iOS如何为导航栏添加播放动画

#import <UIKit/UIKit.h>@interface FLAudioVisualizerView : UIView#pragma mark -// 默认UIEdgeInsetsZero@property (nonatomic, assign) UIEdgeInsets contentInsets;// 默认为4@property (nonatomic, assign) NSInteger barCount;@property (nonatomic, copy) NSArray<NSNumber *> *barHeightRateList;// 默认白色@property (nonatomic, copy) UIColor *barColor;// 默认2@property (nonatomic, assign) CGFloat cornerRadius;// 默认5@property (nonatomic, assign) CGFloat barSpace;// NSValue包装CGPoint@property (nonatomic, strong) NSArray<NSValue *> *aniamteOffsetList;@property (nonatomic, readonly) BOOL isAniamting;- (void)restart;- (void)start;- (void)stop;@end

#import "FLAudioVisualizerView.h"@interface FLAudioVisualizerView ()@property (nonatomic, strong) NSArray<UIView *> *barList;@property (nonatomic, assign) BOOL isAniamting;@end@implementation FLAudioVisualizerView#pragma mark -- (id)initWithFrame:(CGRect)frame{  if (self = [super initWithFrame:frame]) {    [self setBarCount:4];    _barSpace = 5;    _barColor = [UIColor whiteColor];    self.cornerRadius = 2;    self.barHeightRateList = @[@(0.4), @(0.75), @(0.55), @(0.95)];    self.transform = CGAffineTransformMakeRotation(M_PI);    self.aniamteOffsetList = @[[NSValue valueWithCGPoint:CGPointMake(0.1, 0.4)],                  [NSValue valueWithCGPoint:CGPointMake(0.75, 0.3)],                  [NSValue valueWithCGPoint:CGPointMake(0.2, 0.55)],                  [NSValue valueWithCGPoint:CGPointMake(0.94, 0.4)],                  ];    self.contentInsets = UIEdgeInsetsZero;  }  return self;}- (void)layoutSubviews{  [super layoutSubviews];  CGRect rect = self.bounds;  if (fabs(rect.size.width) < 1e-3 || fabs(rect.size.height) < 1e-3 || rect.size.width < 0 || rect.size.height < 0 ) {    return;  }  rect = CGRectWithEdgeInserts(rect, self.contentInsets);  __block CGRect barRect = rect;  barRect.size.width = (rect.size.width - (self.barCount - 1) * self.barSpace) / self.barCount;  NSArray<NSNumber *> *barHeightRateList = self.barHeightRateList.reverseObjectEnumerator.allObjects;  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    obj.layer.anchorPoint = CGPointZero;    CGFloat rate = 1.0;    if (idx < barHeightRateList.count) rate = barHeightRateList[idx].floatValue;    barRect.size.height = rect.size.height * rate;    obj.frame = barRect;    barRect.origin.x += barRect.size.width + self.barSpace;  }];}#pragma mark -static CGRect CGRectWithEdgeInserts(CGRect rect, UIEdgeInsets inserts){  rect.origin.x += inserts.left;  rect.origin.y += inserts.top;  rect.size.width -= inserts.left + inserts.right;  rect.size.height -= inserts.top + inserts.bottom;  return rect;}#pragma mark -- (void)setBarCount:(NSInteger)barCount{  _barCount = barCount;  NSInteger diff = self.barList.count - barCount;  if (diff > 0) {    NSArray<UIView *> *removeBarViewList = [self.barList subarrayWithRange:NSMakeRange(barCount, diff)];    [removeBarViewList makeObjectsPerformSelector:@selector(removeFromSuperview)];    self.barList = [self.barList subarrayWithRange:NSMakeRange(0, barCount)];  } else if (diff < 0) {    diff = -diff;    NSMutableArray *addBarViewList = [NSMutableArray arrayWithCapacity:diff];    for (NSInteger index = 0; index < diff; index ++) {      UIView *imageView = [[UIView alloc] init];      imageView.clipsToBounds = YES;      imageView.layer.cornerRadius = self.cornerRadius;      [addBarViewList addObject:imageView];      imageView.backgroundColor = [UIColor whiteColor];    }    if (self.barList) {      self.barList = [self.barList arrayByAddingObjectsFromArray:addBarViewList];    } else {      self.barList = addBarViewList;    }  }  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    [self addSubview:obj];  }];}- (void)setCornerRadius:(CGFloat)cornerRadius{  _cornerRadius = cornerRadius;  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    obj.layer.cornerRadius = cornerRadius;  }];}- (void)setBarColor:(UIColor *)barColor{  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    obj.backgroundColor = barColor;  }];}- (void)aniamteWithBar:(UIView *)bar startHeight:(CGFloat)startHeight endHeight:(CGFloat)endHeight{  CABasicAnimation * animation;  animation = [CABasicAnimation animationWithKeyPath:@"bounds.size.height"];  animation.fromValue = [NSNumber numberWithFloat:startHeight];  animation.toValue = [NSNumber numberWithFloat:endHeight];  animation.duration = 0.25;  animation.repeatCount = MAXFLOAT;  animation.autoreverses = YES;  [bar.layer addAnimation:animation forKey:@"bounds.size.height"];}- (void)restart{  [self stop];  [self start];}- (void)start{  if (self.isAniamting) return;  self.isAniamting = YES;  NSArray<NSValue *> *aniamteOffsetList = self.aniamteOffsetList.reverseObjectEnumerator.allObjects;  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    if (idx < aniamteOffsetList.count) {      CGRect rect = CGRectWithEdgeInserts(self.bounds, self.contentInsets);      CGPoint offset = aniamteOffsetList[idx].CGPointValue;      [self aniamteWithBar:obj startHeight:rect.size.height * offset.x endHeight:rect.size.height * offset.y];    }  }];}- (void)stop{  self.isAniamting = NO;  [self.barList enumerateObjectsUsingBlock:^(UIView * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {    [obj.layer removeAllAnimations];  }];}@end

