ios UITextField 以及键盘显示总结

//
//  MyUITextFieldViewController.m
//  2020082901Test
//
//  Created by 张亚楠 on 2021/1/25.
//  Copyright © 2021 张亚楠. All rights reserved.
//

#import "MyUITextFieldViewController.h"
#import <Masonry.h>
@interface MyUITextFieldViewController ()<UITextFieldDelegate>
@property (nonatomic, strong, readwrite) UITextField *textField;
@property (nonatomic, strong, readwrite) UITextField *centerTextField;
@property (nonatomic, strong, readwrite) UITextField *bottomTextField;
@property (nonatomic, copy) NSMutableArray *textFieldArray;
@end

@implementation MyUITextFieldViewController
- (NSMutableArray *)textFieldArray {
    if (_textFieldArray == nil) {
        NSMutableArray *mArray = [NSMutableArray array];
        [mArray addObject:self.textField];
        [mArray addObject:self.centerTextField];
        [mArray addObject:self.bottomTextField];
        _textFieldArray = mArray;
    }
    return _textFieldArray;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.textField = [[UITextField alloc]init];
    self.centerTextField = [[UITextField alloc]init];
    self.bottomTextField = [[UITextField alloc]init];
    [self.view addSubview:self.textField];
    [self.view addSubview:self.centerTextField];
    [self.view addSubview:self.bottomTextField];

    [self.textField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view).offset(120);
        make.left.mas_equalTo(20);
        make.right.mas_equalTo(-20);
        make.height.mas_equalTo(40);
    }];
    [self.centerTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view).offset(400);
        make.left.mas_equalTo(20);
        make.right.mas_equalTo(-20);
        make.height.mas_equalTo(40);
    }];
    [self.bottomTextField mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.equalTo(self.view).offset(600);
        make.left.mas_equalTo(20);
        make.right.mas_equalTo(-20);
        make.height.mas_equalTo(40);
    }];
    
    [self initTextField:self.textField leftImage: [UIImage imageNamed:@"蓝色我的图标"]];
    [self initTextField:self.centerTextField leftImage: [UIImage imageNamed:@"蓝色我的图标"]];
    [self initTextField:self.bottomTextField leftImage: [UIImage imageNamed:@"蓝色我的图标"]];

    //设置returnKeyType，可以直接跳转到下一个填空
    for (int i = 0; i < self.textFieldArray.count; i++) {
        UITextField *textField =   self.textFieldArray[i];
        textField.delegate = self;
        textField.tag = i;
        textField.returnKeyType = i == (self.textFieldArray.count - 1) ? UIReturnKeyDefault : UIReturnKeyNext;
    }
    //添加键盘监听事件
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(yjd_keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
}

- (void)yjd_keyboardWillShow:(NSNotification *)notifi
{
    //获取键盘的高度
    NSDictionary *userInfo = [notifi userInfo];
    NSValue *aValue = [userInfo objectForKey:UIKeyboardFrameEndUserInfoKey];
    CGFloat keyboardHeight = [aValue CGRectValue].size.height;//键盘的高度
    //获取键盘动画时间
    CGFloat time = [notifi.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];

    //获取当前第一响应状态的输入框
    UIWindow *keyWindow = [[UIApplication sharedApplication] keyWindow];
    UIView *view = [keyWindow performSelector:@selector(firstResponder)];

    //输入框在当前屏幕的坐标y
    CGFloat maxY =  CGRectGetMaxY([view convertRect:view.bounds toView:[[[UIApplication sharedApplication] delegate] window]]);

    //判断是非遮挡当前输入框，小于0遮挡，大于或等于0没有
    CGFloat map = [UIScreen mainScreen].bounds.size.height  - maxY - keyboardHeight;
    NSLog(@"map = %f", map);
    if (map < 0) {
        [UIView animateWithDuration:time animations:^{
            self.view.transform = CGAffineTransformTranslate(self.view.transform, 0, map);
        }];
    }
}

