self.imageInset = CGSizeMake((CGRectGetWidth(self.bounds) - self.image.size.width) / 2,
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(CGRectGetHeight(self.bounds) - self.image.size.height) / 2);
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}
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return self;
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}
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- (void)setSelected:(BOOL)selected
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{
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SC_GUARD_ELSE_RETURN(_selected != selected);
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if (selected) {
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[self _cancelDelayedHideAnimation];
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self.image = [UIImage imageNamed:@"camera_nightmode_on_v10"];
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} else {
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self.image = [UIImage imageNamed:@"camera_nightmode_off_v10"];
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}
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self.imageInset = CGSizeMake((CGRectGetWidth(self.bounds) - self.image.size.width) / 2,
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(CGRectGetHeight(self.bounds) - self.image.size.height) / 2);
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_selected = selected;
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}
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- (void)show
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{
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SC_GUARD_ELSE_RETURN(self.hidden);
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SCAssertMainThread();
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[self _cancelDelayedHideAnimation];
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self.hidden = NO;
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[self animate];
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}
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- (void)hideWithDelay:(BOOL)delay
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{
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SC_GUARD_ELSE_RETURN(!self.hidden);
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SCAssertMainThread();
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[self _cancelDelayedHideAnimation];
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if (delay) {
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@weakify(self);
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_delayedHideBlock = dispatch_block_create(0, ^{
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@strongify(self);
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SC_GUARD_ELSE_RETURN(self);
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[UIView animateWithDuration:0.3
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animations:^{
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self.alpha = 0;
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}
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completion:^(BOOL finished) {
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self.alpha = 1;
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self.hidden = YES;
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_delayedHideBlock = nil;
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}];
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});
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dispatch_time_t delayTime =
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dispatch_time(DISPATCH_TIME_NOW, (int64_t)(kSCNightModeButtonHiddenDelay * NSEC_PER_SEC));
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dispatch_after(delayTime, dispatch_get_main_queue(), _delayedHideBlock);
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} else {
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self.hidden = YES;
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}
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}
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- (BOOL)willHideAfterDelay
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{
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return _delayedHideBlock != nil;
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}
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#pragma mark - Private
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- (void)_cancelDelayedHideAnimation
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{
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SC_GUARD_ELSE_RETURN(_delayedHideBlock);
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dispatch_cancel(_delayedHideBlock);
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_delayedHideBlock = nil;
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}
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@end
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