mirror of
https://github.com/HackPlan/IQKeyboardManager.git
synced 2026-03-28 23:59:02 +08:00
130 lines
3.4 KiB
Objective-C
130 lines
3.4 KiB
Objective-C
//
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// IQTextView.m
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// https://github.com/hackiftekhar/IQKeyboardManager
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// Copyright (c) 2013-15 Iftekhar Qurashi.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#import "IQTextView.h"
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#import <UIKit/UILabel.h>
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#import <UIKit/UINibLoading.h>
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#if !(__has_feature(objc_instancetype))
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#define instancetype id
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#endif
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//Xcode 4.5 compatibility check
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#ifndef NSFoundationVersionNumber_iOS_5_1
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#define NSLineBreakByWordWrapping UILineBreakModeWordWrap
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#endif
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@interface IQTextView ()
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-(void)refreshPlaceholder;
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@end
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@implementation IQTextView
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{
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UILabel *placeHolderLabel;
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}
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@synthesize placeholder = _placeholder;
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-(void)initialize
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{
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[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(refreshPlaceholder) name:UITextViewTextDidChangeNotification object:self];
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}
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-(void)dealloc
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{
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[[NSNotificationCenter defaultCenter] removeObserver:self];
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}
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- (instancetype)init
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{
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self = [super init];
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if (self) {
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[self initialize];
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}
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return self;
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}
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-(void)awakeFromNib
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{
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[super awakeFromNib];
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[self initialize];
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}
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-(void)refreshPlaceholder
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{
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if([[self text] length])
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{
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[placeHolderLabel setAlpha:0];
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}
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else
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{
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[placeHolderLabel setAlpha:1];
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}
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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-(void)setFont:(UIFont *)font
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{
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[super setFont:font];
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placeHolderLabel.font = self.font;
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[self setNeedsLayout];
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[self layoutIfNeeded];
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}
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-(void)layoutSubviews
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{
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[super layoutSubviews];
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[placeHolderLabel sizeToFit];
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placeHolderLabel.frame = CGRectMake(8, 8, CGRectGetWidth(self.frame)-16, CGRectGetHeight(placeHolderLabel.frame));
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}
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-(void)setPlaceholder:(NSString *)placeholder
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{
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_placeholder = placeholder;
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if ( placeHolderLabel == nil )
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{
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placeHolderLabel = [[UILabel alloc] init];
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placeHolderLabel.autoresizingMask = (UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight);
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placeHolderLabel.lineBreakMode = NSLineBreakByWordWrapping;
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placeHolderLabel.numberOfLines = 0;
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placeHolderLabel.font = self.font;
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placeHolderLabel.backgroundColor = [UIColor clearColor];
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placeHolderLabel.textColor = [UIColor colorWithWhite:0.7 alpha:1.0];
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placeHolderLabel.alpha = 0;
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[self addSubview:placeHolderLabel];
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}
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placeHolderLabel.text = self.placeholder;
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[self refreshPlaceholder];
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}
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@end
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