텍스트 필드는 무엇을 의미하나요?

UITextField *text = [[UITextField alloc]initWithFrame:CGRectMake(20, 20, 130, 30)];

text.borderStyle = UITextBorderStyleRoundedRect;
typedef enum {
UITextBorderStyleNone,
UITextBorderStyleLine,
UITextBorderStyleBezel,
UITextBorderStyleRoundedRect
} UITextBorderStyle;

text.backgroundColor = [UIColor whiteColor];

text.background = [UIImage imageNamed:@"dd.png"];

text.disabledBackground = [UIImage imageNamed:@"cc.png"];

text.placeholder = @"password";

text.font = [UIFont fontWithName:@"Arial" size:20.0f];

text.textColor = [UIColor redColor];

text.clearButtonMode = UITextFieldViewModeAlways;
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;

text.text = @"一开始就在输入框的文字";

text.secureTextEntry = YES;

text.autocorrectionType = UITextAutocorrectionTypeNo;
typedef enum {UITextAutocorrectionTypeDefault, 
默认UITextAutocorrectionTypeNo, 
不自动纠错UITextAutocorrectionTypeYes, 
自动纠错} UITextAutocorrectionType;

text.clearsOnBeginEditing = YES;

text.textAlignment = UITextAlignmentLeft;

text.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

textFied.adjustsFontSizeToFitWidth = YES;

text.minimumFontSize = 20;

text.keyboardType = UIKeyboardTypeNumberPad;
typedef enum {UIKeyboardTypeDefault, 
默认键盘，支持所有字符UIKeyboardTypeASCIICapable, 
支持ASCII的默认键盘UIKeyboardTypeNumbersAndPunctuation, 
标准电话键盘，支持＋＊＃字符UIKeyboardTypeURL, 
URL键盘，支持.com按钮 只支持URL字符UIKeyboardTypeNumberPad, 
数字键盘UIKeyboardTypePhonePad, 
电话键盘UIKeyboardTypeNamePhonePad, 
电话键盘，也支持输入人名UIKeyboardTypeEmailAddress, 
用于输入电子 邮件地址的键盘UIKeyboardTypeDecimalPad, 
数字键盘 有数字和小数点UIKeyboardTypeTwitter, 
优化的键盘，方便输入@、#字符UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable,} UIKeyboardType;

text.autocapitalizationType = UITextAutocapitalizationTypeNone;
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;

text.returnKeyType =UIReturnKeyDone;
typedef enum {
UIReturnKeyDefault, 默认 灰色按钮，标有
ReturnUIReturnKeyGo, 标有Go的蓝色按钮UIReturnKeyGoogle, 标有Google的蓝色按钮，
用语搜索UIReturnKeyJoin, 
标有Join的蓝色按钮UIReturnKeyNext, 
标有Next的蓝色按钮UIReturnKeyRoute, 
标有Route的蓝色按钮UIReturnKeySearch, 
标有Search的蓝色按钮UIReturnKeySend, 
标有Send的蓝色按钮UIReturnKeyYahoo, 
标有Yahoo的蓝色按钮UIReturnKeyYahoo, 
标有Yahoo的蓝色按钮UIReturnKeyEmergencyCall, 
紧急呼叫按钮} UIReturnKeyType;

textView.keyboardAppearance=UIKeyboardAppearanceDefault；
typedef enum 
{UIKeyboardAppearanceDefault， 
默认外观，浅灰色UIKeyboardAppearanceAlert， 深灰 石墨色
} UIReturnKeyType;

text.delegate = self;

[self.window addSubview:text];

UIImageView *image=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"right.png"]];
text.rightView=image;
text.rightViewMode = UITextFieldViewModeAlways;