//点击键盘return
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    if (textField.returnKeyType == UIReturnKeyNext) {
        NSLog(@"textFieldShouldReturn");
        UITextField *nextTextField = (UITextField *)[self.view viewWithTag:textField.tag + 1];
        [textField endEditing:YES];
        [nextTextField becomeFirstResponder];
    } else {
        NSLog(@"textFieldShouldReturn===transform");
        [self endEdit];
    }
    return YES;
}

//隐藏键盘
- (void)endEdit {
    [self.view endEditing:YES];
    self.view.transform = CGAffineTransformIdentity;
}
//点击其他位置隐藏键盘
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [self endEdit];
}

- (void)dealloc
{
    //移除通知
    [[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
}

//初始化UITextField
- (void)initTextField:(UITextField *)textField leftImage:(UIImage *)leftImage{
    //设置边框
    textField.layer.borderColor = [UIColor grayColor].CGColor;
    textField.layer.borderWidth = 1.0;
    textField.layer.cornerRadius = 10;

    //设置内边距、paddingTop、paddingLeft、paddingBottom、paddingRight
//    [textField setValue:[NSNumber numberWithInt:20] forKey:@"paddingLeft"];
   
    UIView *leftView=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 40, 40)];
    
    //设置左侧“返回”
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 8, 25, 24)];
    imageView.image =leftImage;
    [leftView addSubview:imageView];
    textField.leftView = leftView;

    
    //设置显示模式
    textField.leftViewMode = UITextFieldViewModeAlways;
    textField.clearButtonMode = UITextFieldViewModeWhileEditing;
    //设置代理
    textField.delegate = self;
}

@end

 

 

IOS开发－UI学习－UITextField的各种属性设置

//初始化textfield并设置位置及大小
  UITextField *text = [[UITextField alloc]initWithFrame:CGRectMake(20, 20, 130, 30)];

//设置边框样式，只有设置了才会显示边框样式
  text.borderStyle = UITextBorderStyleRoundedRect;

  typedef enum {
    UITextBorderStyleNone,
    UITextBorderStyleLine,
    UITextBorderStyleBezel,
    UITextBorderStyleRoundedRect
  } UITextBorderStyle;

//设置输入框的背景颜色，此时设置为白色 如果使用了自定义的背景图片边框会被忽略掉
   text.backgroundColor = [UIColor whiteColor];

//设置背景
  text.background = [UIImage imageNamed:@"dd.png"];

//设置背景
  text.disabledBackground = [UIImage imageNamed:@"cc.png"];

//当输入框没有内容时，水印提示 提示内容为password
  text.placeholder = @"password";

//设置输入框内容的字体样式和大小
  text.font = [UIFont fontWithName:@"Arial" size:20.0f];

//设置字体颜色
  text.textColor = [UIColor redColor];

//输入框中是否有个叉号，在什么时候显示，用于一次性删除输入框中的内容
  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;

//输入框中一开始就有的文字
  text.text = @"一开始就在输入框的文字";

//每输入一个字符就变成点 用语密码输入
  text.secureTextEntry = YES;

//是否纠错
  text.autocorrectionType = UITextAutocorrectionTypeNo;

typedef enum {
    UITextAutocorrectionTypeDefault, 默认
    UITextAutocorrectionTypeNo,   不自动纠错
    UITextAutocorrectionTypeYes,  自动纠错
} UITextAutocorrectionType;

//再次编辑就清空
  text.clearsOnBeginEditing = YES;

//内容对齐方式
  text.textAlignment = UITextAlignmentLeft;

//内容的垂直对齐方式  UITextField继承自UIControl,此类中有一个属性contentVerticalAlignment
  text.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;

//设置为YES时文本会自动缩小以适应文本窗口大小.默认是保持原来大小,而让长文本滚动
  textFied.adjustsFontSizeToFitWidth = YES;

