MJRefresh/MJRefreshExample/Classes/First/MJNavigationController.m

//  代码地址: https://github.com/CoderMJLee/MJRefresh
//  代码地址: http://code4app.com/ios/%E5%BF%AB%E9%80%9F%E9%9B%86%E6%88%90%E4%B8%8B%E6%8B%89%E4%B8%8A%E6%8B%89%E5%88%B7%E6%96%B0/52326ce26803fabc46000000
//  MJNavigationController.m
//  MJRefreshExample
//
//  Created by MJ Lee on 15/3/5.
//  Copyright (c) 2015年 小码哥. All rights reserved.
//

#import "MJNavigationController.h"
// 判断是否为iOS7
#define iOS7 ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0)

@implementation MJNavigationController

#pragma mark 一个类只会调用一次
+ (void)initialize
{
    // 1.取出设置主题的对象
    UINavigationBar *navBar = [UINavigationBar appearanceWhenContainedIn:[MJNavigationController class], nil];
    
    // 2.设置导航栏的背景图片
    NSString *navBarBg = nil;
    if (iOS7) { // iOS7
        navBarBg = @"NavBar64";
        navBar.tintColor = [UIColor whiteColor];
    } else { // 非iOS7
        navBarBg = @"NavBar";
    }
    [navBar setBackgroundImage:[UIImage imageNamed:navBarBg] forBarMetrics:UIBarMetricsDefault];
    
    // 3.标题
#ifdef __IPHONE_7_0
    [navBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
#else
    [navBar setTitleTextAttributes:@{UITextAttributeTextColor : [UIColor whiteColor]}];
#endif
}
@end