UITextField的一些属性

来源：互联网发布：java io深入编辑：程序博客网时间：2024/05/19 16:22

1.基本概念

//7.设置水平方向文本对齐方式:默认左对齐

textField0.textAlignment = NSTextAlignmentCenter;

//8.设置竖直方向文本对齐方式:默认是center

[textField0 setContentVerticalAlignment:UIControlContentVerticalAlignmentCenter];

//11.设置自动首字母大写类型

[textField0 setAutocapitalizationType:UITextAutocapitalizationTypeWords];

//12.设置自动纠错类型:默认是开启自动纠错

[textField0 setAutocorrectionType:UITextAutocorrectionTypeNo];

//13.设置键盘风格:数字、网址、电话、Email...

[textField0 setKeyboardType:UIKeyboardTypeDefault];

//14.设置return键的样式

[textField0 setReturnKeyType:UIReturnKeySend];

//15.设置leftView:x,y不起作用

UIImageView *leftIv = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 32, 32)];

leftIv.image = [UIImage imageNamed:@"player1"];

[textField0 setLeftView:leftIv];

//16.设置leftView的显示模式:总是出现

[textField0 setLeftViewMode:UITextFieldViewModeAlways];

[leftIv release];

//19.设置右侧清除按钮的样式:默认从不出现

[textField0 setClearButtonMode:UITextFieldViewModeAlways];

//20.设置再次编辑时，清除上次输入的内容

[textField0 setClearsOnBeginEditing:YES];

//21.设置二级键盘:可以在原键盘的顶部添加一个二级键盘。会影响键盘的高度 --> 键盘默认高度是216

UIView *view0 = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];

view0.backgroundColor = [UIColor greenColor];

[textField0 setInputAccessoryView:view0];

[view0 release];

[self.view addSubview:textField0];

[textField0 release];

UITextField *textField1 = [[UITextField alloc]initWithFrame:CGRectMake(40, 120, 240, 40)];

textField1.backgroundColor = [UIColor yellowColor];

textField1.borderStyle = UITextBorderStyleBezel;

//22.设置一级键盘:键盘本身

UIView *inputView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 216)];

inputView.backgroundColor = [UIColor lightGrayColor];

NSArray *array = @[@"�",@"☺️",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�",@"�"];

for (int i = 0; i < [array count]; i++) {

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];

[btn setTitle:[array objectAtIndex:i] forState:UIControlStateNormal];

btn.frame = CGRectMake(30 + 75*(i%4), 8 + 50*(i/4), 30, 30);

[btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];

[inputView addSubview:btn];

}

//定制键盘不弹系统键盘

//设置 inputView之后就不弹系统键盘了

textField.inputView = inputView;

[textField1 setInputView:inputView];

[inputView release];

textField1.tag = 101;

[self.view addSubview:textField1];

[textField1 release];

2.收键盘的三种方法

#pragma mark - UITextField收起键盘

1.点击空白处收起键盘

1.1.1UITouch

1.2.UIControl

2.点击return键收起键盘

#if 1

//1.通过UITouch点击空白处收起键盘 --> UIView的方法

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

//当textField将要开始编辑时，键盘会成为第一响应者 becomeFirstResponder --> 键盘出现，键盘不会自己收回。

[self hiddenKeyBoard];

}

#else

-(void)createControl{

//(0,0,320,480)

//UIControl:事件驱动型控件，可以添加事件

UIControl *ctl = [[UIControl alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

[ctl addTarget:self action:@selector(controlAction) forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:ctl];

//把ctl放到最下层

[self.view sendSubviewToBack:ctl];

}

-(void)controlAction{

[self hiddenKeyBoard];

}

#endif

//收键盘

-(void)hiddenKeyBoard{

//先获取到textField

UITextField *tmp0 = (UITextField *)[self.view viewWithTag:100];

UITextField *tmp1 = (UITextField *)[self.view viewWithTag:101];

//收键盘 --> resignFirstResponder

[tmp0 resignFirstResponder];

[tmp1 resignFirstResponder];

}

- (void)viewDidLoad

{

[super viewDidLoad];

[self createTextField];

#if 1

#else

[self createControl];

