设置导航条标题及背景图片

#import "XMGNavigationViewController.h"

@interface XMGNavigationViewController ()

@end

@implementation XMGNavigationViewController
+ (void)load
{
    UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:self, nil];
    
    // 只要是通过模型设置,都是通过富文本设置
    // 设置导航条标题 => UINavigationBar
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
    attrs[NSFontAttributeName] = [UIFont boldSystemFontOfSize:20];
    [navBar setTitleTextAttributes:attrs];
    
    // 设置导航条背景图片
    [navBar setBackgroundImage:[UIImage imageNamed:@"navigationbarBackgroundWhite"] forBarMetrics:UIBarMetricsDefault];
}