//1、    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(30, 100, 260, 40)];    //2、//    textField.backgroundColor = [UIColor redColor];        //属性    //设置文字颜色：textColor    textField.textColor = [UIColor redColor];    //边框状态：borderStyle    /*     1、UITextBorderStyleRoundedRect   圆角     2、UITextBorderStyleLine          黑色直角边框     3、UITextBorderStyleBezel         灰色直角边框     4、UITextBorderStyleNone          无边框     */    textField.borderStyle = UITextBorderStyleRoundedRect;    //文字水平对齐：textAlignment   默认左对齐    textField.textAlignment = NSTextAlignmentLeft;    //文字垂直对齐：contentVerticalAlignment    默认居中    textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;    //设置字号：font    textField.font = [UIFont systemFontOfSize:20.0];    //自适应文字大小:adjustsFontSizeToFitWidth    textField.adjustsFontSizeToFitWidth = YES;    //设置最小字号：minimumFontSize    textField.minimumFontSize = 20.0;    //默认文字：text    textField.text = @"hello world”;    //提示文字:placeholder    textField.placeholder = @"请输入账号";    //密文：secureTextEntry    textField.secureTextEntry = NO;    //输入框是否可用：enabled    textField.enabled = YES;    //return键的类型:returnKeyType    /*     1、UIReturnKeyDefault         return     2、UIReturnKeyDone            Done     3、UIReturnKeyEmergencyCall   EmergencyCall     4、UIReturnKeyGoogle=UIReturnKeyYahoo=UIReturnKeySearch   Search     5、UIReturnKeyJoin   Join     .     .     .     */    textField.returnKeyType = UIReturnKeyJoin;    //键盘类型：keyboardType    /*     1、UIKeyboardTypeDefault   数字，符号，中英文     2、UIKeyboardTypeNumberPad   数字键盘     3、UIKeyboardTypeWebSearch  网址  .     4、UIKeyboardTypeURL     .com  /   .     5、UIKeyboardTypeEmailAddress   @  .     6、UIKeyboardTypeNumbersAndPunctuation   数字 符号     .     .     .     */    textField.keyboardType = UIKeyboardTypeDefault;    //键盘颜色:keyboardAppearance    /*     1、UIKeyboardAppearanceDefault=UIKeyboardAppearanceLight  浅灰色     2、UIKeyboardAppearanceAlert=UIKeyboardAppearanceDark   深灰色     */    textField.keyboardAppearance = UIKeyboardAppearanceDefault;    //背景图片：background    当边框状态为圆角时，背景图片无效    textField.background = [UIImage imageNamed:@"map.png"];    //一键清除按钮:clearButtonMode    /*     1、UITextFieldViewModeAlways         一直出现     2、UITextFieldViewModeNever          永不出现     3、UITextFieldViewModeWhileEditing   输入框编辑文字时出现，不编辑时消失     4、UITextFieldViewModeUnlessEditing  输入框编辑文字时消失，不编辑时出现     */    textField.clearButtonMode = UITextFieldViewModeUnlessEditing;    //再次编辑是否清空之前的文字：clearsOnBeginEditing   YES：清空    textField.clearsOnBeginEditing = YES;    //是否自动大写：autocapitalizationType    /*     1、UITextAutocapitalizationTypeAllCharacters   所有字母都大写     2、UITextAutocapitalizationTypeNone    所有字母都不大写     3、UITextAutocapitalizationTypeSentences   每个句子的首字母大写     4、UITextAutocapitalizationTypeWords   每个单词的首字母大写     */    textField.autocapitalizationType = UITextAutocapitalizationTypeWords;    //是否自动纠错：autocorrectionType    /*     1、UITextAutocorrectionTypeDefault   默认     2、UITextAutocorrectionTypeNo   不纠错     3、UITextAutocorrectionTypeYes   纠错     */    textField.autocorrectionType = UITextAutocorrectionTypeYes;    //设置左视图:leftView    //设置位置无效    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];    view.backgroundColor = [UIColor redColor];    textField.leftView = view;    //左视图出现状态:leftViewMode    textField.leftViewMode = UITextFieldViewModeAlways;    //设置右视图：rightView    UIView *view2 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];    view2.backgroundColor = [UIColor yellowColor];//    textField.rightView = view2;    //右视图出现状态:rightViewMode//    textField.rightViewMode = UITextFieldViewModeAlways;        //不同的位置，不能用相同的view        //键盘上面的view:inputAccessoryView    UIView *view3 = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];    view3.backgroundColor = [UIColor purpleColor];    textField.inputAccessoryView = view3;        //获取输入框里面的文字:textField.text    NSString *str = textField.text;    NSLog(@"%@",str);        /**************!!!!!!delegate!!!!!!!*************/    textField.delegate = self;        [textField becomeFirstResponder];        //3、    [self.view addSubview:textField];#pragma mark - UITextFieldDelegate//return键的方法  *****- (BOOL)textFieldShouldReturn:(UITextField *)textField{    //输入框失去响应：键盘收回，光标消失    [textField resignFirstResponder];        //输入框开始响应：键盘出现，光标出现//    [textField becomeFirstResponder];        return YES;}//一键删除按钮的方法- (BOOL)textFieldShouldClear:(UITextField *)textField{    //返回YES：一键删除有效   返回NO：一键删除无效        if ([textField.text isEqualToString:@"123"]) {        return NO;    }    return YES;}//输入框是否可以开始编辑- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{    return YES;}//输入框是否可以结束编辑   **- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{    if (textField.text.length < 11) {        return NO;    }    return YES;}//输入框开始响应就调用的方法   ****- (void)textFieldDidBeginEditing:(UITextField *)textField{    NSLog(@"textFieldDidBeginEditing");}//输入框结束响应就调用的方法   ****- (void)textFieldDidEndEditing:(UITextField *)textField{    NSLog(@"textFieldDidEndEditing");}//页面跳转    //第一个参数：即将跳转的页面    //第二个参数：带不带动画效果    //第三个参数：跳转结束后所做的操作        //实例化第二个页面    SecondViewController *second = [[SecondViewController alloc] init];    //跳转的操作：从下向上出现    [self presentViewController:second animated:YES completion:^{        //        NSLog(@"second");    }];    //返回上一页:从上向下消失    [self dismissViewControllerAnimated:YES completion:^{        //    }];//页面生命周期//页面即将出现- (void)viewWillAppear:(BOOL)animated{    [super viewWillAppear:animated];    NSLog(@"1");}//页面已经出现- (void)viewDidAppear:(BOOL)animated{    [super viewDidAppear:animated];    NSLog(@"2");}//页面即将消失- (void)viewWillDisappear:(BOOL)animated{    [super viewWillDisappear:animated];    NSLog(@"3");}//页面已经消失- (void)viewDidDisappear:(BOOL)animated{    [super viewDidDisappear:animated];    NSLog(@"4");}