iOS—UITextField的使用方法

创建一个新窗体

    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];     self.window.backgroundColor = [UIColor whiteColor];     [self.window makeKeyAndVisible];

// UITextField的常用方法

// 两种创建方法

UITextField *textField = [[ UITextField alloc] init];

UITextField *textField = [[ UITextField alloc] initWithFrame:CGRextMake(50. 100, 200, 40)];

// 最常用

textField. frame =  CGRectMake ( 30 ,  30 ,  260 , 35 );   // 设置位置

textField. backgroundColor  = [UIColor grayColor];  // 设置背景颜色

textField. alpha =  1.0 ;  // 设置透明度，范围从0.0-1.0之间

textField. textColor = [ UIColor redColor];  // 设置文字的颜色

textField. text =  @"默认的文字" ;   // 设置默认的文字

textField. clearsOnBeginEditing = YES ;       // 当第二次输入的时候，清空上一次的内容

textField. placeholder =  @"这是提示文字" ;  // 显示提示文件，当输入文字时将自动消失

textField. font = [ UIFont boldSystemFontOfSize : 25.0f ];  // 设置字体的大小

textField. textAlignment =  NSTextAlignmentCenter ;  // 设置文字的对其方式

// 对其的样式如下

//    typedef NS_ENUM(NSInteger, NSTextAlignment) {

//        NSTextAlignmentLeft      = 0,    // Visually left aligned

//#if TARGET_OS_IPHONE

//        NSTextAlignmentCenter    = 1,    // Visually centered

//        NSTextAlignmentRight     = 2,    // Visually right aligned

//#else

//        NSTextAlignmentRight     = 1,    // Visually right aligned

//        NSTextAlignmentCenter    = 2,    // Visually centered

//#endif

//        NSTextAlignmentJustified = 3,    // Fully-justified. The last line in a paragraph is natural-aligned.

//        NSTextAlignmentNatural   = 4,    // Indicates the default alignment for script

//    } NS_ENUM_AVAILABLE_IOS(6_0);

// 设置textField的样式

textField. borderStyle = UITextBorderStyleRoundedRect ; // 设置输入框的样式

textField. minimumFontSize =  20.0f ;   // 设置自动缩小显示的最小字体大小 

textField. tag =  1001 ;   // 设置textField的标签，主要用在委托方法中

textField. secureTextEntry =  NO ;  // 设置是否以密码的圆点形式显示

textField. autocorrectionType =  YES ;  // 设置是否启动自动提醒更新功能

textField. returnKeyType =  UIReturnKeyDefault ;   // 设置弹出的键盘带形式与带的按键

// 以下是弹出的键盘的带按钮的全部样式

//    typedef NS_ENUM(NSInteger, UIReturnKeyType) {

//        UIReturnKeyDefault, // 默认的样式

//        UIReturnKeyGo, // 带一个go按钮

//        UIReturnKeyGoogle, // 带一个Search按钮，使用google搜索

//        UIReturnKeyJoin, // 带一个Join按钮，登录时使用

//        UIReturnKeyNext, // 带一个Next按钮，进入下一个输入框

//        UIReturnKeyRoute, // 带一个Route按钮（路线）

//        UIReturnKeySearch, // 带一个Search按钮（搜索）

//        UIReturnKeySend, // 带一个Send按钮（发送）

//        UIReturnKeyYahoo, // 带一个Search，使用yahoo搜索（搜索）

//        UIReturnKeyDone, // 带一个Done按钮（完成）

//        UIReturnKeyEmergencyCall, // 带一个emergency call按钮（紧急电话）

//    };

textField. keyboardType  =  UIKeyboardTypeNamePhonePad ;  // 弹出的键盘的样式

// 以下是所有弹出的键盘的样式

//    typedef NS_ENUM(NSInteger, UIKeyboardType) {

//        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).

//#if __IPHONE_4_1 <= __IPHONE_OS_VERSION_MAX_ALLOWED

//        UIKeyboardTypeDecimalPad,             // A number pad with a decimal point.

//#endif

//#if __IPHONE_5_0 <= __IPHONE_OS_VERSION_MAX_ALLOWED

//        UIKeyboardTypeTwitter,                // A type optimized for twitter text entry (easy access to @ #)

//#endif

//        

//        UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable, // Deprecated

//        

//    };

textField. contentVerticalAlignment =  UIControlContentVerticalAlignmentCenter ;  // 输入的对其方法

textField. autoresizingMask  =  UIViewAutoresizingFlexibleHeight ;  // 自动适应高度

textField. clearButtonMode  =  UITextFieldViewModeWhileEditing ;  // 编辑的时候会显示出删除全部的小X

// 出现删除全部小X的时间

//    typedef enum {

//        UITextFieldViewModeNever // 重不出现

//        UITextFieldViewModeWhileEditing, // 编辑时出现

//        UITextFieldViewModeUnlessEditing, // 除了编辑外都出现

//        UITextFieldViewModeAlways  // 一直出现

//    } UITextFieldViewMode;

//首字母是否大写

textField. autocapitalizationType =  UITextAutocapitalizationTypeNone ;

// 以下是字母大写的几种情况

//    typedef enum {

//        UITextAutocapitalizationTypeNone, // 不自动大写

//        UITextAutocapitalizationTypeWords, // 单词首字母大写

//        UITextAutocapitalizationTypeSentences, // 句子的首字母大写

//        UITextAutocapitalizationTypeAllCharacters, // 所有字母都大写

//    } UITextAutocapitalizationType;

//键盘外观

textField. keyboardAppearance  = UIKeyboardAppearanceAlert ;

//    typedef enum {

//        UIKeyboardAppearanceDefault， // 默认外观，浅灰色

//        UIKeyboardAppearanceAlert，   // 深灰 石墨色

//    } UIReturnKeyType;

//最右侧加图片是以下代码 左侧类似

UIImageView *image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"ic_action_stat_share.png"]];

// textField.rightView = image;

// textField.rightViewMode = UITextFieldViewModeAlways;

textField. leftView = image;

textField. leftViewMode =  UITextFieldViewModeAlways ;

//    typedef enum {

//        UITextFieldViewModeNever,

//        UITextFieldViewModeWhileEditing,

//        UITextFieldViewModeUnlessEditing,

//        UITextFieldViewModeAlways

//    } UITextFieldViewMode;

// 要想设置委托，就需要实现协议，需要在.h文件中添加协议

textField. delegate =  self ;   // 设置委托

// 添加到view上，并释放内存

[ self . view addSubview :textField];

[textField  release ], textField = nil;

//当开始点击textField会调用的方法

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

NSLog( @"开始编辑" );

}

//当textField编辑结束时调用的方法

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

NSLog( @"结束编辑" );

}

//按下Done按钮的调用方法，我们让键盘消失

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

[textField resignFirstResponder];

return YES ;

}