UITextField 的介绍，属性以及使用
//
// ZKViewController.m
// 01-UITextFieldDemo
//
#import "ZKViewController.h"
@interface ZKViewController ()<UITextFieldDelegate>
@end
@implementation ZKViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
//UITextField:输入框 作用：输入内容
//创建输入框
UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(100, 100, 160, 40)];
textField.center = CGPointMake(160, 120);
//类型
textField.borderStyle = UITextBorderStyleRoundedRect;
//设置背景色
textField.backgroundColor = [UIColor grayColor];
//显示
[self.view addSubview:textField];
//键盘弹回
/**
输入框： 知道输入的内容什么时候输完，不知道键盘什么时候弹回。
当前界面：知道键盘什么时候弹回，不知道内容什么时候输完
当内容输完时，怎么将键盘弹回？
通过代理
1.在输入框的类里面写协议，协议里面有控制键盘回收等功能的方法
2.让当前类引用协议
3.将当前类设置成输入框的代理类
4.在当前类里面写协议的相关方法的具体实现
*/
textField.delegate = self;
// Do any additional setup after loading the view.
}
//点解retun键执行的方法，作用：回收键盘
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
//第一响应项 ：当前正在响应（正在与用户进行交互）的对象
//键盘回收的做法：取消第一响应项
[textField resignFirstResponder];
//变成第一响应项(不常使用）
//[textField becomeFirstResponder];
return YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
//
// ZKViewController.m
// 02-UITextField的属性
//
#import "ZKViewController.h"
typedef enum{
UITextFieldTagWithText = 1,
UITextFieldTagWithPass
}UITextFieldTag;
@interface ZKViewController ()<UITextFieldDelegate>
@end
@implementation ZKViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// self.view.backgroundColor = [UIColor redColor];
//1.创建UITextField 输入用户名
UITextField *textField = [[UITextField alloc]initWithFrame:CGRectMake(100, 100, 160, 40)];
//设置中心
textField.center = CGPointMake(160, 120);
//设置背景颜色
textField.backgroundColor = [UIColor grayColor];
//设置样式
textField.borderStyle = UITextBorderStyleRoundedRect;
//显示
[self.view addSubview:textField];
textField.delegate = self;
//1.创建UITextField 输入密码
UITextField *passField = [[UITextField alloc]initWithFrame:CGRectMake(100, 160, 160, 40)];
//设置输入框的tag值
passField.tag = UITextFieldTagWithPass;
//设置中心
passField.center = CGPointMake(160, 180);
//设置背景颜色
passField.backgroundColor = [UIColor grayColor];
//设置样式
passField.borderStyle = UITextBorderStyleRoundedRect;
//显示
[self.view addSubview:passField];
passField.delegate = self;
//属性设置
//1.输入前默认提示文字
textField.placeholder = @"请输入用户名";
passField.placeholder = @"请输入密码";
//2添加清除按钮 总显示
textField.clearButtonMode = UITextFieldViewModeAlways;
passField.clearButtonMode = UITextFieldViewModeAlways;
//3安全输入
passField.secureTextEntry = YES;
//4设置背景图
//要想自定义背景图，先要将输入框的样式设置成非RoundRect
textField.borderStyle = UITextBorderStyleLine;
textField.background = [UIImage imageNamed:@"back"];
passField.borderStyle = UITextBorderStyleLine;
passField.background = [UIImage imageNamed:@"back"];
//5限制return键的使用，当输入框没有内容的时候，return键不可用
textField.enablesReturnKeyAutomatically = YES;
passField.enablesReturnKeyAutomatically = YES;
//6数字键盘
passField.keyboardType = UIKeyboardTypeNumberPad;
//7数字键盘回收
//创建一个view作为inputAccessoryView
UIView *view = [[UIView alloc]init];
view.frame = CGRectMake(0, 0, 320, 40);
view.backgroundColor = [UIColor grayColor];
//在view上面添加一个按钮，用来收回键盘
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeSystem];
backButton.frame = CGRectMake(10, 0, 100, 40);
[backButton setTitle:@"收回键盘" forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(keyBoardBack:) forControlEvents:UIControlEventTouchUpInside];
[view addSubview:backButton];
//将view作为inputAccessoryView属性视图，可以通过inputAccessoryView给键盘添加一些额外的共嫩（按钮，标签等）
passField.inputAccessoryView = view;
//8.再创建一个view
// UIView *viewInput = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 320, 100)];
//
// viewInput.backgroundColor = [UIColor redColor];
//重新设置输入框的inputView属性， 可以通过inputView属性设置自己的键盘
//passField.inputView = viewInput;
//9.增加输入框的左视图(文字）
//9.1增加文字
UILabel *leftLabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 70, 40)];
leftLabel.text = @"用户名：";
//9.2增加图片
UIImageView *imageViewLeft = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"head8_100x100"]];
imageViewLeft.frame = CGRectMake(0, 0, 40, 40);
//设置左视图
textField.leftView = imageViewLeft;
//设置显示方式
//注意：要想让左视图显示，必须设置显示方式
textField.leftViewMode = UITextFieldViewModeAlways;
//10.增加右视图
//注意：左视图与右视图同时存在的时候，必须创建两个独立的视图对象
UIImageView *imageViewRight = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"head8_100x100"]];
imageViewRight.frame = CGRectMake(0, 0, 40, 40);
textField.rightView = imageViewRight;
textField.rightViewMode = UITextFieldViewModeWhileEditing;
//11.去掉开头字母大写提示
textField.autocapitalizationType = UITextAutocapitalizationTypeNone;
//12.去掉纠错提醒
textField.autocorrectionType = UITextAutocorrectionTypeNo;
//13.自动缩小输入的文字，进行自适应显示
textField.adjustsFontSizeToFitWidth = YES;
//缩小到的最小尺寸号
textField.minimumFontSize = 5;
//1.创建UITextField 第三个对象
UITextField *thirdField = [[UITextField alloc]initWithFrame:CGRectMake(100, 20, 160, 80)];
//设置中心
thirdField.center = CGPointMake(160, 60);
//设置背景颜色
thirdField.backgroundColor = [UIColor grayColor];
//设置样式
thirdField.borderStyle = UITextBorderStyleRoundedRect;
//显示
[self.view addSubview:thirdField];
//14.调整文字的位置
//14.1上下（靠下面显示）
thirdField.contentVerticalAlignment = UIControlContentVerticalAlignmentBottom;
//14.2 水平（靠右边显示）
thirdField.textAlignment = NSTextAlignmentRight;
//15.文字的大小
thirdField.font = [UIFont systemFontOfSize:20];
// Do any additional setup after loading the view, typically from a nib.
}
//通过按钮方法是键盘回收
-(void)keyBoardBack:(UIButton *)button{
UITextField *pass = (UITextField *)[self.view viewWithTag:UITextFieldTagWithPass];
[pass resignFirstResponder];
}
//点击return键执行的方法
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
[textField resignFirstResponder];
return YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end