iOS开发篇——UITextField

今天药忘吃喽~ 2022-08-18 14:29 238阅读 0赞

官方UITextField

@interface UITextField : UIControl <UITextInput, NSCoding> 
    
    @property(nonatomic,copy)   NSString               *text;                 // 文本         default is nil
    @property(nonatomic,copy)   NSAttributedString     *attributedText NS_AVAILABLE_IOS(6_0); // default is nil
    @property(nonatomic,retain) UIColor                *textColor;            // 文本颜色      default is nil. use opaque black
    @property(nonatomic,retain) UIFont                 *font;                 // 文本字体      default is nil. use system font 12 pt
    @property(nonatomic)        NSTextAlignment         textAlignment;        // 文本的排版    default is NSLeftTextAlignment
    @property(nonatomic)        UITextBorderStyle       borderStyle;          // 边框的样式    default is UITextBorderStyleNone. If set to UITextBorderStyleRoundedRect, custom background images are ignored.
    @property(nonatomic,copy)   NSDictionary           *defaultTextAttributes NS_AVAILABLE_IOS(7_0); //文本属性 用字典填充 applies attributes to the full range of text. Unset attributes act like default values.
    
    @property(nonatomic,copy)   NSString               *placeholder;          // 文本填充      default is nil. string is drawn 70% gray
    @property(nonatomic,copy)   NSAttributedString     *attributedPlaceholder NS_AVAILABLE_IOS(6_0); // default is nil
    @property(nonatomic)        BOOL                    clearsOnBeginEditing; // 开始编辑的时候清空  default is NO which moves cursor to location clicked. if YES, all text cleared
    @property(nonatomic)        BOOL                    adjustsFontSizeToFitWidth; //自适应文本到宽度 default is NO. if YES, text will shrink to minFontSize along baseline
    @property(nonatomic)        CGFloat                 minimumFontSize;      //最小的文本大小 default is 0.0. actual min may be pinned to something readable. used if adjustsFontSizeToFitWidth is YES
    @property(nonatomic,assign) id<UITextFieldDelegate> delegate;             // 协议         default is nil. weak reference
    @property(nonatomic,retain) UIImage                *background;           // 背景         default is nil. draw in border rect. image should be stretchable
    @property(nonatomic,retain) UIImage                *disabledBackground;   // 禁用的背景    default is nil. ignored if background not set. image should be stretchable
    
    @property(nonatomic,readonly,getter=isEditing) BOOL editing;              //是否被编辑
    @property(nonatomic) BOOL allowsEditingTextAttributes NS_AVAILABLE_IOS(6_0); // default is NO. allows editing text attributes with style operations and pasting rich text
    @property(nonatomic,copy) NSDictionary *typingAttributes NS_AVAILABLE_IOS(6_0); // automatically resets when the selection changes
    
    // You can supply custom views which are displayed at the left or right
    // sides of the text field. Uses for such views could be to show an icon or
    // a button to operate on the text in the field in an application-defined
    // manner.
    // 
    // A very common use is to display a clear button on the right side of the
    // text field, and a standard clear button is provided. Note: if the clear
    // button overlaps one of the other views, the clear button will be given
    // precedence.
    
    @property(nonatomic)        UITextFieldViewMode  clearButtonMode; // sets when the clear button shows up. default is UITextFieldViewModeNever
    
    @property(nonatomic,retain) UIView              *leftView;        // e.g. magnifying glass
    @property(nonatomic)        UITextFieldViewMode  leftViewMode;    // sets when the left view shows up. default is UITextFieldViewModeNever
    
    @property(nonatomic,retain) UIView              *rightView;       // e.g. bookmarks button
    @property(nonatomic)        UITextFieldViewMode  rightViewMode;   // sets when the right view shows up. default is UITextFieldViewModeNever
    
    // drawing and positioning overrides
    
    - (CGRect)borderRectForBounds:(CGRect)bounds;
    - (CGRect)textRectForBounds:(CGRect)bounds;
    - (CGRect)placeholderRectForBounds:(CGRect)bounds;
    - (CGRect)editingRectForBounds:(CGRect)bounds;
    - (CGRect)clearButtonRectForBounds:(CGRect)bounds;
    - (CGRect)leftViewRectForBounds:(CGRect)bounds;
    - (CGRect)rightViewRectForBounds:(CGRect)bounds;
    
    - (void)drawTextInRect:(CGRect)rect;
    - (void)drawPlaceholderInRect:(CGRect)rect;
    
    // Presented when object becomes first responder.  If set to nil, reverts to following responder chain.  If
    // set while first responder, will not take effect until reloadInputViews is called.
    @property (readwrite, retain) UIView *inputView;             //键盘的view
    @property (readwrite, retain) UIView *inputAccessoryView;    //想在键盘上展示一个自定义的view时，你就可以设置该属性
    
    @property(nonatomic) BOOL clearsOnInsertion NS_AVAILABLE_IOS(6_0); // defaults to NO. if YES, the selection UI is hidden, and inserting text will replace the contents of the field. changing the selection will automatically set this to NO.
    
