iOS控件之UITextField

文本输入控件UITextField

 一，作用：用户输入文字

 二，常用属性

// 设置和获取文本内容，默认nil

@property(nonatomic,copy)   NSString   *text;

// 设置文本内容颜色

@property(nonatomic,retain) UIColor  *textColor;

// 设置字体

@property(nonatomic,retain) UIFont   *font

// 对齐样式

@property(nonatomic)  NSTextAlignment  textAlignment;

// 设置风格，默认没有风格，需要设置

@property(nonatomic)    UITextBorderStyle   borderStyle;

// 提示用户输入内容文本

@property(nonatomic,copy)   NSString  *placeholder;

// 用户编辑时是否clear内容，默认为NO

@property(nonatomic)   BOOL   clearsOnBeginEditing;

// 自适应调整字体大小,默认为NO

@property(nonatomic)    BOOL    adjustsFontSizeToFitWidth;

三，常用属性

// 设置代理

@property(nonatomic,assign) id<UITextFieldDelegate> delegate;

// 设置背景，需要将textField实例的风格设置为None

@property(nonatomic,retain) UIImage *background;

// 设置textField不可用时的背景图片

@property(nonatomic,retain) UIImage *disabledBackground;

// 设置是否可编辑

@property(nonatomic,readonly,getter=isEditing) BOOL editing;

// 清除按钮的模式，默认不出现

@property(nonatomic)         UITextFieldViewMode  clearButtonMode;

// 自定义左视图

@property(nonatomic,retain) UIView   *leftView;

// 自定义左视图出现的模式

@property(nonatomic)         UITextFieldViewMode  leftViewMode;

// 不用系统键盘，自定义键盘

@property (readwrite, retain) UIView *inputView;

// 系统键盘和自定义键盘共存

@property (readwrite, retain) UIView *inputAccessoryView;

// 自动大写类型

@property(nonatomic) UITextAutocapitalizationType autocapitalizationType;

// 检查拼写是否正确

@property(nonatomic) UITextAutocorrectionType autocorrectionType;

// 修改键盘类型

@property(nonatomic) UIKeyboardType keyboardType;

// 修改返回类型

@property(nonatomic) UIReturnKeyType returnKeyType;

// 是否安全输入，比如用户输入密码

@property(nonatomic,getter=isSecureTextEntry) BOOL secureTextEntry;

四，UITextFieldDemo

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.window.backgroundColor = [UIColor purpleColor];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button.frame = CGRectMake(90, 80, 140, 35);
[button addTarget:self action:@selector(test) forControlEvents:UIControlEventTouchUpInside];
[self.window addSubview:button];

UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(60, 180, 200, 35)];
tf.tag = 101;
tf.delegate = self; // 设置代理
tf.textColor = [UIColor redColor];
tf.placeholder = @"用来提示用户";
tf.adjustsFontSizeToFitWidth = YES;
tf.clearsOnBeginEditing = YES;
tf.clearButtonMode = UITextFieldViewModeWhileEditing;
//    tf.background = [UIImage imageNamed:@"navigation"];
tf.borderStyle = UITextBorderStyleRoundedRect;
[self.window addSubview:tf];
[tf release];

// 成为第一响应者
//    [tf becomeFirstResponder];

// 自定义clear按钮
//    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 20, 20)];
//    view.backgroundColor = [UIColor yellowColor];
//    tf.rightView = view;
//    [view release];
//    tf.rightViewMode = UITextFieldViewModeUnlessEditing;

// 自定义系统键盘
//    UIView *csView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 200)];
//    csView.backgroundColor = [UIColor yellowColor];
//    tf.inputView = csView;
//    [csView release];

// 共用
//    UIView *csView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
//    csView.backgroundColor = [UIColor yellowColor];
//    tf.inputAccessoryView = csView;
//    [csView release];
//    tf.secureTextEntry = YES;//设置密码
//    tf.keyboardType = UIKeyboardTypeNumberPad;
//    tf.returnKeyType = UIReturnKeyDone;
tf.autocapitalizationType = UITextAutocapitalizationTypeNone;

[self.window makeKeyAndVisible];
return YES;
}

- (void)test
{
UITextField *tf = (UITextField *)[self.window viewWithTag:101];
// 将键盘移除
[tf resignFirstResponder];
}