iOS-Placeholder in TextView

 Create a new file to Extend UITextView class

 //Copy this code in h file
 //h file
#import <UIKit/UIKit.h>
@interface PlaceholderTextView : UITextView
{
    UILabel *_placeholderLabel;
}


@property (strong, nonatomic) NSString *placeholderText;
@property (strong, nonatomic) UIColor *placeholderColor;


@end

 //Copy this code in m file
//m file
#import "PlaceholderTextView.h"


@implementation PlaceholderTextView


#pragma mark - init & dealloc


- (id)initWithCoder:(NSCoder *)aDecoder
{
    self = [super initWithCoder:aDecoder];
    if (self)
    {
        [self initialize];
    }
   
    return self;
}


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self)
    {
        [self initialize];
    }
   
    return self;
}


- (id)init
{
    self = [super init];
    if (self)
    {
        [self initialize];
    }
   
    return self;
}


- (void)initialize
{
    _placeholderColor = [UIColor lightGrayColor];
    [self layoutGUI];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textChanged:) name:UITextViewTextDidChangeNotification object:self];
}


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


#pragma mark - Notification center


- (void)textChanged:(NSNotification *)notification
{
    if (notification.object == self)
        [self layoutGUI];
}


#pragma mark - layoutGUI


- (void)layoutGUI
{
    _placeholderLabel.alpha = [self.text length] > 0 || [_placeholderText length] == 0 ? 0 : 1;
}


#pragma mark - Setters


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


- (void)setPlaceholderText:(NSString*)placeholderText
{
    _placeholderText = placeholderText;
    [self setNeedsDisplay];
}


- (void)setPlaceholderColor:(UIColor*)color
{
    _placeholderColor = color;
    [self setNeedsDisplay];
}


#pragma mark - drawRect


- (void)drawRect:(CGRect)rect
{
    if ([_placeholderText length] > 0)
    {
        if (!_placeholderLabel)
        {
            _placeholderLabel = [[UILabel alloc] initWithFrame:CGRectMake(8, 8, self.bounds.size.width - 16, 0)];
            _placeholderLabel.lineBreakMode = NSLineBreakByWordWrapping;
            _placeholderLabel.numberOfLines = 0;
            _placeholderLabel.font = self.font;
            _placeholderLabel.backgroundColor = [UIColor clearColor];
            _placeholderLabel.alpha = 0;
            [self addSubview:_placeholderLabel];
        }
       
        _placeholderLabel.text = _placeholderText;
        _placeholderLabel.textColor = _placeholderColor;
        [_placeholderLabel sizeToFit];
        [self sendSubviewToBack:_placeholderLabel];
    }
   
    [self layoutGUI];
   
    [super drawRect:rect];
}

// How to use
 Select TextView then go to inspector Panel as you can see in the following  Image and Enter Custom TextView Class Name 
"PlaceholderTextView"

Next Step is to set Outlet for the textView in drag-n drop way.

Import Class  
#import "PlaceholderTextView.h"

@interface Create ()
@property (strong, nonatomic) IBOutlet PlaceholderTextView *notes;

@end
- (void)viewDidLoad {
    [super viewDidLoad];
    self.notes.placeholderText=@"Notes";
    self.notes.layer.borderWidth=1;
    self.notes.layer.borderColor=[[UIColor blackColor]CGColor];
    // Do any additional setup after loading the view from its nib.
}