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- //
- // 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] || [[self attributedText] length])
- {
- [_placeholderLabel setAlpha:0];
- }
- else
- {
- [_placeholderLabel setAlpha:1];
- }
-
- [self setNeedsLayout];
- [self layoutIfNeeded];
- }
- - (void)setText:(NSString *)text
- {
- [super setText:text];
- [self refreshPlaceholder];
- }
- -(void)setAttributedText:(NSAttributedString *)attributedText
- {
- [super setAttributedText:attributedText];
- [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];
- self.placeholderLabel.frame = [self placeholderExpectedFrame];
- }
- -(void)setPlaceholder:(NSString *)placeholder
- {
- _placeholder = placeholder;
-
- self.placeholderLabel.text = placeholder;
- [self refreshPlaceholder];
- }
- -(void)setAttributedPlaceholder:(NSAttributedString *)attributedPlaceholder
- {
- _attributedPlaceholder = attributedPlaceholder;
-
- self.placeholderLabel.attributedText = attributedPlaceholder;
- [self refreshPlaceholder];
- }
- -(void)setPlaceholderTextColor:(UIColor*)placeholderTextColor
- {
- _placeholderTextColor = placeholderTextColor;
- self.placeholderLabel.textColor = placeholderTextColor;
- }
- -(UIEdgeInsets)placeholderInsets
- {
- return UIEdgeInsetsMake(self.textContainerInset.top, self.textContainerInset.left + self.textContainer.lineFragmentPadding, self.textContainerInset.bottom, self.textContainerInset.right + self.textContainer.lineFragmentPadding);
- }
- -(CGRect)placeholderExpectedFrame
- {
- UIEdgeInsets placeholderInsets = [self placeholderInsets];
- CGFloat maxWidth = CGRectGetWidth(self.frame)-placeholderInsets.left-placeholderInsets.right;
-
- CGSize expectedSize = [self.placeholderLabel sizeThatFits:CGSizeMake(maxWidth, CGRectGetHeight(self.frame)-placeholderInsets.top-placeholderInsets.bottom)];
-
- return CGRectMake(placeholderInsets.left, placeholderInsets.top, maxWidth, expectedSize.height);
- }
- -(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];
- }
- -(CGSize)intrinsicContentSize
- {
- if (self.hasText) {
- return [super intrinsicContentSize];
- }
-
- UIEdgeInsets placeholderInsets = [self placeholderInsets];
- CGSize newSize = [super intrinsicContentSize];
-
- newSize.height = [self placeholderExpectedFrame].size.height + placeholderInsets.top + placeholderInsets.bottom;
-
- return newSize;
- }
- @end
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