//

//  ViewController.m

//  TextView

//

//  Created by YouXianMing on 14/12/18.

//  Copyright (c) 2014年 YouXianMing. All rights reserved.

//

#import "ViewController.h"

static NSString *placeHolderStr = @"User Name";

@interface ViewController ()<UITextViewDelegate>

@property (nonatomic, strong) UITextView  *textView;

@property (nonatomic, strong) UIButton    *button;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // 反应的按钮

    self.button = [[UIButton alloc] initWithFrame:self.view.bounds];

    [self.button addTarget:self

                    action:@selector(buttonEvent)

          forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:self.button];

    // textView

    self.textView = [[UITextView alloc] initWithFrame:CGRectMake(, , , )];

    self.textView.layer.borderWidth = .f;

    self.textView.layer.borderColor = [UIColor grayColor].CGColor;

    self.textView.delegate  = self;

    self.textView.text      = placeHolderStr;

    self.textView.font      = [UIFont systemFontOfSize:.f];

    self.textView.textColor = [UIColor grayColor];

    [self.view addSubview:self.textView];

}

#pragma mark - 代理方法

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView {

    // 设置编辑状态文字颜色

    textView.textColor = [UIColor blackColor];

    // 如果文字为placeHolder文字

    if ([textView.text isEqualToString:placeHolderStr]) {

        textView.text      = @"";

    }

    return YES;

}

- (BOOL)textViewShouldEndEditing:(UITextView *)textView {

    // 如果长度为0，则显示placeHolder文字

    if (textView.text.length == ) {

        textView.text = placeHolderStr;

        textView.textColor = [UIColor grayColor];

    }

    return YES;

}

/**

 *  反应的按钮

 */

- (void)buttonEvent {

    [self.textView resignFirstResponder];

}

@end