UIView *footerView = [[UIView alloc]initWithFrame:CGRectMake(10, 100, 300, 180)];  UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 300, 150)];  label.text = @"Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Hello world!Hello world! Hello world! Hello world! Hello world! Hello world! Helloworld!";  //背景颜色为红色  label.backgroundColor = [UIColor redColor];  //设置字体颜色为白色  label.textColor = [UIColor whiteColor];  //文字居中显示  label.textAlignment = UITextAlignmentCenter;  //自动折行设置  label.lineBreakMode = UILineBreakModeWordWrap;  label.numberOfLines = 0;