iOS 状态栏(statusbar)导航栏(navigationsbar)自定义

1. 导航栏透明

-(void)viewWillAppear:(BOOL)animated { //viewWillAppear中设置透明
    [super viewWillAppear:animated];
    [self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault]; //用空图片填充机位透明
    [self.navigationBar setShadowImage:[UIImage new]];//naviBar底部的seperatorLine
}
-(void)viewDidDisappear:(BOOL)animated { //viewWillAppear中设置恢复
    [super viewDidDisappear:animated];
    [self.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
    [self.navigationBar setShadowImage:shadowImage];
}

2. 导航栏渐变

barImageView = self.navigationController.navigationBar.subviews.firstObject;
-(void)scrollViewDidScroll:(UIScrollView *)scrollView {
    CGFloat minAlphaOffset = - 64;
    CGFloat maxAlphaOffset = 200; 
    CGFloat offset = scrollView.contentOffset.y; 
    CGFloat alpha = (offset - minAlphaOffset) / (maxAlphaOffset - minAlphaOffset); _barImageView.alpha = alpha;
}

3. 状态栏字体颜色改变

[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;//黑色
[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;//白色

4. 导航栏隐藏
   • 如果导航栏自定义度高，需要完全自己重写，可以隐藏原来的导航栏，并定义一个新的view

-(void)viewWillAppear:(BOOL)animated {
       [super viewWillAppear:animated];
       self.navigationController.navigationBarHidden = YES;
}
-(void)viewDidDisappear:(BOOL)animated {
       [super viewDidDisappear:animated];
       self.navigationController.navigationBarHidden = NO;
}
-(void)ys_initNavigationBar {
       self.navigationController.interactivePopGestureRecognizer.delegate = (id)self; // 保留右滑pop的手势
       _naviBar = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.width, 64)];
       _naviBar.backgroundColor = [UIColor whiteColor];
       [self.view addSubview:_naviBar];
    
    UIView *line = [[UIView alloc] initWithFrame:CGRectMake(0, _naviBar.height-0.5, self.view.width, 0.5)];
    line.backgroundColor = [UIColor colorForHex:@"f0f0f0"];
    [_naviBar addSubview:line];
    
    // 返回
    backButton = [UIButton buttonWithType:UIButtonTypeCustom];
    backButton.frame = CGRectMake(0, 20, 44, 44);
    [backButton addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:backButton];
    // 标题
    naviLable = [[UIButton alloc] initWithFrame:CGRectMake(44, 20, self.view.width-44*2, 44)];
    naviLable.backgroundColor = [UIColor clearColor];
    naviLable.font = [UIFont systemFontOfSize:16];
    naviLabel.textAlignment = NSTextAlignmentCenter;
    [self.view addSubview: naviLable];
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView {
       //navigationBar change
       CGFloat minAlphaOffset = 0;
       CGFloat maxAlphaOffset = 40;
       CGFloat offset = scrollView.contentOffset.y;
       CGFloat alpha = (offset - minAlphaOffset) / (maxAlphaOffset - minAlphaOffset);
       _naviBar.alpha = alpha;
       naviLabel.alpha = alpha;
}