- (void)viewDidLoad {    [super viewDidLoad];            UILabel *labelLoginname = [[UILabel alloc] initWithFrame:CGRectMake(0,0,0,0)];    //[labelLoginname setNumberOfLines:0];    NSString *s = @"账号：";    UIFont *font = [UIFont fontWithName:@"Arial" size:15];    CGSize size = CGSizeMake(0,0);    NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:15]};    CGSize labelsize = [s boundingRectWithSize:size options: NSStringDrawingUsesFontLeading  attributes:attribute context:nil].size;        labelLoginname.frame = CGRectMake(80.0, 80.0, labelsize.width, labelsize.height);    labelLoginname.backgroundColor = [UIColor whiteColor];    labelLoginname.textColor = [UIColor blackColor];    labelLoginname.text = s;    labelLoginname.font = font;        [self.view addSubview:labelLoginname];
}