设置导航栏颜色和字体颜色

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

//    // 导航栏背景

//    [self.navigationController.navigationBar setBackgroundImage:[UIImage p_w_picpathNamed:@"navigationImage_2.png"] forBarMetrics:UIBarMetricsDefault];

//    

//    self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

//    // 导航栏透明

//    [self.navigationController.navigationBar setBackgroundImage:[UIImage p_w_picpathNamed:@"talk_icon_03.png"] forBarMetrics:UIBarMetricsCompact];

//    // 设置样式,不加这句话会有横线

//    self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

    // 修改title字体颜色

    [self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[UIColor blackColor]}];

    self.navigationController.navigationBar.barTintColor = HexRGB(0X62ccca);

    // 修改返回箭头颜色样式

    UIImage *backButtonImage = [[UIImage p_w_picpathNamed:@"talk_icon_03.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 30, 0, 0)];

    [[UIBarButtonItem appearance] setBackButtonBackgroundImage:backButtonImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

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