iOS-监听多个UITextField的输入事件来限制字数 iOS-监听多个UITextField的输入事

textfield输入监听.gif 定制navigationBar

self.navigationBar.tintColor = [GOVCommon colorForKey:@"mainBlueColor"]; self.navigationItem.title = @"实人认证"; [self.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName:[GOVCommon colorForKey:@"enNavigationTitleColor"],NSFontAttributeName : FONT_SIZE_MENUCOLUMNTITLE_EN}]; self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[GOVCommon loadAppImage:@"backButton"]

添加监听

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textFieldEditing:) name:UITextFieldTextDidChangeNotification object:nil];

实现方法,获取当前监听的textField

- (void)textFieldEditing:(NSNotification *)info{ UITextField *textField = (UITextField *)info.object; // 字数限制 if (textField.tag == 10) { if (textField.text.length > 15) { textField.text = [textField.text substringToIndex:15]; } self.fullNameStr = textField.text; }else if (textField.tag == 12){ if (textField.text.length > 6) { textField.text = [textField.text substringToIndex:6]; } self.zipCodeStr = textField.text; }else if (textField.tag == 13){ if (textField.text.length > 11) { textField.text = [textField.text substringToIndex:11]; } self.phoneNumberStr = textField.text; } [self saveButtonChangeColor]; } // 键盘区分 - (void)textFieldDidBeginEditing:(UITextField *)textField{ if (textField.tag == 12 || textField.tag == 13) { textField.keyboardType = UIKeyboardTypePhonePad; }else{ textField.keyboardType = UIKeyboardTypeDefault; } } // 必填项填后提交按钮可点 - (void)saveButtonChangeColor{ // 去除空格 NSCharacterSet *set = [NSCharacterSet whitespaceAndNewlineCharacterSet]; self.fullNameStr = [self.fullNameStr stringByTrimmingCharactersInSet:set]; self.addressStr = [self.addressStr stringByTrimmingCharactersInSet:set]; self.zipCodeStr = [self.zipCodeStr stringByTrimmingCharactersInSet:set]; self.phoneNumberStr = [self.phoneNumberStr stringByTrimmingCharactersInSet:set]; if (![self.fullNameStr isEqualToString:@""] && ![self.addressStr isEqualToString:@""] && ![self.addressStr isEqualToString:[CDCommon localizedString:@"addressPlaceHolder"]] && ![self.phoneNumberStr isEqualToString:@""]) { self.saveButton.backgroundColor = [CDCommon colorForKey:@"DarkBlueThemeColor"]; self.saveButton.enabled = YES; }else{ self.saveButton.enabled = NO; self.saveButton.backgroundColor = [CDCommon colorForKey:@"feedbackSubmitColor"]; } }

remove监听

- (void)dealloc{ [[NSNotificationCenter defaultCenter] removeObserver:self]; }

4.单个textField的输入监听也可以通过添加事件来实现

[self.textField addTarget:self action:@selector(textFieldDidChange:) forControlEvents:UIControlEventEditingChanged];

- (void)textFieldDidChange:(UITextField *)textField{ textField.text = [textField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]]; if (textField.text.length > 5) { textField.text = [textField.text substringToIndex:5]; } }

【iOS-监听多个UITextField的输入事件来限制字数】键盘的各种样式

UIKeyboardTypeDefault,//默认键盘 Default type for the current input method. UIKeyboardTypeASCIICapable,// Displays a keyboard which can enter ASCII characters UIKeyboardTypeNumbersAndPunctuation,// Numbers and assorted punctuation. UIKeyboardTypeURL,// A type optimized for URL entry (shows . / .com prominently). UIKeyboardTypeNumberPad,// A number pad with locale-appropriate digits (0-9, ?-?, ?-?, etc.). 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). UIKeyboardTypeASCIICapableNumberPad NS_ENUM_AVAILABLE_IOS(10_0), // A number pad (0-9) that will always be ASCII digits.