ui

#import "ViewController.h"

#import "Person.h"

@interface ViewController ()<UITextFieldDelegate, UIAlertViewDelegate>

{

UIImageView *_imgView;

NSMutableArray *_personsArray; //存放所有注册用户的信息

}

@end

@implementation ViewController

- (UIButton *)customButton:(NSString *)title frame:(CGRect)frame action:(SEL)action

{

UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

btn.frame = frame;

[btn setTitle:title forState:UIControlStateNormal];

[btn addTarget:self action:action forControlEvents:UIControlEventTouchUpInside];

return btn;

}

- (void)dealloc

{

[[NSNotificationCenter defaultCenter]removeObserver:self name:UITextFieldTextDidChangeNotification object:nil];

//....

}

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

_personsArray = [[NSMutableArray alloc]init];

_imgView = [[UIImageView alloc]initWithFrame:CGRectMake(10, 20, 100, 100)];

_imgView.image = [UIImage imageNamed:@"image1"];

//设置图片的动画数组，数组中存放的是UIImage的对象

[_imgView setAnimationImages:@[[UIImage imageNamed:@"image1"], [UIImage imageNamed:@"image2"],[UIImage imageNamed:@"image3"], [UIImage imageNamed:@"image4"]]];

//设置播放一次所需的时间

_imgView.animationDuration = 1.2;

//指定动画重复的次数

_imgView.animationRepeatCount = 0;

//开始动画

[_imgView startAnimating];

[self.view addSubview:_imgView];

UIButton *stopBtn = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];

[stopBtn addTarget:self action:@selector(onClickedStop) forControlEvents:UIControlEventTouchUpInside];

stopBtn.frame = CGRectMake(120, 20, 40, 40);

[self.view addSubview:stopBtn];

//文本框

UITextField *tf1 = [[UITextField alloc]initWithFrame:CGRectMake(100, 150, 100, 24)];

tf1.tag = 10;

tf1.backgroundColor = [UIColor whiteColor];

tf1.borderStyle = UITextBorderStyleNone;

// tf1.text = @"iOS";

tf1.textColor = [UIColor blueColor]; //文字颜色

tf1.font = [UIFont systemFontOfSize:20]; //字体

tf1.textAlignment = NSTextAlignmentCenter;

tf1.placeholder = @"请输入"; //提示

tf1.adjustsFontSizeToFitWidth = YES;

tf1.minimumFontSize = 17;

// tf1.background = [UIImage imageNamed:@"image1"];

//disable状态下显示的图片

tf1.disabledBackground = [UIImage imageNamed:@"image4"];

//设置状态为disable

tf1.enabled = YES;

//开始编辑时清空

tf1.clearsOnBeginEditing = YES;

//当编辑的时候出现删除按钮

tf1.clearButtonMode = UITextFieldViewModeWhileEditing;

tf1.keyboardType = UIKeyboardTypeDefault;

tf1.returnKeyType = UIReturnKeyDefault;

//密文显示风格

tf1.secureTextEntry = NO;

tf1.delegate = self;

NSLog(@"tf1:%@", tf1);

//编辑改变事件

[tf1 addTarget:self action:@selector(onEditChanged:) forControlEvents:UIControlEventEditingChanged];

[self.view addSubview:tf1];

UIButton *btn1 = [self customButton:@"stopEdit" frame:CGRectMake(220, 150, 100, 24) action:@selector(onStopEdit)];

[self.view addSubview:btn1];

UITextField *tf2 = [self customTextField:@"请输入用户名" frame:CGRectMake(10, 200, 180, 24) isSecure:NO];

UIButton *leftBtn = [UIButton buttonWithType:UIButtonTypeContactAdd];

leftBtn.frame = CGRectMake(0, 0, 40, 40);

tf2.leftView = leftBtn;

tf2.leftViewMode = UITextFieldViewModeAlways;

tf2.tag = 11;

[self.view addSubview:tf2];

