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2015.3.19
UITextField文本输入框
【方法】
//背景文字
@property(nonatomic,copy) NSString *placeholder;
//正文
@property(nonatomic,copy) NSString *text;
//设置文本框的边框风格,可以设置为圆角矩形边框风格，默认风格为None
@property(nonatomic) UITextBorderStyle borderStyle;
//背景图（如果是圆角风格，图片将会失效，否则会显示图片，风格失效）
@property(nonatomic,retain) UIImage *background;
//文字超过范围以后自动变小
@property(nonatomic) BOOL adjustsFontSizeToFitWidth;
//最小能到几号
@property(nonatomic) CGFloat minimumFontSize;
//水平对齐方式（参考label）(一般用默认的左)
@property(nonatomic) NSTextAlignment textAlignment;
//垂直对齐方式（一般用默认的中间对齐）
@property(nonatomic) UIControlContentVerticalAlignment contentVerticalAlignment;
//键盘类型
@property(nonatomic) UIKeyboardType keyboardType;
//回车键类型
@property(nonatomic) UIReturnKeyType returnKeyType;
//安全输入模式（暗文加密）
@property(nonatomic,getter=isSecureTextEntry) BOOL secureTextEntry;
//激活输入状态时清空之前的内容
@property(nonatomic) BOOL clearsOnBeginEditing;
//清空按钮的出现模式
@property(nonatomic) UITextFieldViewMode clearButtonMode;
//左view及出现模式
@property(nonatomic,retain) UIView *leftView;
@property(nonatomic) UITextFieldViewMode leftViewMode;
//右view及出现模式
@property(nonatomic,retain) UIView *rightView;
@property(nonatomic) UITextFieldViewMode rightViewMode;
//这个属性默认就是键盘，如果设置某个view那么弹出来的就不是键盘，而是自己设置的view
@property (readwrite, retain) UIView *inputView;
//这个view是随着键盘一起弹出的view
@property (readwrite, retain) UIView *inputAccessoryView;
- (BOOL)becomeFirstResponder;//响应输入状态
- (BOOL)resignFirstResponder;//结束输入状态
UITextFieldDelegate 【代理方法】
//开始编辑
- (void)textFieldDidBeginEditing:(UITextField *)textField;
//结束编辑
- (void)textFieldDidEndEditing:(UITextField *)textField;
//回车时触发
- (BOOL)textFieldShouldReturn:(UITextField *)textField;
viewcontroller方法
//弹出一个新的viewController
- (void)presentViewController:(UIViewController *)viewControllerToPresent animated: (BOOL)flag completion:(void (^)(void))completion;
//销毁当前viewcontroller
- (void)dismissViewControllerAnimated: (BOOL)flag completion: (void (^)(void))completion;
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor yellowColor];
//创建一个文本输入框（一般用作输入账号密码等）
UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(40, 60, 240, 50)];
//提示语句
tf.placeholder = @"请输入账号";
//边框风格
tf.borderStyle = UITextBorderStyleRoundedRect;
tf.backgroundColor = [UIColor redColor];
//设置背景图，如果边框风格不是圆角，那么风格失效。
//如果边框风格是圆角，那么背景图失效
tf.background = [UIImage imageNamed:@"aa"];
tf.font = [UIFont systemFontOfSize:30];
//文字范围超过输入框时，文字会自动变小
tf.adjustsFontSizeToFitWidth = YES;
//文字自动变小的下限
tf.minimumFontSize = 20;
//左右对齐方式（同label）
tf.textAlignment = NSTextAlignmentLeft;
//上下对齐方式（btn的对齐方式也是这样设置）
tf.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
//在开始编辑的时候清空内容
tf.clearsOnBeginEditing = NO;
//清空按钮的出现模式
tf.clearButtonMode = UITextFieldViewModeAlways;
//安全输入（一般用于输入密码）
tf.secureTextEntry = NO;
//设置键盘的类型
tf.keyboardType = UIKeyboardTypeDefault;
//设置回车键的外观（只是外观，和功能本身没有关系）
tf.returnKeyType = UIReturnKeyDone;
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
view.backgroundColor = [UIColor greenColor];
//设置左view和出现模式
tf.leftView = view;
tf.leftViewMode = UITextFieldViewModeAlways;
UIView *blueView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 40)];
blueView.backgroundColor = [UIColor blueColor];
//设置键盘
// tf.inputView = blueView;
//键盘的附属view
tf.inputAccessoryView = blueView;
[self.view addSubview:tf];
tf.tag = 1;
}
//点击self.view时会触发此方法
