uiTextView简单的用法

　　UITextView和UITextField常见的方法差不多。

如下的一个简单例子：

#import "ViewController.h"

@interface ViewController ()<UITextViewDelegate>

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    UITextView  *textview=[[UITextView alloc]initWithFrame:CGRectMake(20, 20, 200, 200)];
    //textview.backgroundColor=[UIColor grayColor];
    //textview.editable=NO;//是否允许编辑
    //textview.scrollEnabled=YES;//是否允许滚动
   // textview.bounces=NO;//弹簧效果
    textview.layer.borderColor=[UIColor redColor].CGColor;//边框效果
    textview.layer.borderWidth=1;//边框粗细
    textview.layer.cornerRadius=80;//设置圆角
    textview.layer.masksToBounds=YES;
    textview.delegate = self;
    textview.returnKeyType=UIReturnKeyDone;
    [self.view addSubview:textview];

}

-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{
     //检测每次输入的字符
    NSLog(@"%@",text);
    if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];

    }
    return YES;
    }