UITextField *tf3 = [self customTextField:@"请输入密码" frame:CGRectMake(10, 250, 180, 24) isSecure:YES];

tf3.tag = 12;

[self.view addSubview:tf3];

UIButton *registerBtn = [self customButton:@"注册" frame:CGRectMake(10, 280, 80, 24) action:@selector(onRegister:)];

[self.view addSubview:registerBtn];

UIButton *loginBtn = [self customButton:@"登录" frame:CGRectMake(100, 280, 80, 24) action:@selector(onLogin:)];

[self.view addSubview:loginBtn];

[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(onTextChanged:) name:UITextFieldTextDidChangeNotification object:nil];

}

- (void)onEditChanged:(UITextField *)tf

{

NSLog(@"tf:%@", tf.text);

if (tf.text.length > 6) {

tf.text = [tf.text substringWithRange:NSMakeRange(0, 6)];

}

}

- (void)onTextChanged:(NSNotification *)notifier

{

NSLog(@"text changed");

}

- (void)onRegister:(UIButton *)btn

{

UITextField *loginTF = (UITextField *)[self.view viewWithTag:11];

UITextField *passwordTF = (UITextField *)[self.view viewWithTag:12];

Person *p = [[Person alloc]init];

p.username = loginTF.text;

p.password = passwordTF.text;

BOOL flag = NO;

for (Person *per in _personsArray) {

if ([per.username isEqualToString:p.username]) {

flag = YES;

//弹出警示框

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"提示" message:@"用户已经存在" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", @"不确定", nil];

alert.tag = 10;

[alert show];

break; //一旦发现已经注册，则不用继续判断

// UIAlertController

}

}

if (flag == NO) {

[_personsArray addObject:p];

}

}

#pragma mark - alert delegate

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

NSLog(@"index:%ld", buttonIndex);

UITextField *loginTF = (UITextField *)[self.view viewWithTag:11];

if (alertView.tag == 11) {

[loginTF becomeFirstResponder]; //弹出键盘

}

}

- (void)onLogin:(UIButton *)btn

{

UITextField *loginTF = (UITextField *)[self.view viewWithTag:11];

UITextField *passwordTF = (UITextField *)[self.view viewWithTag:12];

[loginTF resignFirstResponder];

[passwordTF resignFirstResponder];

NSString *message;

for (Person *p in _personsArray) {

if ([p.username isEqualToString:loginTF.text]) {

if ([p.password isEqualToString:passwordTF.text]) {

message = @"登录成功";

}else

{

message = @"密码错误";

}

}else{

message = @"用户不存在";

}

}

UIAlertView *loginAlert = [[UIAlertView alloc]initWithTitle:@"提示" message:message delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

loginAlert.tag = 11;

[loginAlert show];

}

- (UITextField *)customTextField:(NSString *)placeholder frame:(CGRect)frame isSecure:(BOOL)secure

{

UITextField *tf = [[UITextField alloc]initWithFrame:frame];

tf.placeholder = placeholder;

tf.borderStyle = UITextBorderStyleRoundedRect;

tf.secureTextEntry = secure;

return tf;

}

#pragma mark - textField delegate

//是否允许编辑, 返回NO则不允许

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField

{

NSLog(@"%s", __func__);

return YES;

}

//已经开始编辑

- (void)textFieldDidBeginEditing:(UITextField *)textField

{

NSLog(@"%s", __func__);

[_imgView stopAnimating];

}

//已经结束编辑

- (void)textFieldDidEndEditing:(UITextField *)textField

{

NSLog(@"didEnd:%@", textField);

NSLog(@"%s", __func__);

}

//是否可以结束编辑，为NO则不可以

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField

{

return YES;

}

//让键盘的return健可以点击

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

[textField resignFirstResponder]; //退出键盘

return YES;

}

- (void)onStopEdit

{

UITextField *tf = [self.view viewWithTag:10];

[tf resignFirstResponder]; //将键盘退出

}

- (void)onClickedStop

{

//停止动画

[_imgView stopAnimating];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

@end