iOS:导航栏的属性的一些自定义方法

1、改变导航栏标题样色

#define RGB(r,g,b)  [UIColor colorWithRed:r / 255.0 green:g / 255.0 blue:b /255.0 alpha:1]

[self.navigationController.navigationBar setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:RGB(56, 141, 205),NSForegroundColorAttributeName,nil]];

2、改变导航栏背景色

 [self.navigationController.navigationBar setBackgroundColor:[UIColor grayColor]];

3、自定义导航栏返回按钮

- (void)showBackBtn

{

    //自定义返回按钮

    UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];

    //    UIImageView *image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"arrow_back.png"]];

    //    image.frame = CGRectMake(0, 0, 20, 20);

    //[backButton addSubview:image];

    [backButton setBackgroundImage:[UIImage imageNamed:@"返回icon.png"]forState:UIControlStateNormal];

    backButton.backgroundColor = [UIColor clearColor];

    [backButton addTarget:self action:@selector(popViewConDelay) forControlEvents:UIControlEventTouchUpInside];

    backButton.frame = CGRectMake(0, 0, 15, 20);

    UIBarButtonItem *detailsItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];

    

    UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]

                                       initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace

                                       target:nil action:nil];

    /**

     *  width为负数时，相当于btn向右移动width数值个像素，由于按钮本身和边界间距为5pix，所以width设为-5时，间距正好调整

     *  为0；width为正数时，正好相反，相当于往左移动width数值个像素

     */

    negativeSpacer.width = 10;

    self.navigationItem.hidesBackButton = YES;

    

    self.navigationItem.leftBarButtonItems = [NSArray arrayWithObjects: negativeSpacer,detailsItem, nil];

    

    

}

- (void)popViewConDelay

{

    [self.navigationController popViewControllerAnimated:YES];

}