UITextField 控件和代理协议方法
UITextField *tf = [[UITextField alloc]init];
tf.frame = CGRectMake(40, 150, 250, 40);
tf.backgroundColor = [UIColor lightGrayColor];
//*****************2.方法属性:***********************
//设置边框样式
// UITextBorderStyleNone, --无
// UITextBorderStyleLine, --线框
// UITextBorderStyleBezel, --阴影
// UITextBorderStyleRoundedRect --圆角
tf.borderStyle = UITextBorderStyleRoundedRect;
//设置密文输入
tf.secureTextEntry = YES;
//设置提示(占位符)
tf.placeholder = @"请输入密码";
//设置清除按钮模式
// UITextFieldViewModeNever, --从不显示
// UITextFieldViewModeWhileEditing, --正在编辑的时候显示
// UITextFieldViewModeUnlessEditing, --非编辑时候显示
// UITextFieldViewModeAlways --总是显示
tf.clearButtonMode = UITextFieldViewModeUnlessEditing;
//设置字体
tf.font = [UIFont systemFontOfSize:26];
//显示文字颜色
tf.textColor = [UIColor redColor];
//设置键盘显示样式
// UIKeyboardTypeDefault, // Default type for the current input method.
// UIKeyboardTypeASCIICapable, // Displays a keyboard which can enter ASCII characters, non-ASCII keyboards remain active
// UIKeyboardTypeNumbersAndPunctuation, // Numbers and assorted punctuation.
// UIKeyboardTypeURL, // A type optimized for URL entry (shows . / .com prominently).
// UIKeyboardTypeNumberPad, // A number pad (0-9). Suitable for PIN entry.
// UIKeyboardTypePhonePad, // A phone pad (1-9, *, 0, #, with letters under the numbers).
// UIKeyboardTypeNamePhonePad, // A type optimized for entering a person's name or phone number.
// UIKeyboardTypeEmailAddress, // A type optimized for multiple email address entry (shows space @ . prominently).
// UIKeyboardTypeDecimalPad NS_ENUM_AVAILABLE_IOS(4_1), // A number pad with a decimal point.
// UIKeyboardTypeTwitter NS_ENUM_AVAILABLE_IOS(5_0), // A type optimized for twitter text entry (easy access to @ #)
// UIKeyboardTypeWebSearch NS_ENUM_AVAILABLE_IOS(7_0), // A default keyboard type with URL-oriented addition (shows space . prominently).
tf.keyboardType = UIKeyboardTypePhonePad;
//设置键盘的外观
// UIKeyboardAppearanceDefault, // Default apperance for the current input method.
// UIKeyboardAppearanceDark NS_ENUM_AVAILABLE_IOS(7_0),
// UIKeyboardAppearanceLight NS_ENUM_AVAILABLE_IOS(7_0),
tf.keyboardAppearance = UIKeyboardAppearanceDark;
//设置自动调整字体大小来适应宽度(但是有最小极限,过了还是会往后移)
tf2.adjustsFontSizeToFitWidth = YES;
//调整能显示的最小字体
tf2.minimumFontSize = 20;
//设置或者获取文本框的内容
tf2.text= @"我是文本输入框";
NSString *text = tf2.text;
//设置文本对齐方式
tf2.textAlignment = NSTextAlignmentCenter;
//设置是否在开始编辑时清空内容
tf2.clearsOnBeginEditing = YES;
//判断当前是否在编辑状态
//tf2.isEditing;
//设置文本输入框的左视图
UIView *view = [[UIView alloc]init];
//设置左视图的时候X,Y坐标无效,高度在tf2文本输入框的范围内有效
view.frame = CGRectMake(100, 100, 100, 100);
view.backgroundColor = [UIColor purpleColor];
tf2.leftView = view;
//想要显示左视图必须设置视图的显示模式
tf2.leftViewMode = UITextFieldViewModeAlways;
//设置文本输入框的右视图
UIView *view1 = [[UIView alloc]init];
//设置左视图的时候X,Y坐标无效,高度在tf2文本输入框的范围内有效
view1.frame = CGRectMake(100, 100, 20, 20);
view1.backgroundColor = [UIColor orangeColor];
tf2.rightView = view1;
//想要显示左视图必须设置视图的显示模式
tf2.rightViewMode = UITextFieldViewModeAlways;
//设置文本输入框的右视图
UIView *inputView = [[UIView alloc]init];
//设置左视图的时候X,Y坐标无效,高度在tf2文本输入框的范围内有效
inputView.frame = CGRectMake(100, 100, 100, 100);
inputView.backgroundColor = [UIColor orangeColor];
