iOS 注册或登录页面(UILable,UITextField,UIButton)
注册或登录页面
如下图
1，这里为了展现UITextField的文本框关联键盘的设置，这里把“密码”和“确定密码”的关联键盘都设置为数字键盘，实际应用中密码一般都允许为数字或字母。
2，实现了键盘收回操作。
3，这里没有写对“用户名”进行特殊字符过滤的代码。
实现代码：
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
//三个UILabel
UILabel *nameLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 60, 80, 37)];
nameLabel.font = [UIFont systemFontOfSize:15];
nameLabel.text = @"用 户 名:";
nameLabel.backgroundColor = [UIColor clearColor];
nameLabel.textAlignment = NSTextAlignmentLeft;
nameLabel.numberOfLines = 2; //用于设置UILabel中文本的行数
[self.view addSubview:nameLabel];
[nameLabel release];
UILabel *newPasswordLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 60+40, 80, 37)];
newPasswordLabel.font = [UIFont systemFontOfSize:15];
newPasswordLabel.text = @"密 码：";
newPasswordLabel.backgroundColor = [UIColor clearColor];
newPasswordLabel.textAlignment = NSTextAlignmentLeft;
[self.view addSubview:newPasswordLabel];
[newPasswordLabel release];
UILabel *oncePasswordLabel = [[UILabel alloc]initWithFrame:CGRectMake(10, 60+40*2, 80, 37)];
oncePasswordLabel.font = [UIFont systemFontOfSize:15];
oncePasswordLabel.text = @"确认密码:";
oncePasswordLabel.backgroundColor = [UIColor clearColor];
oncePasswordLabel.textAlignment = NSTextAlignmentLeft;
[self.view addSubview:oncePasswordLabel];
[oncePasswordLabel release];
//三个输入框
UITextField *nameTextField = [[UITextField alloc]initWithFrame:CGRectMake(90, 60, 210, 30)];
nameTextField.placeholder = @"请输入用户名";
nameTextField.tag = 1;
[nameTextField setSecureTextEntry:NO];
nameTextField.font = [UIFont systemFontOfSize:14];
nameTextField.delegate = self;
nameTextField.backgroundColor = [UIColor clearColor];
nameTextField.borderStyle = UITextBorderStyleRoundedRect;
[self.view addSubview:nameTextField];
[nameTextField release];
UITextField *passwordTextField = [[UITextField alloc]initWithFrame:CGRectMake(90, 60+40, 210, 30)];
passwordTextField.placeholder = @"至少6位数字";
passwordTextField.tag = 2;
[passwordTextField setSecureTextEntry:YES];
passwordTextField.font = [UIFont systemFontOfSize:14];
passwordTextField.delegate = self;
passwordTextField.backgroundColor = [UIColor clearColor];
passwordTextField.borderStyle = UITextBorderStyleRoundedRect;
passwordTextField.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:passwordTextField];
[passwordTextField release];
UITextField *onceNewPasswordTextField = [[UITextField alloc]initWithFrame:CGRectMake(90, 60+40*2, 210, 30)];
onceNewPasswordTextField.placeholder = @"请再次输入密码";
onceNewPasswordTextField.tag = 3;
onceNewPasswordTextField.font = [UIFont systemFontOfSize:14];
[onceNewPasswordTextField setSecureTextEntry:YES];
onceNewPasswordTextField.delegate = self;
onceNewPasswordTextField.backgroundColor = [UIColor clearColor];
onceNewPasswordTextField.borderStyle = UITextBorderStyleRoundedRect;
