Day.02.26 UITextField

//  Copyright © 2016年 你国哥. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()
{
    UITextField *field;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    /*
     
        UITextField 文本输入框
     */
    
    //1.创建
    field = [[UITextField alloc]initWithFrame:CGRectMake(50, 50, 200, 50)];
    
    //2.显示
    [self.view addSubview:field];
    
    //3.属性
    /*
        继承自UIView的属性: tag  backgroundColor  hidden  userInteractionEnabled
     
        边框样式:
     UITextBorderStyleNone, 默认->无边框
     UITextBorderStyleLine, 边线
     UITextBorderStyleBezel, 立体阴影
     UITextBorderStyleRoundedRect 圆角矩形
     */
    field.borderStyle = UITextBorderStyleRoundedRect;
    
    //设置输入文本的字号
    field.font = [UIFont systemFontOfSize:26];
    
    //设置文本的颜色
    field.textColor = [UIColor greenColor];
    
    //设置对齐的方式
    field.textAlignment = NSTextAlignmentCenter;
    
    //设置文本内容
    field.text = @"设置文本内容";

屏幕快照 2016-02-26 上午10.24.51.png

    /*
        设置输入文本的大写方式
        
     UITextAutocapitalizationTypeNone,系统默认
     UITextAutocapitalizationTypeWords,单词首字母大写
     UITextAutocapitalizationTypeSentences,句子首字母大写
     UITextAutocapitalizationTypeAllCharacters,所有字母大写
     */
//    field.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;
    
    //输入框为空是的提示文本
    field.placeholder = @"请输入账号";

屏幕快照 2016-02-26 上午10.29.11.png

    //开启安全输入
    field.secureTextEntry = YES;

屏幕快照 2016-02-26 上午10.30.51.png

    /*
        输入框的清除按钮:输入框有内容的情况
     UITextFieldViewModeNever,  永远不显示x
     UITextFieldViewModeWhileEditing, 编辑时显示x
     UITextFieldViewModeUnlessEditing, 非编辑时显示x
     UITextFieldViewModeAlways  永远显示x
     */
    field.clearButtonMode = UITextFieldViewModeUnlessEditing;
    
    //第一响应者
    
    /*
     
        KeyBoard  键盘
     */
    
    /*
        UIReturnType:          return键的样式
     
     UIReturnKeyDefault,
     UIReturnKeyGo,
     UIReturnKeyGoogle,
     UIReturnKeyJoin,
     UIReturnKeyNext,
     UIReturnKeyRoute,
     UIReturnKeySearch,
     UIReturnKeySend,
     UIReturnKeyYahoo,
     UIReturnKeyDone,
     UIReturnKeyEmergencyCall,
     UIReturnKeyContinue
     */
    
    field.returnKeyType = UIReturnKeySend;
    
    /*
     
        键盘类型
     
     UIKeyboardTypeDefault,系统默认
     UIKeyboardTypeASCIICapable,
     UIKeyboardTypeNumbersAndPunctuation,
     UIKeyboardTypeURL,
     UIKeyboardTypeNumberPad,  输入数字时的键盘
     UIKeyboardTypePhonePad,   打电话时的键盘
     UIKeyboardTypeNamePhonePad,
     UIKeyboardTypeEmailAddress,
     UIKeyboardTypeDecimalPad
     UIKeyboardTypeTwitter
     UIKeyboardTypeWebSearch
     UIKeyboardTypeAlphabet = UIKeyboardTypeASCIICapable,
     */
    
    field.keyboardType = UIKeyboardAppearanceDefault;
    
    //代理
    field.delegate = self;
    
}

- (IBAction)tap:(UIButton *)sender {
    
    //成为第一相应者
//    [field becomeFirstResponder];
    
    //失去第一响应者
    [field resignFirstResponder];
    
}
    /*———————————————————————————代理设计模式————————————————————————————————————*/

    //A中定义协议c  添加一个属性di<c>
    //B成为A的delegate  B实现<c>的方法

#pragma mark --UITextFieldDelegate

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
    
    NSLog(@"将要开始编辑时");
    
    return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
    
    NSLog(@"已经开始编辑时");
}



- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{
    
    NSLog(@"将要结束编辑时");
    
    return YES;
}
- (void)textFieldDidEndEditing:(UITextField *)textField{
    
    NSLog(@"已经结束编辑时");
}




- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{
    
    NSLog(@"修改文本内容");
    
    NSLog(@"%@",NSStringFromRange(range));
    NSLog(@"%@",string);
    
    return YES;
    
}




- (BOOL)textFieldShouldClear:(UITextField *)textField{
    
    NSLog(@"清空");
    
    return YES;
    
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    
    NSLog(@"发送了内容:%@",field.text);
    
    return YES;
}


@end

border //边
roundedrect //圆角矩形
sentences //句子
mark //记号
delegate //代表
range //范围
clear //清空
placeholder //占位符