    @end

基本使用：

UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(100, 100, 200, 50)];
    textField.tag = 10;
    textField.borderStyle = UITextBorderStyleRoundedRect;//

#pragma mark - 关于文本的设置
    -(void)textSetting
    {
        //找到文本输入框
        UITextField *textField = (id)[self.view viewWithTag:10];
        //设置文字
    //    textField.text = @"我是文本框";
        //设置文字颜色
        textField.textColor = [UIColor redColor];
        //设置文字字体
        textField.font = [UIFont boldSystemFontOfSize:25];
        //设置文字对齐方式，默认居左
        textField.textAlignment = NSTextAlignmentRight;
        /**
         NSTextAlignmentLeft
         NSTextAlignmentRight
         NSTextAlignmentCenter
         */
        //设置文字自适应宽度
        textField.adjustsFontSizeToFitWidth = YES;
        //设置允许的最小字体，在adjustsFontSizeToFitWidth = YES，才有效
        textField.minimumFontSize = 17;
        
        //设置提示文字
        textField.placeholder = @"请输入用户名";
        //设置是否使用密文输入
    //    textField.secureTextEntry = YES;
        
        //设置开始编辑时，清除已有的文字
        textField.clearsOnBeginEditing = YES;
    }

#pragma mark - 关于样式的设置
    
    -(void)styleSetting
    {
        //找到已经创建好的UITextField
        UITextField *textField = (UITextField *)[self.view viewWithTag:10];
        //设置背景颜色
    //    textField.backgroundColor = [UIColor cyanColor];
        //设置边框样式
        textField.borderStyle = UITextBorderStyleNone;
        /**
         UITextBorderStyleNone
         无边框
         UITextBorderStyleLine
         线性矩形
         UITextBorderStyleBezel
         尖角矩形
         UITextBorderStyleRoundedRect
         圆角矩形
         */
        //通过layer设置圆角
        textField.layer.cornerRadius = 10;
        textField.layer.borderColor = [UIColor lightGrayColor].CGColor;
        textField.layer.borderWidth = 1;
        
        //设置是否显示清除按钮
        textField.clearButtonMode = UITextFieldViewModeUnlessEditing;
        //显示清除按钮的前提都是要有文字
        /**
         UITextFieldViewModeNever,
         //从不显示
         UITextFieldViewModeWhileEditing,
         //编辑时显示
         UITextFieldViewModeUnlessEditing,
         //非编辑时显示
         UITextFieldViewModeAlways
         //一直显示
         */
        
        //成为第一响应者
        //第一响应者，一个界面可能有多个可输入的控件，哪一个正在编辑哪一个就是第一响应者
        [textField becomeFirstResponder];
        
        //设置背景图片
        textField.background = [UIImage imageNamed:@"1.png"];
        //设置不可编辑时的背景图
        textField.disabledBackground = [UIImage imageNamed:@"5.png"];
        //设置是否可以编辑,YES 可以编辑，NO不可以
    //    textField.enabled = NO;
        UIView *leftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 50, 50)];
        leftView.backgroundColor = [UIColor magentaColor];
        //设置左视图,所有直接或间接继承于UIView的类的对象，都可以作为左视图
        textField.leftView = leftView;
        //设置左视图的显示模式
        textField.leftViewMode = UITextFieldViewModeAlways;
        
        UIView *rightView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 50, 50)];
        rightView.backgroundColor = [UIColor yellowColor];
        //设置右视图
        textField.rightView = rightView;
        //设置右视图的显示模式
        textField.rightViewMode = UITextFieldViewModeAlways;
    }

自定制输入键盘

创建一个协议：

@protocol KeyBoardViewDelegate <NSObject>
    
    
    -(void)inputText:(NSString *)text;
    
    @end

创建View

@interface KeyBoardView : UIView
    
    @property(nonatomic, assign) id <KeyBoardViewDelegate> delegate;
    
    @end

@implementation KeyBoardView
    
    -(instancetype)init
    {
        self = [super init];
        if (self) {
            CGSize size = [UIScreen mainScreen].bounds.size;
            self.frame = CGRectMake(0, 0, size.width, 258);
            [self createButtons];
        }
        return self;
        
    }
    
    -(void)createButtons
    {
        NSArray *array = @[@"1",@"2",@"3",@"4",@"5",@"6",@"7",@"8",@"9",@"0",@"+",@"-"];
        int i = 0;
        for (NSString *title in  array)
        {
            //遍历标题，创建按钮
            UIButton *button = [[UIButton alloc]init];
            button.backgroundColor = [UIColor lightGrayColor];
            button.frame = CGRectMake(10 + (i % 3) * 90, 10 + (i / 3) * 50, 85, 45);
            [button setTitle:title forState:UIControlStateNormal];
            [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
            button.titleLabel.font = [UIFont boldSystemFontOfSize:30];
            [button addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
            [self addSubview:button];
            i++;
        }
    }
    
    -(void)buttonClicked:(UIButton *)sender
    {
        //代理存在，且能响应inputText:这个方法
        if(_delegate && [_delegate respondsToSelector:@selector(inputText:)])
        {
            [_delegate inputText:sender.titleLabel.text];
        }
    }
    @end