textview根据内容自适应

项目截图

还是项目需求，上面两个都是textview，内容多了，textview的高自动变高！！！直接上代码！！！

@interface ViewController ()
{
    
    UITextView *textview1;
    
    UITextView *textview;
    
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    textview = [[UITextView alloc]initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 40)];
    textview.backgroundColor = [UIColor redColor];
    textview.font = [UIFont  systemFontOfSize:20];
    textview.delegate = self;
    [self.view addSubview:textview];
    
    
    textview1 = [[UITextView alloc]initWithFrame:CGRectMake(0, CGRectGetMaxY(textview.frame), self.view.frame.size.width, 40)];
    textview1.backgroundColor = [UIColor cyanColor];
    textview1.font = [UIFont  systemFontOfSize:20];
    textview1.delegate = self;
    [self.view addSubview:textview1];
 
}
-(void)textViewDidChange:(UITextView *)textView{
    CGSize size = [textView sizeThatFits:CGSizeMake(self.view.frame.size.width, MAXFLOAT)];
    if (size.height<=36) {
      
        textView.scrollEnabled = NO;
    }else{
        textView.scrollEnabled = YES;
    }
    textView.frame = CGRectMake(0, 100,self.view.frame.size.width, size.height);
    
    NSLog(@"%f",size.height);
    
//    CGFloat cha =  size.height - 40;
    
    textview1.frame = CGRectMake(0, CGRectGetMaxY(textview.frame),self.view.frame.size.width , 40);
    
    
}