iOS开发之设置导航栏标题的字体大小和颜色

UILabel *titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 44)];
titleLabel.backgroundColor = [UIColor grayColor];
titleLabel.font = [UIFont boldSystemFontOfSize:20];
titleLabel.textColor = [UIColor blueColor];
titleLabel.textAlignment = NSTextAlignmentCenter;
titleLabel.text = @"导航栏标题";
self.navigationItem.titleView = titleLabel;

self.navigationItem.title = @"导航栏标题";
[self.navigationController.navigationBar setTitleTextAttributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:18],NSForegroundColorAttributeName:[UIColor blueColor]}];