navigationController导航栏总结

1.设置导航栏标题

self.navigationItem.title = @"标题短发短发短发";

2.设置item颜色（返回按钮颜色－－并不是标题颜色）

[self.navigationController.navigationBar setTintColor:[UIColor whiteColor]];

3.设置导航栏背景色

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

4.导航栏背景图片（同时使用方法3 方法3会失效）

[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];

5.设置导航条标题的字体大小和颜色

self.navigationController.navigationBar.titleTextAttributes=@{NSForegroundColorAttributeName:[UIColor redColor],NSFontAttributeName:[UIFont boldSystemFontOfSize:12]};

6.导航栏的下边线

[self.navigationController.navigationBar setShadowImage:[UIImage new]];//导航栏的的下边线

7.状态栏的颜色

self.navigationController.navigationBar.barStyle = 1;

8.设置导航条颜色渐变

[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];//导航栏的的下边线
UIImageView * viewa = self.navigationController.navigationBar.subviews.firstObject;//导航栏的view
viewa.alpha = 0;
[UIView animateWithDuration:2 animations:^{
    UIImageView * view = self.navigationController.navigationBar.subviews.firstObject;
    view.alpha = 1;
    view.backgroundColor = [UIColor colorWithRed:0.110 green:0.500 blue:1.000 alpha:1.000];
}];

9.设置隐藏导航条（动画）

[self.navigationController setNavigationBarHidden:YES animated:YES];

10.自定义标题View

UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 44)];

title.text = @"title3";

title.textAlignment = NSTextAlignmentCenter;

title.textColor = [UIColor redColor];    

self.navigationItem.titleView = title;