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TUIKit/TUIMultimediaPlugin/Edit/TUIMultimediaFakeAudioWaveView.m

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+// Copyright (c) 2024 Tencent. All rights reserved.
+// Author: eddardliu
+
+#import "TUIMultimediaFakeAudioWaveView.h"
+#import <Masonry/Masonry.h>
+#import "TUIMultimediaPlugin/TUIMultimediaCommon.h"
+#import "TUIMultimediaPlugin/TUIMultimediaGeometry.h"
+
+@interface TUIMultimediaFakeAudioWaveView () {
+    dispatch_source_t _timer;
+}
+
+@end
+
+@implementation TUIMultimediaFakeAudioWaveView
+- (id)initWithFrame:(CGRect)frame {
+    self = [super initWithFrame:frame];
+    if (self != nil) {
+        self.backgroundColor = UIColor.clearColor;
+        _color = UIColor.grayColor;
+        _lineWidth = 1.5;
+        _lineSpacing = 0.5;
+        _animeInterval = 0.2;
+        _enabled = NO;
+
+        _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, dispatch_get_main_queue());
+        dispatch_source_set_timer(_timer, DISPATCH_TIME_NOW, _animeInterval * NSEC_PER_SEC, _animeInterval * NSEC_PER_SEC);
+        dispatch_source_set_event_handler(_timer, ^{
+          [self setNeedsDisplay];
+        });
+        dispatch_activate(_timer);
+        dispatch_suspend(_timer);
+    }
+    return self;
+}
+
+- (void)drawRect:(CGRect)rect {
+    [super drawRect:rect];
+    [_color set];
+    CGFloat x = 0;
+    CGFloat selfWidth = self.bounds.size.width;
+    CGFloat selfHeight = self.bounds.size.height;
+    while (x + _lineWidth < selfWidth) {
+        CGFloat h = (CGFloat)arc4random() / UINT32_MAX * selfHeight;
+        UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(x, selfHeight - h, _lineWidth, selfHeight)];
+        [path fill];
+        x += _lineWidth + _lineSpacing;
+    }
+}
+
+#pragma mark - Properties
+- (void)setColor:(UIColor *)color {
+    _color = color;
+    [self setNeedsDisplay];
+}
+
+- (void)setEnabled:(BOOL)enabled {
+    if (_enabled && !enabled) {
+        dispatch_suspend(_timer);
+    } else if (!_enabled && enabled) {
+        dispatch_resume(_timer);
+    }
+    _enabled = enabled;
+}
+
+- (void)setAnimeInterval:(CGFloat)animeInterval {
+    _animeInterval = animeInterval;
+    dispatch_source_set_timer(_timer, DISPATCH_TIME_NOW, _animeInterval * NSEC_PER_SEC, _animeInterval * NSEC_PER_SEC);
+}
+
+@end