UI2_UITextField

//
//  ViewController.h
//  UI2_UITextField
//
//  Created by zhangxueming on 15/7/2.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITextFieldDelegate> //遵守协议

@end

//
//  ViewController.m
//  UI2_UITextField
//
//  Created by zhangxueming on 15/7/2.
//  Copyright (c) 2015年 zhangxueming. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController
//UITextField  ---  文本框

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(20, 100, self.view.frame.size.width-40, 50)];
    textField.backgroundColor = [UIColor cyanColor];
    //设置文本框的风格
    //设置圆角型风格
    textField.borderStyle = UITextBorderStyleRoundedRect;
    //设置默认提示文本,当开始编辑内容时候, 提示内容消失
    textField.placeholder = @"请输入文字";
    //设置文本框初始内容
    textField.text = @"hello world";
    //设置文本内容颜色
    textField.textColor = [UIColor redColor];
    //设置文本内容字体
    textField.font = [UIFont boldSystemFontOfSize:24];
    //设置文本对齐方式
    //textField.textAlignment = NSTextAlignmentCenter;
    //设置编辑文本时,清空原文本内容
    textField.clearsOnBeginEditing = YES;
    //设置显示清除按钮
    //UITextFieldViewModeNever,
    //UITextFieldViewModeWhileEditing,
    //UITextFieldViewModeUnlessEditing,
    //UITextFieldViewModeAlways
    textField.clearButtonMode = UITextFieldViewModeAlways;
    //设置左视图
    UIImageView *leftImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"003.png"]];
    //设置左视图的origin位置无效
    leftImageView.frame = CGRectMake(0, 0, 30, 30);
    textField.leftViewMode = UITextFieldViewModeAlways;
    textField.leftView = leftImageView;
    //设置右视图
    UIImageView *rightImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon.png"]];
    rightImageView.frame = CGRectMake(0, 0, 30, 30);
    textField.rightViewMode = UITextFieldViewModeAlways;
    textField.rightView = rightImageView;
    //在模拟器上切换键盘 command + K
    //shift + command + k 开启电脑键盘

    //设置暗文输入
    textField.secureTextEntry = YES;
    //设置键盘风格
    //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,

    textField.keyboardType = UIKeyboardTypeURL;
    //设置键盘return键风格
    textField.returnKeyType = UIReturnKeyDone;

    //设置竖直方向对齐方式
    textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
    //设置水平方向对齐方式
    //textField.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
    textField.delegate = self;

    UITextField *secondTextField = [[UITextField alloc] initWithFrame:CGRectMake(20, 200, self.view.frame.size.width-40, 50)];
    secondTextField.backgroundColor = [UIColor yellowColor];
    secondTextField.borderStyle = UITextBorderStyleRoundedRect;
    secondTextField.secureTextEntry = YES;

    [self.view addSubview:secondTextField];
    //设置window第一响应者身份
    [secondTextField becomeFirstResponder];

    //设置viewController作为textField的代理
    secondTextField.delegate = self;
    [self.view addSubview:textField];

    UILabel *label= [[UILabel alloc] initWithFrame:CGRectMake(20, 300, self.view.frame.size.width-40, 50)];
    label.backgroundColor = [UIColor grayColor];
    label.tag = 100;
    [self.view addSubview:label];
}

//代码标签
#pragma mark ----UITextFieldDelegate----

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
    NSLog(@"将要开始编辑");
    return YES;//返回NO不能进行后续的编辑
}

- (void)textFieldDidBeginEditing:(UITextField *)textField
{
    NSLog(@"文本开始编辑");
}

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

- (void)textFieldDidEndEditing:(UITextField *)textField
{
    NSLog(@"文本编辑结束");
    UILabel *label = (UILabel *)[self.view viewWithTag:100];
    label.text = textField.text;
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    NSLog(@"returnKey被点击");
    //隐藏键盘
    [textField resignFirstResponder];
    return YES;
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end