UILabel标签

UILabel *label = [UILabel alloc] initWithFrame:CGRectMake(CGFloat x, CGFloat y, CGFloat width, CGFloat height);

label.alpha = 1;

label.text = @"标签内容";

label.textColor = @"字体颜色";

label.backgroundColor = [UIColor grayColor];

Center / Left / Right
label.textAlignment = [NSTextAlignmentCenter];

label.layer.cornerRadius = 10;
label.layer.borderColor = [UIColor grayColor].CGColor;
label.layer.borderWidth = 1;

label.layer.borderColor = [UIColor colorWithRed:(CGFloat) green:(CGFloat) blue:(CGFloat) alpha:(CGFloat)];

label .layer.masksToBounds = YES;

label.numberOfLines = NSIntegerMax;  //先设置行数为最大值
[label sizeToFit];

label.shadowColor = [UIColor grayColor];

（向右偏移，向下偏移）
label.shadowOffset = CGSizeMake(CGFloat width, CGFloat height);