例如微博发送微博导航条内容

- (void)viewDidLoad

{

[super viewDidLoad];

UILabel *titleViewLable = [[UILabel alloc] init];

titleViewLable.numberOfLines = 0;

titleViewLable.textAlignment = NSTextAlignmentCenter;

CGFloat titleViewLabelLeft = 0;

CGFloat titleViewLabelTop = 10;

CGFloat titleViewLabelWidth = 200;

CGFloat titleViewLabelHeight = 100;

titleViewLable.frame = CGRectMake(titleViewLabelLeft,

titleViewLabelTop,

titleViewLabelWidth,

titleViewLabelHeight);

NSString *controllerTitle = @"发微博";

NSString *name = @"Evan少";

NSString *titleViewLbelStr = [NSString stringWithFormat:@"%@\n%@",controllerTitle,name];

titleViewLable.text = titleViewLbelStr;

NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:titleViewLbelStr];

[attrStr addAttribute:NSFontAttributeName value:[UIFont boldSystemFontOfSize:16] range:[titleViewLbelStr rangeOfString:controllerTitle]];

[attrStr addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:12] range:[titleViewLbelStr rangeOfString:name]];

titleViewLable.attributedText = attrStr;

self.navigationItem.titleView = titleViewLable;

}