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITextField *tf = (UITextField *)[self.view viewWithTag:1];
//收起键盘
[tf resignFirstResponder];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
self.view.backgroundColor = [UIColor yellowColor];
UITextField *nameTF = [[UITextField alloc] initWithFrame:CGRectMake(40, 60, 240, 40)];
nameTF.borderStyle = UITextBorderStyleRoundedRect;
nameTF.placeholder = @"请输入QQ号";
nameTF.tag = 1;
nameTF.delegate = self;
[self.view addSubview:nameTF];
}
//文本输入框被激活输入状态时响应
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog(@"tag = %d",textField.tag);
}
//结束输入状态时响应
- (void)textFieldDidEndEditing:(UITextField *)textField
{
NSLog(@"end = %d",textField.tag);
}
//点击回车键的时候触发
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
NSLog(@"text = %@",textField.text);
return YES;
}
//每次输入的时候都会触发
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
NSLog(@"%d===%@",range.location,string);
if (range.location == 10) {
return NO;
}
return YES;
}
// LoginViewController.m
// A3login
//
// Created by MS on 15-3-19.
// Copyright (c) 2015年 qf. All rights reserved.
//
#import "LoginViewController.h"
#import "HomeViewController.h"
#import "RegisterViewController.h"
@interface LoginViewController () <RegisterDelegate>
@end
@implementation LoginViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor redColor];
UITextField *nameTF = [[UITextField alloc] initWithFrame:CGRectMake(40, 60, 240, 40)];
nameTF.borderStyle = UITextBorderStyleRoundedRect;
nameTF.placeholder = @"请输入用户名";
[self.view addSubview:nameTF];
UITextField *passTF = [[UITextField alloc] initWithFrame:CGRectMake(40, 140, 240, 40)];
passTF.borderStyle = UITextBorderStyleRoundedRect;
passTF.placeholder = @"请输入密码";
passTF.secureTextEntry = YES;
[self.view addSubview:passTF];
nameTF.tag = 11;
passTF.tag = 12;
UIButton *logBtn = [UIButton buttonWithType:UIButtonTypeSystem];
logBtn.frame = CGRectMake(60, 220, 60, 30);
[logBtn setTitle:@"login" forState:UIControlStateNormal];
logBtn.backgroundColor = [UIColor grayColor];
[logBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
logBtn.tag = 1;
[self.view addSubview:logBtn];
UIButton *registBtn = [UIButton buttonWithType:UIButtonTypeSystem];
registBtn.frame = CGRectMake(200, 220, 60, 30);
[registBtn setTitle:@"register" forState:UIControlStateNormal];
registBtn.backgroundColor = [UIColor grayColor];
[registBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
registBtn.tag = 2;
[self.view addSubview:registBtn];
}
- (void)btnClick:(UIButton *)sender
{
NSLog(@"tag = %ld",sender.tag);
if (sender.tag == 2) {
RegisterViewController *rvc = [[RegisterViewController alloc] init];
rvc.delegate = self;
[self presentViewController:rvc animated:YES completion:nil];
return;
}
UITextField *nameTF = (UITextField *)[self.view viewWithTag:11];
//如果文本输入框里的文字长度为0
if (!nameTF.text.length) {
NSLog(@"请输入用户名");
return;
}
HomeViewController *hvc = [[HomeViewController alloc] init];
hvc.nameStr = nameTF.text;
//弹出一个新的视图
[self presentViewController:hvc animated:YES completion:nil];
}
//委托的回调方法（代理方法、协议方法）
- (void)sendInfoName:(NSString *)nameStr password:(NSString *)passStr
{
NSLog(@"%@====%@",nameStr,passStr);
UITextField *nameTF = (UITextField *)[self.view viewWithTag:11];
UITextField *passTF = (UITextField *)[self.view viewWithTag:12];
nameTF.text = nameStr;
passTF.text = passStr;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// HomeViewController.h
// A3login
//
// Created by MS on 15-3-19.