#endif

}

//3.使用textField协议中的方法。通过return键收回键盘

-(BOOL)textFieldShouldReturn:(UITextField *)textField{

//是否允许return:如果设置为NO，那么点击return键时，没有任何操作

[self hiddenKeyBoard];

return YES;

}

3.协议相关

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField{

NSLog(@"即将开始编辑时调用这个方法");

return YES;

}

-(void)textFieldDidBeginEditing:(UITextField *)textField{

NSLog(@"开始编辑时会调用这个方法");

//让按钮位置上移

UIButton *tmp = (UIButton *)[self.view viewWithTag:200];

[UIView animateWithDuration:0.3 animations:^{

tmp.frame = CGRectMake(100, 190, 100, 30);

}];

}

-(BOOL)textFieldShouldEndEditing:(UITextField *)textField{

NSLog(@"即将结束编辑时调用该方法");

return YES;

}

-(void)textFieldDidEndEditing:(UITextField *)textField{

NSLog(@"编辑结束时会调用该方法");

//让按钮下移

UIButton *tmp = (UIButton *)[self.view viewWithTag:200];

[UIView animateWithDuration:0.3 animations:^{

tmp.frame = CGRectMake(100, 300, 100, 30);

}];

}

-(BOOL)textFieldShouldClear:(UITextField *)textField{

//是否允许使用清除按钮:如果返回NO，那么点击清除按钮时，不会有任何操作。

return YES;

}

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

//range:光标的位置。只有位置，没有长度

//string:即将要显示在textfield里面的内容

NSLog(@"range = %@,string = %@",NSStringFromRange(range),string);

//限制密码只能是6位。

NSLog(@"length = %u,stringlength = %u",textField.text.length,string.length);

if (textField.text.length + string.length > 6) {

return NO;

}

return YES;

}

4.通知收键盘

self.view.backgroundColor = [UIColor orangeColor];

//一旦界面被加载就应该立即先注册观察者对象

//首先获取通知中心一个程序只有一个通知中心

NSNotificationCenter *fc = [NSNotificationCenter defaultCenter];

第一个参数:观察者对象的地址

第二个参数:观察者的行为方法

第三个参数:监听的通知的名字

第四个参数:谁发送的通知 nil 表示可以接收任意对象发送的通知

一个监听到通知之后观察者self 就立即执行keyboardWillShow:

//注册观察者;

//监听键盘弹起的通知

[fc addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

//注册一个观察者监听键盘收起的通知

[fc addObserver:self selector:@selector(keyboardWillHidden:) name:UIKeyboardWillHideNotification object:nil];

//观察者一定要在发通知之前注册，一般都是在初始化的时候注册

//监听到键盘弹起的时候观察者要调用的函数

- (void)keyboardWillShow:(NSNotification *)nf {

//获取通知的所有内容放入一个字典中

NSDictionary *dict = [nf userInfo];

NSLog(@"dict:%@",dict);

//获取弹键盘的时间

double t = [[dict objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];

[UIView animateWithDuration:t animations:^{

//需要产生动画的代码写在这里

UIButton *button1 = (UIButton*)[self.view viewWithTag:201];

UIButton *button2 = (UIButton*)[self.view viewWithTag:202];

button1.frame = CGRectMake(60, 200, 100, 50);

button2.frame = CGRectMake(160, 200, 100, 50);

} completion:^(BOOL finished) {

//动画完成之后会执行这个block

NSLog(@"动画完成");

}];

}

//监听到键盘收起的时候观察者要调用的函数

- (void)keyboardWillHidden:(NSNotification *)nf {

//动画

[UIView animateWithDuration:0.25 animations:^{

//需要产生动画的代码写在这里

UIButton *button1 = (UIButton*)[self.view viewWithTag:201];

UIButton *button2 = (UIButton*)[self.view viewWithTag:202];

button1.frame = CGRectMake(60, 250, 100, 50);

button2.frame = CGRectMake(160, 250, 100, 50);

} completion:^(BOOL finished) {

//动画完成之后会执行这个block

NSLog(@"动画完成");

}];

}

//dealloc 的时候要删除观察者

[[NSNotificationCenter defaultCenter] removeObserver:self];

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