UIButton *leftBtn = [UIButtonbuttonWithType:UIButtonTypeCustom];

    [leftBtn setTitleColor:lightBlueforState:UIControlStateNormal];

    leftBtn.backgroundColor = [UIColorclearColor];

    leftBtn.frame =CGRectMake(0,0, 60, 44);

    [leftBtn addTarget:selfaction:@selector(backClick)forControlEvents:UIControlEventTouchUpInside];

   UIImageView *backImage = [[UIImageViewalloc]initWithFrame:CGRectMake(0,12, 12, 20)];

    backImage.image = [UIImageimageNamed:@"back"];

    [leftBtnaddSubview:backImage];

   UILabel* middleLabel = [[UILabelalloc]init];

    middleLabel.textColor = [UIColorwhiteColor];

    middleLabel.frame =CGRectMake(0,0, 120, 44);

    middleLabel.textAlignment =NSTextAlignmentCenter;

    middleLabel.font = [UIFontboldSystemFontOfSize:24.0];

    middleLabel.backgroundColor = [UIColorclearColor];

    middleLabel.text =@"XXXX";

    UIBarButtonItem *left = [[UIBarButtonItemalloc]initWithCustomView:leftBtn];

    self.navigationItem.leftBarButtonItem = left;

    self.navigationItem.titleView = middleLabel;

   if (version<7.0) {

        self.navigationController.navigationBar.tintColor = lightBlue;

    }else {

        self.navigationController.navigationBar.barTintColor = lightBlue;

        self.navigationController.navigationBar.translucent = NO;

    }

自定义导航条 文字大小颜色等 按钮大小图标等 背景色