Custom UITextView with a placeholder label.

MyTextView.m

//
//  MyTextView.m
//  TextViewDemo
//
//  Created by Jayaprada on 10/11/12.
//  Copyright (c) 2012 mountain lion. All rights reserved.
//

#import "MyTextView.h"

@interface MyTextView () {
    UILabel *placeHolderLabel;
}

@property(nonatomic, strong) NSString *placeHolder;

@end

@implementation MyTextView

@synthesize placeHolder;

- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        [self customInit];
    }
    return self;
}

- (void) customInit {
    placeHolderLabel = [[UILabel alloc] initWithFrame:CGRectZero];
    placeHolderLabel.font = self.font;
    placeHolderLabel.frame = CGRectMake(10, 7, self.bounds.size.width-10, 22.f);
//    placeHolderLabel.frame = self.inputView.frame;
//    placeHolderLabel.autoresizingMask = self.inputView.autoresizingMask;
    placeHolderLabel.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;
    placeHolderLabel.textColor = [UIColor lightGrayColor];
    
    placeHolderLabel.backgroundColor = [UIColor clearColor];
    [self addSubview:placeHolderLabel];
    
    [self sendSubviewToBack:placeHolderLabel];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textChanged:) name:UITextViewTextDidChangeNotification object:self];
  
}

- (void) textChanged:(id) sender {
    placeHolderLabel.hidden = self.text.length > 0;
}

- (id) initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    if (self) {
        [self customInit];
    }
    return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
    // Drawing code
}
*/

- (void) setText:(NSString *)text {
    [super setText:text];
}

- (void) setPlaceHolder:(NSString *)placeHolder1 {
    placeHolder = placeHolder1;
    placeHolderLabel.text = placeHolder;
}

- (void) dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}
@end