1 //
2 // ViewController.m
3 // UITextField代理
4 //
5 // Created by 大欢 on 16/1/22.
6 // Copyright © 2016年 bjsxt. All rights reserved.
7 //
8
9 #import "ViewController.h"
10
11 @interface ViewController ()<UITextFieldDelegate>
12
13 @property (nonatomic, strong) UITextField * userTF;
14
15 @property (nonatomic, strong) UITextField * pwdTF;
16
17 @end
18
19 @implementation ViewController
20
21 - (void)viewDidLoad {
22 [super viewDidLoad];
23
24 UITextField * userTextField = [[UITextField alloc] initWithFrame:CGRectMake(20, 50, CGRectGetWidth(self.view.frame) - 40, 50)];
25 userTextField.placeholder = @"请输入用户名";
26 userTextField.borderStyle = UITextBorderStyleRoundedRect;
27 userTextField.delegate = self;
28 userTextField.clearButtonMode = UITextFieldViewModeAlways;
29 userTextField.returnKeyType = UIReturnKeyNext;
30 [self.view addSubview:userTextField];
31 self.userTF = userTextField;
32
33 UITextField * pwdTextField = [[UITextField alloc] initWithFrame:CGRectMake(20, CGRectGetMaxY(userTextField.frame) + 20, CGRectGetWidth(self.view.frame) - 40, 50)];
34 pwdTextField.placeholder = @"请输入密码";
35 pwdTextField.borderStyle = UITextBorderStyleRoundedRect;
36 pwdTextField.delegate = self;
37 pwdTextField.returnKeyType = UIReturnKeyGo;
38 [self.view addSubview:pwdTextField];
39 self.pwdTF = pwdTextField;
40
41 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textDidBeginEditingNotification:) name:UITextFieldTextDidBeginEditingNotification object:nil];
42 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textDidEndEditingNotification:) name:UITextFieldTextDidEndEditingNotification object:nil];
43 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textDidChangeNotification:) name:UITextFieldTextDidChangeNotification object:nil];
44
45 }
46
47 - (void)textDidBeginEditingNotification:(NSNotification *)notifi {
48 NSLog(@"开始");
49 }
50
51 - (void)textDidEndEditingNotification:(NSNotification *)notifi {
52 NSLog(@"结束");
53 }
54
55 - (void)textDidChangeNotification:(NSNotification *)notifi {
56
57 UITextField * tf = notifi.object;
58 NSLog(@"%@",tf.text);
59 }
60
61 //是否可以开始编辑
62
63 - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
64
65 return YES;
66 }
67
68 //是否可以结束编辑
69
70 //- (BOOL)textFieldShouldEndEditing:(UITextField *)textField {
71 //
72 // return YES;
73 //}
74 //
75 //- (void)textFieldDidBeginEditing:(UITextField *)textField {
76 //
77 // NSLog(@"已经开始");
78 //}
79 //
80 //- (void)textFieldDidEndEditing:(UITextField *)textField {
81 //
82 // NSLog(@"已经结束");
83 //}
84 //
85 //- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
86 //
87 // if (range.location > 2) return NO;
88 //
89 // NSLog(@"%@",NSStringFromRange(range));
90 //
91 // NSLog(@"%@",string);
92 //
93 //
94 // return YES;
95 //}
96
97 //clearbutton 如果是NO不好使
98
99 //- (BOOL)textFieldShouldClear:(UITextField *)textField {
100 //
101 // return NO;
102 //}
103
104
105 - (BOOL)textFieldShouldReturn:(UITextField *)textField {
106
107 if (self.userTF == textField) {
108 [self.pwdTF becomeFirstResponder];
109 } else if (self.pwdTF == textField) {
110 [self.pwdTF resignFirstResponder];
111 }
112
113 return YES;
114 }
115
116
117
118 - (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
119
120 [self.userTF resignFirstResponder];
121
122 [self.pwdTF resignFirstResponder];
123
124 }
125
126
127 @end