//设置响应键盘的来源(自定义软键盘)
//tf2.inputView = inputView;
//添加附属视图(在软键盘上面多显示一层内容)（二级视图）
UIView *inputView2 = [[UIView alloc]init];
inputView2.frame = CGRectMake(100, 100, 100, 100);
inputView2.backgroundColor = [UIColor brownColor]；
tf2.inputAccessoryView = inputView2;
//设置返回按钮的类型
tf2.returnKeyType = UIReturnKeyGo;
//***********************************3. 为这个文本框控件设置代理***********************************
//这个控制器必须遵守协议 .h:
tf.delegate = self;
//***********************************4. 调用代理的方法实现对应功能***********************************
#pragma mark - UITextFieldDelegate方法
/**
* 这个方法返回是否可以开始编辑,当用户点击textfield的时候调用这个方法
*
* @param textField 当前被点击的文本输入框对象
*
* @return YES代表可以编辑,NO则不能编辑
*/
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
NSLog(@"%@",NSStringFromSelector(_cmd));
return YES;
}
/**
* 这个方法在开始编辑时调用(进入编辑状态时执行)
*
* @param textField 当前被点击的文本输入框对象
*/
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog(@"%@",NSStringFromSelector(_cmd));
if (textField.tag == 102) {
NSLog(@"tf2");
}
}
/**
* 询问是否可以结束编辑状态(textField想要结束编辑状态时调用)
*
* @param textField 当前被点击的文本输入框对象
*
* @return YES:可以结束 NO:不能结束
*/
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
return YES;
}
/**
* 已经结束编辑状态调用该方法
*
* @param textField 当前编辑文本框对象
*/
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"已经结束");
}
//*****************************键盘收回方法********************************
//监听键盘弹出的通知
//当软键盘弹出前,系统会自动发送通知信息
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillShow:) name: UIKeyboardWillShowNotification object:nil];
//监听键盘收回的通知
//当软键盘收回前,系统会自动发送通知信息
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillHide:) name: UIKeyboardWillHideNotification object:nil];
/**
* 处理键盘收回前通知事件
*
* @param not <#not description#>
*/
- (void)keyboardWillHide:(NSNotification *)not
{
//1.取到两个按钮
for (int i=0; i<2; i++) {
UIButton *btn = (UIButton *)[self.view viewWithTag:1000+i];
CGRect rect = btn.frame;
rect.origin.y += 100;
//调用动画效果
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8) {
}else{
[UIView animateWithDuration:1 animations:^{
btn.frame = rect;
}];
}
}
}
/**
* 处理键盘弹出前通知事件
*
* @param not 接收返回的通知参数
*/
- (void)keyboardWillShow:(NSNotification *)not
{
//1.取到两个按钮
for (int i=0; i<2; i++) {
UIButton *btn = (UIButton *)[self.view viewWithTag:1000+i];
CGRect rect = btn.frame;
rect.origin.y -= 100;
//调用动画效果
if ([[[UIDevice currentDevice] systemVersion] floatValue] < 8) {
}else{
[UIView animateWithDuration:1 animations:^{
btn.frame = rect;
}];
}
}
}
//创建提示标签
- (void)createLabels
{
NSArray *array = @[@"Q Q :",@"密码 :"];
for (int i=0; i UILabel *label = [[UILabel alloc]init]; label.frame = CGRectMake(40, 100 + i*150, 80, 40); label.text = array[i]; [self.view addSubview:label]; } } //创建 - (void)createField1 { UITextField *tf1 = [[UITextField alloc]init]; tf1.frame = CGRectMake(130, 100, 200, 40); tf1.borderStyle = UITextBorderStyleRoundedRect; tf1.keyboardType = UIKeyboardTypeNumberPad; tf1.font = [UIFont systemFontOfSize:26]; tf1.placeholder = @"请输入账号"; tf1.delegate = self; tf1.tag = 101; tf1.clearButtonMode = UITextFieldViewModeAlways; [self.view addSubview:tf1]; } //创建 - (void)createField2 { UITextField *tf2 = [[UITextField alloc]init]; tf2.frame = CGRectMake(130, 250, 200, 40); tf2.borderStyle = UITextBorderStyleRoundedRect; //tf2.keyboardType = UIKeyboardTypeNumberPad; tf2.font = [UIFont systemFontOfSize:26]; tf2.placeholder = @"请输入密码"; tf2.secureTextEntry = YES; tf2.delegate = self; tf2.tag = 102; tf2.returnKeyType = UIReturnKeyGo; tf2.clearButtonMode = UITextFieldViewModeAlways; [self.view addSubview:tf2]; } - (void)createBtn { NSArray *arr = @[@"登 录",@"注 册"]; for (int i=0; i UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; btn.frame = CGRectMake(80 + i*100, 500, 100, 40); [btn setTitle:arr[i] forState:UIControlStateNormal]; btn.titleLabel.font = [UIFont systemFontOfSize:26]; btn.tag = 1000 + i; [btn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal]; [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:btn]; } } - (void)btnClick:(UIButton *)btn { } /** * 收回软键盘方法4: * 从UIControl继承可以创建自定义的视图 */ - (void)createController { UIControl *ctrl = [[UIControl alloc]init]; ctrl.frame = [[UIScreen mainScreen]bounds]; [ctrl addTarget:self action:@selector(ctrlClicked) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:ctrl]; [self.view sendSubviewToBack:ctrl]; } /** * ctrl点击事件,去除所有空间第一响应者 */ - (void)ctrlClicked { [self.view endEditing:YES]; } #pragma mark - 触摸相关方法 /** * 收回软键盘的方式2 * * @param touches <#touches description#> * @param event <#event description#> */ - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //让所有的文本输入框成为第一响应者 // for (int i=0; i<2; i++) { // UITextField *tf = (UITextField *)[self.view viewWithTag:101+i]; // [tf resignFirstResponder]; // } //方法3:让VIEW上所有的子视图结束编辑(取消成为第一响应者) [self.view endEditing:YES]; } #pragma mark - UITextFieldDelegate方法 /** * 当用户点击清楚按钮时调用 * * @param textField <#textField description#> * * @return YES:可以清除 NO:不能清除 */ - (BOOL)textFieldShouldClear:(UITextField *)textField { if (textField.tag == 101) { //清除按钮内容 //textField.text = @""; return NO; }else{ return YES; } } /** * 设置返回键是否可以返回(常在这里设置收回软键盘),当用户点击返回按钮时被调用 * * @param textField 当前被点击的文本输入框对象 * * @return YES:可以返回了 NO:不可以返回 */ - (BOOL)textFieldShouldReturn:(UITextField *)textField { //收回软键盘的方式1:textField会自动退出编辑模式,并且收回软键盘 [textField resignFirstResponder]; return YES; } /** * 这个方法在用户点击软键盘,textField将用哦过户输入数据放入textField之前调用 * (可以在这里处理用户输入的信息做出判断) * @param textField 当前被点击的文本输入框对象 * @param range 需要替换的字符串范围 * @param string 用户输入的字符 * * @return YES:用户输入内容添加到textField中,NO:不添加 */ - (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { if ([string isEqualToString:@"0"]) { return NO; } NSLog(@"rang = %@,string = %@",NSStringFromRange(range),string); return YES; }
/**
* 这个方法返回是否可以开始编辑,当用户点击textfield的时候调用这个方法
*
* @param textField 当前被点击的文本输入框对象
*
* @return YES代表可以编辑,并且系统让这个textField成为第一响应者,进入编辑状态,并且弹出软键盘;NO则不能编辑
*/
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
return YES;
}
/**
* 这个方法在开始编辑时调用(进入编辑状态时执行)
*
* @param textField 当前被点击的文本输入框对象
*/
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog(@"%@",NSStringFromSelector(_cmd));
if (textField.tag == 102) {
NSLog(@"tf2");
}
}
/**
* 询问是否可以结束编辑状态(textField想要结束编辑状态时调用)
*
* @param textField 当前被点击的文本输入框对象
*
* @return YES:可以结束 NO:不能结束
*/
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
return YES;
}
/**
* 已经结束编辑状态调用该方法
*
* @param textField 当前编辑文本框对象
*/
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"已经结束");
}