//设置自动缩小显示的最小字体大小
  text.minimumFontSize = 20;

//设置键盘的样式
  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;

//首字母是否大写
  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;

//return键变成什么键
  text.returnKeyType =UIReturnKeyDone;

typedef enum {
    UIReturnKeyDefault, 默认 灰色按钮，标有Return
    UIReturnKeyGo,      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;

//键盘外观
textView.keyboardAppearance=UIKeyboardAppearanceDefault；
typedef enum {
UIKeyboardAppearanceDefault， 默认外观，浅灰色
UIKeyboardAppearanceAlert，     深灰 石墨色

} UIReturnKeyType;

//设置代理 用于实现协议
  text.delegate = self;

//把textfield加到视图中
  [self.window addSubview:text];

//最右侧加图片是以下代码   左侧类似
    UIImageView *image=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"right.png"]];
    text.rightView=image;
    text.rightViewMode = UITextFieldViewModeAlways;

typedef enum {
    UITextFieldViewModeNever,
    UITextFieldViewModeWhileEditing,
    UITextFieldViewModeUnlessEditing,
    UITextFieldViewModeAlways
} UITextFieldViewMode;

//按return键键盘往下收  becomeFirstResponder

类要采用UITextFieldDelegate协议

text.delegate = self;  声明text的代理是我，我会去实现把键盘往下收的方法 这个方法在UITextFieldDelegate里所以我们要采用UITextFieldDelegate这个协议

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [text resignFirstResponder];    //主要是[receiver resignFirstResponder]在哪调用就能把receiver对应的键盘往下收
    return YES;
}

重写绘制行为
除了UITextField对象的风格选项，你还可以定制化UITextField对象，为他添加许多不同的重写方法，来改变文本字段的显示行为。这些方法都会返回一个CGRect结构，制定了文本字段每个部件的边界范围。以下方法都可以重写。

– textRectForBounds:　　    //重写来重置文字区域
– drawTextInRect:
//改变绘文字属性.重写时调用super可以按默认图形属性绘制,若自己完全重写绘制函数，就不用调用super了.
– placeholderRectForBounds:
//重写来重置占位符区域
– drawPlaceholderInRect:
//重写改变绘制占位符属性.重写时调用super可以按默认图形属性绘制,若自己完全重写绘制函数，就不用调用super了.
– borderRectForBounds:
//重写来重置边缘区域
– editingRectForBounds:
//重写来重置编辑区域
– clearButtonRectForBounds:
//重写来重置clearButton位置,改变size可能导致button的图片失真
– leftViewRectForBounds:
– rightViewRectForBounds:

委托方法

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

//返回一个BOOL值，指定是否循序文本字段开始编辑

    return YES;
}

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

 //开始编辑时触发，文本字段将成为first responder
}

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

//返回BOOL值，指定是否允许文本字段结束编辑，当编辑结束，文本字段会让出first responder

//要想在用户结束编辑时阻止文本字段消失，可以返回NO

//这对一些文本字段必须始终保持活跃状态的程序很有用，比如即时消息

    return NO;
}

- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{

//当用户使用自动更正功能，把输入的文字修改为推荐的文字时，就会调用这个方法。
//这对于想要加入撤销选项的应用程序特别有用
//可以跟踪字段内所做的最后一次修改，也可以对所有编辑做日志记录,用作审计用途。
//要防止文字被改变可以返回NO
//这个方法的参数中有一个NSRange对象，指明了被改变文字的位置，建议修改的文本也在其中

     return YES;
}

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

//返回一个BOOL值指明是否允许根据用户请求清除内容
//可以设置在特定条件下才允许清除内容

     return YES;
}

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

//返回一个BOOL值，指明是否允许在按下回车键时结束编辑

//如果允许要调用resignFirstResponder 方法，这回导致结束编辑，而键盘会被收起[textField resignFirstResponder];
//查一下resign这个单词的意思就明白这个方法了

     return YES;
}