//
|
// IQTextView.m
|
// https://github.com/hackiftekhar/IQKeyboardManager
|
// Copyright (c) 2013-16 Iftekhar Qurashi.
|
//
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
// of this software and associated documentation files (the "Software"), to deal
|
// in the Software without restriction, including without limitation the rights
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
// copies of the Software, and to permit persons to whom the Software is
|
// furnished to do so, subject to the following conditions:
|
//
|
// The above copyright notice and this permission notice shall be included in
|
// all copies or substantial portions of the Software.
|
//
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
// THE SOFTWARE.
|
|
#import "IQTextView.h"
|
|
#import <UIKit/NSTextContainer.h>
|
#import <UIKit/UILabel.h>
|
#import <UIKit/UINibLoading.h>
|
|
@interface IQTextView ()
|
|
@property(nonatomic, strong) UILabel *placeholderLabel;
|
|
@end
|
|
@implementation IQTextView
|
|
@synthesize placeholder = _placeholder;
|
@synthesize placeholderLabel = _placeholderLabel;
|
@synthesize placeholderTextColor = _placeholderTextColor;
|
|
-(void)initialize
|
{
|
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshPlaceholder) name:UITextViewTextDidChangeNotification object:self];
|
}
|
|
-(void)dealloc
|
{
|
[_placeholderLabel removeFromSuperview];
|
_placeholderLabel = nil;
|
[[NSNotificationCenter defaultCenter] removeObserver:self];
|
}
|
|
- (instancetype)init
|
{
|
self = [super init];
|
if (self) {
|
[self initialize];
|
}
|
return self;
|
}
|
|
-(void)awakeFromNib
|
{
|
[super awakeFromNib];
|
[self initialize];
|
}
|
|
-(void)refreshPlaceholder
|
{
|
if([[self text] length])
|
{
|
[_placeholderLabel setAlpha:0];
|
}
|
else
|
{
|
[_placeholderLabel setAlpha:1];
|
}
|
|
[self setNeedsLayout];
|
[self layoutIfNeeded];
|
}
|
|
- (void)setText:(NSString *)text
|
{
|
[super setText:text];
|
[self refreshPlaceholder];
|
}
|
|
-(void)setFont:(UIFont *)font
|
{
|
[super setFont:font];
|
self.placeholderLabel.font = self.font;
|
|
[self setNeedsLayout];
|
[self layoutIfNeeded];
|
}
|
|
-(void)setTextAlignment:(NSTextAlignment)textAlignment
|
{
|
[super setTextAlignment:textAlignment];
|
self.placeholderLabel.textAlignment = textAlignment;
|
|
[self setNeedsLayout];
|
[self layoutIfNeeded];
|
}
|
|
-(void)layoutSubviews
|
{
|
[super layoutSubviews];
|
|
CGFloat offsetLeft = self.textContainerInset.left + self.textContainer.lineFragmentPadding;
|
CGFloat offsetRight = self.textContainerInset.right + self.textContainer.lineFragmentPadding;
|
CGFloat offsetTop = self.textContainerInset.top;
|
CGFloat offsetBottom = self.textContainerInset.bottom;
|
|
CGSize expectedSize = [self.placeholderLabel sizeThatFits:CGSizeMake(CGRectGetWidth(self.frame)-offsetLeft-offsetRight, CGRectGetHeight(self.frame)-offsetTop-offsetBottom)];
|
self.placeholderLabel.frame = CGRectMake(offsetLeft, offsetTop, expectedSize.width, expectedSize.height);
|
}
|
|
-(void)setPlaceholder:(NSString *)placeholder
|
{
|
_placeholder = placeholder;
|
|
self.placeholderLabel.text = placeholder;
|
[self refreshPlaceholder];
|
}
|
|
-(void)setPlaceholderTextColor:(UIColor*)placeholderTextColor
|
{
|
_placeholderTextColor = placeholderTextColor;
|
self.placeholderLabel.textColor = placeholderTextColor;
|
}
|
|
-(UILabel*)placeholderLabel
|
{
|
if (_placeholderLabel == nil)
|
{
|
_placeholderLabel = [[UILabel alloc] init];
|
_placeholderLabel.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);
|
_placeholderLabel.lineBreakMode = NSLineBreakByWordWrapping;
|
_placeholderLabel.numberOfLines = 0;
|
_placeholderLabel.font = self.font;
|
_placeholderLabel.textAlignment = self.textAlignment;
|
_placeholderLabel.backgroundColor = [UIColor clearColor];
|
_placeholderLabel.textColor = [UIColor colorWithWhite:0.7 alpha:1.0];
|
_placeholderLabel.alpha = 0;
|
[self addSubview:_placeholderLabel];
|
}
|
|
return _placeholderLabel;
|
}
|
|
//When any text changes on textField, the delegate getter is called. At this time we refresh the textView's placeholder
|
-(id<UITextViewDelegate>)delegate
|
{
|
[self refreshPlaceholder];
|
return [super delegate];
|
}
|
|
@end
|
