iOS导航栏

1.自定义导航栏返回按钮

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1.首先得到一个UIImage对象

    UIImage *backButtonImage = [[UIImage imageNamed:@"fanhui.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 30, 0, 0)];

2.全局替换或者仅一个导航栏替换

//全局替换
    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

//单个导航栏设置
    [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(NSIntegerMin, NSIntegerMin) forBarMetrics:UIBarMetricsDefault];

3.让按钮文字不在屏幕中显示

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

2.设置系统导航栏的颜色

 UINavigationBar *appearance = [UINavigationBar appearance];
    // 设置导航条背景颜色，在iOS7才这么用
    [appearance setBarTintColor:[UIColor blueColor]];
    //        [appearance setBackgroundColor:[BaseColor colorWithNav]];
    // 设置导航条的返回按钮或者系统按钮的文字颜色，在iOS7才这么用
    [appearance setTintColor:[UIColor whiteColor]];
    // 设置导航条的title文字颜色，在iOS7才这么用
    [appearance setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
                                        [UIColor whiteColor], NSForegroundColorAttributeName, [UIFont systemFontOfSize:17], NSFontAttributeName, nil]];

3.隐藏显示状态栏和更改颜色

plist中

B1F0F438-6160-42C7-BF11-303A0F8C2379.png

//显示状态栏
    [[UIApplication sharedApplication]setStatusBarHidden:NO];
    //将状态栏颜色设为白色
    [[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

4.导航栏透明

使用透明图片将导航栏变为透明

nav_bargound.png

#pragma mark - 视图将要出现
- (void)viewWillAppear:(BOOL)animated
{
    //导航栏背景
    [self.navigationController.navigationBar setBackgroundImage:[UIImage imageNamed:@"nav_bargound.png"] forBarMetrics:UIBarMetricsDefault];
    
    //导航栏底部线
    self.navigationController.navigationBar.shadowImage =[UIImage imageNamed:@"nav_bargound.png"];
}
#pragma mark - 视图将要消失
- (void)viewWillDisappear:(BOOL)animated
{
    //导航栏背景
    [self.navigationController.navigationBar setBackgroundImage:nil forBarMetrics:UIBarMetricsDefault];
    
    //导航栏底部线
    self.navigationController.navigationBar.shadowImage =[UIImage imageNamed:@""];
}