我有一个 UITextView，我在其中向框架添加了一些阴影，但是当我写的时候，文本也得到了相同的阴影。如何避免这个问题？
我的代码：
commentary = [[UITextView alloc]initWithFrame:CGRectMake(10, 435, 230, 120)];
commentary.font = STANDARDFONT;
commentary.backgroundColor = BACKGROUND;
commentary.layer.shadowColor = [UIColor blackColor].CGColor;
commentary.layer.shadowOffset = CGSizeMake(2, 2);
commentary.layer.shadowOpacity = 0.8;
commentary.layer.shadowRadius = 2.0;
commentary.layer.borderColor = [UIColor grayColor].CGColor;
commentary.layer.borderWidth = 1.5;
commentary.layer.cornerRadius = 5;
commentary.layer.masksToBounds = NO;
commentary.clipsToBounds = NO;
[self addSubview:commentary];
背景和标准是[UICOLOR clearColor].CGColor和[UIFont fontWithName:@"TimesNewRomanPSMT" size:16];