├── LICENSE ├── MPTextView.h ├── MPTextView.m └── README.md /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. 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We also 175 | recommend that a file or class name and description of purpose be included on 176 | the same "printed page" as the copyright notice for easier identification within 177 | third-party archives. 178 | 179 | Copyright [yyyy] [name of copyright owner] 180 | 181 | Licensed under the Apache License, Version 2.0 (the "License"); 182 | you may not use this file except in compliance with the License. 183 | You may obtain a copy of the License at 184 | 185 | http://www.apache.org/licenses/LICENSE-2.0 186 | 187 | Unless required by applicable law or agreed to in writing, software 188 | distributed under the License is distributed on an "AS IS" BASIS, 189 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 190 | See the License for the specific language governing permissions and 191 | limitations under the License. 192 | -------------------------------------------------------------------------------- /MPTextView.h: -------------------------------------------------------------------------------- 1 | // 2 | // MPTextView.h 3 | // 4 | // Created by Christopher Bowns on 7/25/13. 5 | // Licensed under the Apache v2 license. 6 | // 7 | 8 | #import 9 | 10 | @interface MPTextView : UITextView 11 | 12 | // Named .placeholderText, in case UITextView gains 13 | // a .placeholder property (like UITextField) in future iOS versions. 14 | @property (nonatomic, copy) NSString *placeholderText; 15 | 16 | @end 17 | -------------------------------------------------------------------------------- /MPTextView.m: -------------------------------------------------------------------------------- 1 | // 2 | // MPTextView.m 3 | // 4 | // Created by Christopher Bowns on 7/25/13. 5 | // Licensed under the Apache v2 license. 6 | // 7 | 8 | #import "MPTextView.h" 9 | 10 | // Manually-selected label offsets to align placeholder label with text entry. 11 | static CGFloat const kLabelLeftOffset = 8.f; 12 | static CGFloat const kLabelTopOffset = 0.f; 13 | 14 | // When instantiated from IB, the text view has an 8 point top offset: 15 | static CGFloat const kLabelTopOffsetFromIB = 8.f; 16 | // On retina iPhones and iPads, the label is offset by 0.5 points: 17 | static CGFloat const kLabelTopOffsetRetina = 0.5f; 18 | 19 | @interface MPTextView () 20 | 21 | @property (nonatomic, strong) UILabel *placeholderLabel; 22 | 23 | // The top offset differs when the view is instantiated from IB or programmatically. 24 | // Use this to track the instantiation route and offset the label accordingly. 25 | @property (nonatomic, assign) CGFloat topLabelOffset; 26 | 27 | // Handle text changed event so we can update the placeholder appropriately 28 | - (void)textChanged:(NSNotification *)note; 29 | 30 | @end 31 | 32 | 33 | @implementation MPTextView 34 | 35 | #pragma mark - Initializers 36 | 37 | - (id)initWithCoder:(NSCoder *)aDecoder { 38 | self = [super initWithCoder:aDecoder]; 39 | if (self) { 40 | // Account for IB offset: 41 | _topLabelOffset = kLabelTopOffsetFromIB; 42 | [self finishInitialization]; 43 | } 44 | return self; 45 | } 46 | 47 | - (id)initWithFrame:(CGRect)frame { 48 | self = [super initWithFrame:frame]; 49 | if (self) { 50 | _topLabelOffset = kLabelTopOffset; 51 | [self finishInitialization]; 52 | } 53 | return self; 54 | } 55 | 56 | // Private method for finishing initialization. 57 | // Since this class isn't documented for subclassing, 58 | // I don't feel comfortable changing the initializer chain. 59 | // Let's do it this way rather than overriding UIView's designated initializer. 60 | - (void)finishInitialization { 61 | // Sign up for notifications for text changes: 62 | [[NSNotificationCenter defaultCenter] addObserver:self 63 | selector:@selector(textChanged:) 64 | name:UITextViewTextDidChangeNotification 65 | object:self]; 66 | 67 | CGFloat labelLeftOffset = kLabelLeftOffset; 68 | // Use our calculated label offset from initWith…: 69 | CGFloat labelTopOffset = self.topLabelOffset; 70 | 71 | // On retina iPhones and iPads, the label is offset by 0.5 points. 