【代码笔记】iOS-点评内容

一，效果图。

二，工程图。

三，代码。

ViewController.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITextViewDelegate>
{
    //评论内容
    UITextView *commentTextView;
}

@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

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

    //初始化点评内容
    [self addCommentView];

}
#pragma -mark -functions
//初始化点评内容
-(void)addCommentView
{
    //点评内容
    commentTextView=[[UITextView alloc]initWithFrame:CGRectMake(50, 180, 300, 90)];
    commentTextView.text=@"亲，您对商户感觉如何，环境怎样，服务态度如何。(500字符内)";
    commentTextView.font=[UIFont systemFontOfSize:14];
    commentTextView.backgroundColor=[UIColor redColor];
    commentTextView.delegate=self;
    [self.view addSubview:commentTextView];

}
#pragma mark - UITextView Delegate Methods

-(BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
    if ([textView.text isEqualToString:@"亲，您对商户感觉如何，环境怎样，服务态度如何。(500字符内)"]) {
        textView.text=@"";
    }
    return YES;
}
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{

    if ([text isEqualToString:@"\n"]) {
        [textView resignFirstResponder];
        return NO;
    }
    return YES;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}