onceNewPasswordTextField.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:onceNewPasswordTextField];
[onceNewPasswordTextField release];
UIButton *confirmButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
confirmButton.frame = CGRectMake(110, 60+40*3+20, 100, 37);
[confirmButton setTitle:@"确定" forState:UIControlStateNormal]; //正常状况下button显示的标题
[confirmButton setTitle:@"确定" forState:UIControlStateHighlighted]; //高亮显示时button的标题
confirmButton.backgroundColor = [UIColor redColor];
[confirmButton addTarget:self action:@selector(confirm:) forControlEvents:UIControlEventTouchUpInside];//button被按下又抬起后发生的事件
//@selector可以理解为"选择子"，selector是一个指针变量，类似于sender。 这里是将method的方法指定给新建的这个confirmButton
[self.view addSubview:confirmButton];
}
//收回键盘
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
for (int i = 0; i<4; i++) {
UITextField *textField = (UITextField*)[self.view viewWithTag:1+i];
[textField resignFirstResponder];
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@endUILabel
UILabel继承了UIView，它可以设置UIView所支持的属性。
UILabel *label1 = [[UILabel alloc]initWithFrame:CGRectMake(50.0, 20.0, 200.0, 50.0)]; //设置Label的位置和大小
//设置显示文字
label1.text = @"用户名";
//设置字体:粗体，正常的是 SystemFontOfSize
label1.font = [UIFont boldSystemFontOfSize:20];
//设置文字颜色
label1.textColor = [UIColor orangeColor];
//设置文字位置
label1.textAlignment = UITextAlignmentRight;
label2.textAlignment = UITextAlignmentCenter;
//设置字体大小适应label宽度
label4.adjustsFontSizeToFitWidth = YES;
//设置label的行数
label5.numberOfLines = 2;
UIlabel.backgroudColor=[UIColor clearColor]; //可以去掉背景色
//设置高亮
label6.highlighted = YES;
label6.highlightedTextColor = [UIColor orangeColor];
//设置阴影
label7.shadowColor = [UIColor redColor];
label7.shadowOffset = CGSizeMake(1.0,1.0);
//设置是否能与用户进行交互
label7.userInteractionEnabled = YES;
//设置label中的文字是否可变，默认值是YES
label3.enabled = NO;
//设置文字过长时的显示格式
label3.lineBreakMode = UILineBreakModeMiddleTruncation;//截去中间
// typedef enum {
// UILineBreakModeWordWrap = 0,
// UILineBreakModeCharacterWrap,
// UILineBreakModeClip,//截去多余部分
// UILineBreakModeHeadTruncation,//截去头部
// UILineBreakModeTailTruncation,//截去尾部
// UILineBreakModeMiddleTruncation,//截去中间
// } UILineBreakMode;
//如果adjustsFontSizeToFitWidth属性设置为YES，这个属性就来控制文本基线的行为
label4.baselineAdjustment = UIBaselineAdjustmentNone;
// typedef enum {
// UIBaselineAdjustmentAlignBaselines,
// UIBaselineAdjustmentAlignCenters,
// UIBaselineAdjustmentNone,
// } UIBaselineAdjustment;有时需要设置UILabel中文本的行数，其属性值默认为1，用于设置该UILabel只能显示一行文本。
oldPasswordLabel.numberOfLines = 2;UITextField
//初始化textfield并设置位置及大小
UITextField *text = [[UITextField alloc]initWithFrame:CGRectMake(20, 20, 130, 30)];
//当输入框没有内容时，水印提示 ，提示内容为“用户名”
//显示灰色字体，作为提示信息
text.placeholder = @"用户名";
//设置边框样式，只有设置了才会显示边框样式
text.borderStyle = UITextBorderStyleRoundedRect;
typedef enum {
UITextBorderStyleNone,
UITextBorderStyleLine,
UITextBorderStyleBezel,
