修改UITextView 样式

一、给UITextView绘制圆角，通过QuartzCore框架，操作CALayer可以给UITextView绘制圆角边框。

需要添加#import 头文件

theTextView.layer.borderColor = [UIColor blueColor].CGColor;

theTextView.layer.borderWidth =1.0;//该属性显示外边框

theTextView.layer.cornerRadius = 6.0;//通过该值来设置textView边角的弧度

theTextView.layer.masksToBounds = YES

//通过cornerRadius可设置圆角弧度。

二、UITextView和UIImageView组合，将背景图片制作好加载进UIImageView。

CGRect imageViewFrame = CGRectMake(30.0,100.0,240.0,90.0);

UIImageView *imageView = [[UIImageView alloc] initWithFrame:imageViewFrame];

imageView.image = [UIImage imageNamed:@"background.png"];

imageView.userInteractionEnabled = YES;

CGRect textViewFrame = CGRectMake(5.0,5.0,230.0,80.0);

UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame];

textView.backgroundColor = [UIColor clearColor];

[imageView addSubview:textView];

//设置imageView.userInteractionEnabled = YES,让textView响应触碰事件。

三、设置UITextView背景图片，在UITextView区域内。

CGRect textViewFrame = CGRectMake(30.0,20.0,240.0,90.0);

UITextView *textView = [[UITextView alloc] initWithFrame:textViewFrame];      

UIImageView *imageView = [[UIImageView alloc] initWithFrame:[textView bounds]];

imageView.image = [UIImage imageNamed:@"backgroundImage.png"];

[textView addSubview:imageView];

[textView sendSubviewToBack:imageView];