1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
//
// ICRPlaceholderTextView.m
// Cruiser
//
// Created by Lili Wang on 15/4/7.
// Copyright (c) 2015年 Xummer. All rights reserved.
//
#import "ICRPlaceholderTextView.h"
@interface ICRPlaceholderTextView ()
@property (unsafe_unretained, nonatomic, readonly) NSString* realText;
- (void) beginEditing:(NSNotification*) notification;
- (void) endEditing:(NSNotification*) notification;
@end
@implementation ICRPlaceholderTextView
@synthesize m_placeholderColor;
@synthesize m_placeHolder;
@synthesize m_realTextColor;
- (id)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self initObserver];
}
return self;
}
- (void)awakeFromNib {
[super awakeFromNib];
[self initObserver];
}
- (void)initObserver {
[Notification addObserver:self
selector:@selector(beginEditing:)
name:UITextViewTextDidBeginEditingNotification
object:self];
[Notification addObserver:self
selector:@selector(endEditing:)
name:UITextViewTextDidEndEditingNotification
object:self];
self.m_realTextColor = self.textColor;
self.m_placeholderColor = [UIColor lightGrayColor];
}
#pragma mark -
#pragma mark Setter/Getters
- (NSString *)realText {
return [super text];
}
- (void)setTextColor:(UIColor *)textColor {
if ([self.realText isEqualToString:self.m_placeHolder]) {
if ([textColor isEqual:self.m_placeholderColor]){
[super setTextColor:textColor];
} else {
self.m_realTextColor = textColor;
}
}
else {
self.m_realTextColor = textColor;
[super setTextColor:textColor];
}
}
- (void)setM_placeHolder:(NSString *)am_placeHolder {
if ([self.realText isEqualToString:self.m_placeHolder] && ![self isFirstResponder]) {
self.text = am_placeHolder;
}
if (am_placeHolder != self.m_placeHolder) {
m_placeHolder = am_placeHolder;
}
[self endEditing:nil];
}
- (void)setM_placeholderColor:(UIColor *)am_placeholderColor {
m_placeholderColor = am_placeholderColor;
if ([super.text isEqualToString:self.m_placeHolder]) {
self.textColor = self.m_placeholderColor;
}
}
- (NSString *)text {
NSString* text = [super text];
if ([text isEqualToString:self.m_placeHolder]) return @"";
return text;
}
- (void) setText:(NSString *)text {
if (([text isEqualToString:@""] || text == nil) && ![self isFirstResponder]) {
super.text = self.m_placeHolder;
}
else {
super.text = text;
}
if ([text isEqualToString:self.m_placeHolder] || text == nil) {
self.textColor = self.m_placeholderColor;
}
else {
self.textColor = self.m_realTextColor;
}
}
#pragma mark -
#pragma mark - Observer Actions
- (void) beginEditing:(NSNotification*) notification {
if ([self.realText isEqualToString:self.m_placeHolder]) {
super.text = nil;
self.textColor = self.m_realTextColor;
}
}
- (void) endEditing:(NSNotification*) notification {
if ([self.realText isEqualToString:@""] || self.realText == nil) {
super.text = self.m_placeHolder;
self.textColor = self.m_placeholderColor;
}
}
#pragma mark -
#pragma mark Dealloc
- (void)dealloc {
[Notification removeObserver:self];
}
@end