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-(void)viewDidLayoutSubviews{

    [self setDisplayCustomTitleText:@"每日头条"];

}

 #pragma mark - 设置导航栏 self.navigationItem.titleView 居中

 - (void)setDisplayCustomTitleText:(NSString*)text

 {

     CGFloat titleViewHeight = ;

     UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(, , Screen_Width, titleViewHeight)];

     titleView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleLeftMargin |UIViewAutoresizingFlexibleRightMargin;

     titleView.autoresizesSubviews = YES;

     titleView.backgroundColor = [UIColor clearColor];

     UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(, , Screen_Width, titleViewHeight)];

     titleLabel.backgroundColor = [UIColor clearColor];

     titleLabel.font = [UIFont systemFontOfSize:];

     titleLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;

     titleLabel.textColor = kMyColor(, , );

     titleLabel.textAlignment = NSTextAlignmentCenter;

     CGRect leftViewbounds = self.navigationItem.leftBarButtonItem.customView.bounds;

     CGRect rightViewbounds = self.navigationItem.rightBarButtonItem.customView.bounds;

     CGRect frame;

     CGFloat maxWidth = leftViewbounds.size.width > rightViewbounds.size.width ? leftViewbounds.size.width : rightViewbounds.size.width;

     maxWidth += ;//leftview 左右都有间隙，左边是5像素，右边是8像素，加2个像素的阀值 5 ＋ 8 ＋ 2

     frame = titleLabel.frame;

     frame.size.width = Screen_Width - maxWidth * ;

     titleLabel.frame = frame;

     frame = titleView.frame;

     frame.size.width = Screen_Width - maxWidth * ;

     titleView.frame = frame;

     titleLabel.text = text;

     [titleView addSubview:titleLabel];

     self.navigationItem.titleView = titleView;

 }