72 | if ([[UIScreen mainScreen] scale] == 2.0) { 73 | labelTopOffset += kLabelTopOffsetRetina; 74 | } 75 | 76 | CGSize labelOffset = CGSizeMake(labelLeftOffset, labelTopOffset); 77 | CGRect labelFrame = [self placeholderLabelFrameWithOffset:labelOffset]; 78 | [self createPlaceholderLabel:labelFrame]; 79 | } 80 | 81 | 82 | #pragma mark - Placeholder label helpers 83 | 84 | // Create our label: 85 | - (void)createPlaceholderLabel:(CGRect)labelFrame { 86 | self.placeholderLabel = [[UILabel alloc] initWithFrame:labelFrame]; 87 | self.placeholderLabel.lineBreakMode = NSLineBreakByWordWrapping; 88 | self.placeholderLabel.numberOfLines = 0; 89 | self.placeholderLabel.font = self.font; 90 | self.placeholderLabel.backgroundColor = [UIColor clearColor]; 91 | self.placeholderLabel.text = self.placeholderText; 92 | // Color-matched to UITextField's placeholder text color: 93 | self.placeholderLabel.textColor = [UIColor colorWithWhite:0.71f alpha:1.0f]; 94 | 95 | // UIKit effects on the UITextView, like selection ranges 96 | // and the cursor, are done in a view above the text view, 97 | // so no need to order this below anything else. 98 | // Add the label as a subview. 99 | [self addSubview:self.placeholderLabel]; 100 | } 101 | 102 | - (CGRect)placeholderLabelFrameWithOffset:(CGSize)labelOffset { 103 | return CGRectMake(labelOffset.width, 104 | labelOffset.height, 105 | self.bounds.size.width - (2 * labelOffset.width), 106 | self.bounds.size.height - (2 * labelOffset.height)); 107 | } 108 | 109 | 110 | #pragma mark - Custom accessors 111 | 112 | - (void)setPlaceholderText:(NSString *)string { 113 | _placeholderText = [string copy]; 114 | self.placeholderLabel.text = string; 115 | [self.placeholderLabel sizeToFit]; 116 | } 117 | 118 | 119 | #pragma mark - UITextView subclass methods 120 | 121 | // Keep the placeholder label font in sync with the view's text font. 122 | - (void)setFont:(UIFont *)font { 123 | // Call super. 124 | [super setFont:font]; 125 | 126 | self.placeholderLabel.font = self.font; 127 | } 128 | 129 | // Keep placeholder label alignment in sync with the view's text alignment. 130 | - (void)setTextAlignment:(NSTextAlignment)textAlignment { 131 | // Call super. 132 | [super setTextAlignment:textAlignment]; 133 | 134 | self.placeholderLabel.textAlignment = textAlignment; 135 | } 136 | 137 | // Todo: override setAttributedText to capture changes 138 | // in text alignment? 139 | 140 | 141 | #pragma mark - UITextInput overrides 142 | 143 | // Listen to dictation events to hide the placeholder as is appropriate. 144 | 145 | // Hide when there's a dictation result placeholder 146 | - (id)insertDictationResultPlaceholder { 147 | // Call super. 148 | id placeholder = [super insertDictationResultPlaceholder]; 149 | 150 | // Use -[setHidden] here instead of setAlpha: 151 | // these events also trigger -[textChanged], 152 | // which has a different criteria by which it shows the label, 153 | // but we undeniably know we want this placeholder hidden. 154 | self.placeholderLabel.hidden = YES; 155 | return placeholder; 156 | } 157 | 158 | // Update visibility when dictation ends. 159 | - (void)removeDictationResultPlaceholder:(id)placeholder willInsertResult:(BOOL)willInsertResult { 160 | // Call super. 161 | [super removeDictationResultPlaceholder:placeholder willInsertResult:willInsertResult]; 162 | 163 | // Unset the hidden flag from insertDictationResultPlaceholder. 164 | self.placeholderLabel.hidden = NO; 165 | 166 | // Update our text label based on the entered text. 167 | [self updatePlaceholderLabelVisibility]; 168 | } 169 | 170 | 171 | #pragma mark - Text change listeners 172 | 173 | - (void)updatePlaceholderLabelVisibility { 174 | if ([self.text length] == 0) { 175 | self.placeholderLabel.alpha = 1.f; 176 | } else { 177 | self.placeholderLabel.alpha = 0.f; 178 | } 179 | } 180 | 181 | // When text is set or changed, update the label's visibility. 182 | 183 | - (void)setText:(NSString *)text { 184 | // Call super. 185 | [super setText:text]; 186 | 187 | [self updatePlaceholderLabelVisibility]; 188 | } 189 | 190 | - (void)textChanged:(NSNotification *)notification { 191 | [self updatePlaceholderLabelVisibility]; 192 | } 193 | 194 | @end 195 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | MPTextView 2 | ========== 3 | 4 | ## MPTextView and support for iOS 7 5 | 6 | I'm not currently shipping any applications which use MPTextView. It's completely untested on iOS 7 and later. I recommend maintaining a fork with iOS 7+ support, or evaluating an alternative project such as [SZTextView](https://github.com/glaszig/SZTextView). 7 | 8 | 9 | --- 10 | 11 | 12 | A UITextView subclass with support for placeholder text (similar to UITextField) 13 | 14 | ### Notes and errata 15 | 16 | - The property is named `.placeholderText` to avoid colliding with `.placeholder` if UITextView gains that property in a future version of iOS. 17 | - Some setters on UITextView are overridden to pass font and text alignment data through to the placeholder label. `setAttributedText:` has *not* been. 18 | 19 | This has been tested on an iPhone 5 running iOS 6.1.4, and in the iOS 6.1 Simulator for both non-Retina and Retina iPads. 20 | 21 | Open an issue if you have any problems! 22 | --------------------------------------------------------------------------------