#import "ViewController.h"#import "FLAudioVisualizerView.h"#define kScreen_width [UIScreen mainScreen].bounds.size.width#define SCREEN_HEIGHT [UIScreen mainScreen].bounds.size.height@interface ViewController ()@property (nonatomic, strong) FLAudioVisualizerView *visualizerView;@end@implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];  self.view.backgroundColor = [UIColor whiteColor];    self.title = @"首页";  //修改导航栏标题字体大小和颜色,背景颜色  [self.navigationController.navigationBar setBarTintColor:[UIColor whiteColor]];  [self.navigationController.navigationBar setTitleTextAttributes:@{                                   NSFontAttributeName:[UIFont systemFontOfSize:17],NSForegroundColorAttributeName:[UIColor blackColor]                                   }];  UIButton *playBtn = [UIButton buttonWithType:UIButtonTypeCustom];  playBtn.frame = CGRectMake(10, 100, 100, 20);  [self.view addSubview:playBtn];  [playBtn setTitle:@"开始播放" forState:UIControlStateNormal];  [playBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  [playBtn addTarget:self action:@selector(playClick) forControlEvents:UIControlEventTouchUpInside];    UIButton *stopPlayBtn = [UIButton buttonWithType:UIButtonTypeCustom];  stopPlayBtn.frame = CGRectMake(10, 150, 100, 20);  [self.view addSubview:stopPlayBtn];  [stopPlayBtn setTitle:@"停止播放" forState:UIControlStateNormal];  [stopPlayBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];  [stopPlayBtn addTarget:self action:@selector(stopPlayBtnClick) forControlEvents:UIControlEventTouchUpInside];  [self setupVisualizerView];}- (void)setupVisualizerView{  CGSize size = CGSizeMake(23, 22);  UIEdgeInsets insets = UIEdgeInsetsMake(10, 0, 10, 20);  size.width += insets.left + insets.right;  size.height += insets.top + insets.bottom;  // 直接直接使用visualizerView的时候，在侧滑返回的时候，会出现很奇怪的现象，visualizerView的frame会发生变化，导致显示异常  UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, size.width, size.height)];  FLAudioVisualizerView *visualizerView = [[FLAudioVisualizerView alloc] initWithFrame:CGRectMake(0, 0, size.width, size.height)];  self.visualizerView = visualizerView;  [containerView addSubview:visualizerView];  visualizerView.barColor = [UIColor colorWithRed:63/255 green:63/255 blue:64/255 alpha:1];  visualizerView.contentInsets = insets;  UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(gotoCurrentPlayPage)];  [containerView addGestureRecognizer:tap];  UIBarButtonItem *barItem = [[UIBarButtonItem alloc] initWithCustomView:containerView];  self.navigationItem.rightBarButtonItem = barItem;        }- (void)gotoCurrentPlayPage{  NSLog(@"点击了播放按钮");}- (void)playClick{  NSLog(@"1");  [self.visualizerView restart];}- (void)stopPlayBtnClick{  NSLog(@"2");  [self.visualizerView stop];}- (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];  // Dispose of any resources that can be recreated.}@end