開發IOS APP 經常會根據需求更改狀態欄和導航欄，這里整理了幾種方法，大家可以看下。
導航欄透明
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-(void)viewWillAppear:(BOOL)animated { //viewWillAppear中設置透明 [super viewWillAppear:animated]; [self.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault]; //用空圖片填充機位透明 [self.navigationBar setShadowImage:[UIImage new]];//naviBar底部的seperatorLine}-(void)viewDidDisappear:(BOOL)animated { //viewWillAppear中設置恢復 [super viewDidDisappear:animated]; [self.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault]; [self.navigationBar setShadowImage:shadowImage];} |
導航欄漸變
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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;} |
狀態欄字體顏色改變
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[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleDefault;//黑色[UIApplication sharedApplication].statusBarStyle = UIStatusBarStyleLightContent;//白色 |
導航欄隱藏
如果導航欄自定義度高，需要完全自己重寫，可以隱藏原來的導航欄，并定義一個新的view
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-(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的手勢 _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];// 標題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;} |
原文鏈接：http://www.jianshu.com/p/eca12c72242d
