阴影的shareoff详解

x向右为正，y向下为正

1.y<0

 UILabel *label=[[UILabelalloc] initWithFrame:CGRectMake(40,40, 250,50)];

    label.backgroundColor=[UIColorclearColor];

    label.textColor=[UIColorredColor];

    label.text=@"和合谷";

    label.shadowColor=[UIColorblueColor];

    label.shadowOffset=CGSizeMake(0, -3);

20140506105608125.png

第二.y>0

 UILabel *label=[[UILabelalloc] initWithFrame:CGRectMake(40,40, 250,50)];

    label.backgroundColor=[UIColorclearColor];

    label.textColor=[UIColorredColor];

    label.text=@"和合谷";

    label.shadowColor=[UIColorblueColor];

    label.shadowOffset=CGSizeMake(0,3);

20140506105805656.png

第三、x>0

 UILabel *label=[[UILabelalloc] initWithFrame:CGRectMake(40,40, 250,50)];

    label.backgroundColor=[UIColorclearColor];

    label.textColor=[UIColorredColor];

    label.text=@"和合谷";

    label.shadowColor=[UIColorblueColor];

    label.shadowOffset=CGSizeMake(3,0);

    [self.viewaddSubview:label];

20140506105933171.png

第四、x<0

UILabel *label=[[UILabelalloc] initWithFrame:CGRectMake(40,40, 250,50)];

    label.backgroundColor=[UIColorclearColor];

    label.textColor=[UIColorredColor];

    label.text=@"和合谷";

    label.shadowColor=[UIColorblueColor];

    label.shadowOffset=CGSizeMake(-3,0);

20140506110142015.png