UITextBorderStyleRoundedRect
} UITextBorderStyle;
//设置键盘的样式
text.keyboardType = UIKeyboardTypeNumberPad;
typedef enum {
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,
} UIKeyboardType;
//每输入一个字符就变成点 用语密码输入
text.secureTextEntry = YES;
//设置输入框的背景颜色，此时设置为白色 如果使用了自定义的背景图片边框会被忽略掉
text.backgroundColor = [UIColor whiteColor];
//设置背景图片
text.background = [UIImage imageNamed:@"dd.png"];
//设置背景
text.disabledBackground = [UIImage imageNamed:@"cc.png"];
//设置输入框内容的字体样式和大小
text.font = [UIFont fontWithName:@"Arial" size:20.0f];
//设置字体颜色
text.textColor = [UIColor redColor];
//输入框中是否有个叉号，在什么时候显示，用于一次性删除输入框中的内容
text.clearButtonMode = UITextFieldViewModeAlways;
typedef enum {
UITextFieldViewModeNever, //从不出现
UITextFieldViewModeWhileEditing, //编辑时出现
UITextFieldViewModeUnlessEditing, //除了编辑外都出现
UITextFieldViewModeAlways //一直出现
} UITextFieldViewMode;
//输入框中一开始就有的文字
text.text = @"一开始就在输入框的文字";
//是否纠错
text.autocorrectionType = UITextAutocorrectionTypeNo;
typedef enum {
UITextAutocorrectionTypeDefault, //默认
UITextAutocorrectionTypeNo, //不自动纠错
UITextAutocorrectionTypeYes, //自动纠错
} UITextAutocorrectionType;
//再次编辑就清空
text.clearsOnBeginEditing = YES;
//内容对齐方式
text.textAlignment = UITextAlignmentLeft;
//内容的垂直对齐方式 UITextField继承自UIControl,此类中有一个属性contentVerticalAlignment
text.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
//设置为YES时文本会自动缩小以适应文本窗口大小.默认是保持原来大小,而让长文本滚动
textFied.adjustsFontSizeToFitWidth = YES;
//设置自动缩小显示的最小字体大小
text.minimumFontSize = 20;
//首字母是否大写
text.autocapitalizationType = UITextAutocapitalizationTypeNone;
typedef enum {
UITextAutocapitalizationTypeNone, 不自动大写
UITextAutocapitalizationTypeWords, 单词首字母大写
UITextAutocapitalizationTypeSentences, 句子的首字母大写
UITextAutocapitalizationTypeAllCharacters, 所有字母都大写
} UITextAutocapitalizationType;
//return键变成什么键
text.returnKeyType =UIReturnKeyDone;
typedef enum {
UIReturnKeyDefault, //默认 灰色按钮，标有Return
UIReturnKeyGo, //标有Go的蓝色按钮
UIReturnKeyGoogle, //标有Google的蓝色按钮，用语搜索
UIReturnKeyJoin, //标有Join的蓝色按钮
UIReturnKeyNext, //标有Next的蓝色按钮
UIReturnKeyRoute, //标有Route的蓝色按钮
UIReturnKeySearch, //标有Search的蓝色按钮
UIReturnKeySend, //标有Send的蓝色按钮
UIReturnKeyYahoo, //标有Yahoo的蓝色按钮
UIReturnKeyYahoo, //标有Yahoo的蓝色按钮
UIReturnKeyEmergencyCall, //紧急呼叫按钮
} UIReturnKeyType;
//键盘外观
textView.keyboardAppearance=UIKeyboardAppearanceDefault；
typedef enum {
UIKeyboardAppearanceDefault， //默认外观，浅灰色
UIKeyboardAppearanceAlert， //深灰 石墨色
} UIReturnKeyType;
//设置代理 用于实现协议
text.delegate = self;
//把textfield加到视图中
[self.window addSubview:text];
//最右侧加图片是以下代码 左侧类似
UIImageView *image=[[UIImageView alloc] initWithImage:[UIImage imageNamed:@"right.png"]];
text.rightView=image;
text.rightViewMode = UITextFieldViewModeAlways;
typedef enum {
UITextFieldViewModeNever,
UITextFieldViewModeWhileEditing,
UITextFieldViewModeUnlessEditing,
UITextFieldViewModeAlways
} UITextFieldViewMode;在处理密码等隐私类的信息时，可能需要将输入的信息隐藏一下。