// Copyright (c) 2015年 qf. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface HomeViewController : UIViewController
@property (nonatomic, copy) NSString *nameStr;
@end
// HomeViewController.m
// A3login
//
// Created by MS on 15-3-19.
// Copyright (c) 2015年 qf. All rights reserved.
//
#import "HomeViewController.h"
@interface HomeViewController ()
@end
@implementation HomeViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
//退出当前页面（必须是被present出来的才能dismiss）
[self dismissViewControllerAnimated:YES completion:nil];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor yellowColor];
UILabel *label = [[UILabel alloc] initWithFrame:self.view.bounds];
label.text = self.nameStr;
[self.view addSubview:label];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
// RegisterViewController.h
// A3login
//
// Created by MS on 15-3-19.
// Copyright (c) 2015年 qf. All rights reserved.
//
#import <UIKit/UIKit.h>
@protocol RegisterDelegate <NSObject>
- (void)sendInfoName:(NSString *)nameStr password:(NSString *)passStr;
@end
@interface RegisterViewController : UIViewController
@property (nonatomic, assign) id <RegisterDelegate> delegate;
@end
// RegisterViewController.m
// A3login
//
// Created by MS on 15-3-19.
// Copyright (c) 2015年 qf. All rights reserved.
//
#import "RegisterViewController.h"
@interface RegisterViewController () <UITextFieldDelegate>
@end
@implementation RegisterViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor purpleColor];
NSArray *titleArr = [NSArray arrayWithObjects:@"用户名", @"密码", @"手机号", @"邮箱", nil];
for (int i = 0; i<4; i++) {
UITextField *tf = [[UITextField alloc] initWithFrame:CGRectMake(40, 50+i*60, 240, 30)];
tf.borderStyle = UITextBorderStyleRoundedRect;
tf.placeholder = titleArr[i];
if (i == 3) {
tf.returnKeyType = UIReturnKeyDone;
} else {
tf.returnKeyType = UIReturnKeyNext;
}
tf.delegate = self;
tf.tag = 100+i;
[self.view addSubview:tf];
}
UIButton *logBtn = [UIButton buttonWithType:UIButtonTypeSystem];
logBtn.frame = CGRectMake(60, 300, 60, 30);
[logBtn setTitle:@"确定" forState:UIControlStateNormal];
logBtn.backgroundColor = [UIColor grayColor];
[logBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
logBtn.tag = 1;
[self.view addSubview:logBtn];
UIButton *registBtn = [UIButton buttonWithType:UIButtonTypeSystem];
registBtn.frame = CGRectMake(200, 300, 60, 30);
[registBtn setTitle:@"取消" forState:UIControlStateNormal];
registBtn.backgroundColor = [UIColor grayColor];
[registBtn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];
registBtn.tag = 2;
[self.view addSubview:registBtn];
}
- (void)btnClick:(UIButton *)sender
{
if (sender.tag == 1) {
UITextField *nameTF = (UITextField *)[self.view viewWithTag:100];
UITextField *passTF = (UITextField *)[self.view viewWithTag:101];
[self.delegate sendInfoName:nameTF.text password:passTF.text];
}
[self dismissViewControllerAnimated:YES completion:nil];
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
if (textField.tag == 103) {
//取消输入状态
[textField resignFirstResponder];
} else {
//找到下一个文本框
UITextField *tf = (UITextField *)[self.view viewWithTag:textField.tag + 1];
//让文本输入框激活输入状态
[tf becomeFirstResponder];
}
return YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
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原文地址：http://www.cnblogs.com/-yun/p/UI_Day4.html
