自定义airplay button

来源：互联网发布：日语翻译兼职知乎编辑：程序博客网时间：2024/06/02 16:23

自定义一个全局的button，然后添加MPVolumeView拿到里面的button进行更换。

MPVolumeView *volumeView = [[MPVolumeView alloc] initWithFrame:CGRectMake(260, 407, 40, 40)];

[volumeView setShowsVolumeSlider:NO];

for (UIButton *button in volumeView.subviews) {

if ([button isKindOfClass:[UIButton class]]) {

self.airplayButton = button;

self.airplayButton.showsTouchWhenHighlighted = NO;

[self.airplayButton setImage:[UIImage imageNamed:@"fav_audios_airplay.png"]forState:UIControlStateNormal];

[self.airplayButton setBounds:CGRectMake(0, 0, 40, 40)];

[self.airplayButton addObserver:self forKeyPath:@"alpha" options:NSKeyValueObservingOptionNewcontext:nil];

}

[volumeView sizeToFit];

[self.view addSubview:volumeView];

还需要添加这一段来设置多一次图片和大小

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context {

if ([object isKindOfClass:[UIButton class]] && [[change valueForKey:NSKeyValueChangeNewKey] intValue] ==1) {

[(UIButton *) object setImage:[UIImage imageNamed:@"fav_audios_airplay.png"]forState:UIControlStateNormal];

[(UIButton *) object setBounds:CGRectMake(0, 0, 40, 40)];

}

在dealloc里面移除

- (void)dealloc {

[self.airplayButton removeObserver:self forKeyPath:@"alpha"];

}