设置导航栏

设置导航栏背景图片为一个空的image，这样就透明了,一般情况下我们在

-(void)viewWillAppear:(BOOL)animated{
//设置导航栏为透明
}

-(void)viewWillDisappear:(BOOL)animated{
//还原导航栏的颜色
}

设置导航栏为透明的

设置导航栏背景图片为一个空的image，这样就透明了
[self.navigationController.navigationBar setBackgroundImage:[[UIImage alloc] init] forBarMetrics:UIBarMetricsDefault];

去掉透明后导航栏下边的黑边
[self.navigationController.navigationBar setShadowImage:[[UIImage alloc] init]];

还原导航栏的颜色

把之前加上的image设置为nil
[self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:nil];

设置导航栏两边按钮的颜色

self.navigationController.navigationBar.tintColor = [UIColor whiteColor];

隐藏返回按钮 右边的文字

[[UIBarButtonItem appearance]setBackButtonTitlePositionAdjustment:UIOffsetMake(NSIntegerMin, NSIntegerMin) forBarMetrics:UIBarMetricsDefault];

导航栏上的自定义标题

//自定义标题视图
    UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0,0, 200, 44)];
    titleLabel.backgroundColor = [UIColor clearColor];
    titleLabel.font = [UIFont boldSystemFontOfSize:17];
    titleLabel.textColor = [UIColor whiteColor];
    titleLabel.textAlignment = NSTextAlignmentCenter;
    titleLabel.text = @"个人资料";
    self.navigationItem.titleView = titleLabel;

导航栏的颜色

self.navigationController.navigationBar.barTintColor = [UIColor redColor];

导航栏的透明度

不透明
 self.navigationController.navigationBar.translucent = NO;

半透明
 self.navigationController.navigationBar.translucent = YES;

导航栏的跳转

返回到上个页面
[self.navigationController popViewControllerAnimated:YES];

返回到第一个页面
[self.navigationController popToRootViewControllerAnimated:YES];

返回到指定的页面
NSArray *temArray = self.navigationController.viewControllers;
for(UIViewController *temVC in temArray){
     if ([temVC isKindOfClass:[VillagersViewController class]]){
         [self.navigationController popToViewController:temVC animated:YES];
     }
}