//每输入一个字符就变成点 ,用语密码输入
[passwordTextField setSecureTextEntry:YES];也可以设置文本框关联的键盘，如下：
//设置键盘的样式
text.keyboardType = UIKeyboardTypeNumberPad;
typedef enum {
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,
} UIKeyboardType;有时需要限制输入文本的长度，这类操作也非常普遍和重要。
//限制输入文本的长度
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
if ([textField.text length] > MAXLENGTH)
{
textField.text = [textField.text substringToIndex:MAXLENGTH-1];
return NO;
}
return YES;
}UIButton
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
// 能够定义的button类型有以下6种，
// typedef enum {
// UIButtonTypeCustom = 0, 自定义风格
// UIButtonTypeRoundedRect, 圆角矩形
// UIButtonTypeDetailDisclosure, 蓝色小箭头按钮，主要做详细说明用
// UIButtonTypeInfoLight, 亮色感叹号
// UIButtonTypeInfoDark, 暗色感叹号
// UIButtonTypeContactAdd, 十字加号按钮
// } UIButtonType;
//给定button在view上的位置
button1.frame = CGRectMake(20, 20, 280, 20);
//button背景色
button1.backgroundColor = [UIColor clearColor];
//设置button填充图片
//[button1 setImage:[UIImage imageNamed:@"btng.png"] forState:UIControlStateNormal];
//设置button标题
[button1 setTitle:@"点击" forState:UIControlStateNormal];
/* forState: 这个参数的作用是定义按钮的文字或图片在何种状态下才会显现*/
//以下是几种状态
// enum {
// UIControlStateNormal = 0, 常规状态显现
// UIControlStateHighlighted = 1 << 0, 高亮状态显现
// UIControlStateDisabled = 1 << 1, 禁用的状态才会显现
// UIControlStateSelected = 1 << 2, 选中状态
// UIControlStateApplication = 0x00FF0000, 当应用程序标志时
// UIControlStateReserved = 0xFF000000 为内部框架预留，可以不管他
// };
/*
* 默认情况下，当按钮高亮的情况下，图像的颜色会被画深一点，如果这下面的这个属性设置为no，
* 那么可以去掉这个功能
*/
button1.adjustsImageWhenHighlighted = NO;
/*跟上面的情况一样，默认情况下，当按钮禁用的时候，图像会被画得深一点，设置NO可以取消设置*/
button1.adjustsImageWhenDisabled = NO;
/* 下面的这个属性设置为yes的状态下，按钮按下会发光*/
button1.showsTouchWhenHighlighted = YES;
/* 给button添加事件，事件有很多种，我会单独开一篇博文介绍它们，下面这个时间的意思是
按下按钮，并且手指离开屏幕的时候触发这个事件，跟web中的click事件一样。
触发了这个事件以后，执行butClick:这个方法，addTarget:self 的意思是说，这个方法在本类中
也可以传入其他类的指针*/
[button1 addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
//显示控件
[self.view addSubview:button1];单独说明一下：
UIButton *confirmButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
confirmButton.frame = CGRectMake(110, 60+40*3+20, 100, 37);
[confirmButton setTitle:@"确定" forState:UIControlStateNormal]; //正常状况下button显示的标题
[confirmButton setTitle:@"确定" forState:UIControlStateHighlighted]; //高亮显示时button的标题
confirmButton.backgroundColor = [UIColor redColor];
[confirmButton addTarget:self action:@selector(confirm:) forControlEvents:UIControlEventTouchUpInside];//button被按下又抬起后发生的事件
//@selector可以理解为"选择子"，selector是一个指针变量，类似于sender。 这里是将method的方法指定给新建的这个confirmButton
[self.view addSubview:confirmButton];若要设置UIButton的背景图片时：
UIButton *confirmButton = [UIButton buttonWithType:UIButtonTypeCustom];
confirmButton.frame = CGRectMake(10, 60, 100, 40);
UIImage *nextStepImage = [UIImage imageNamed:@"app.png"];
UIImage *nextStepDownImage = [UIImage imageNamed:@"app.png"];
nextStepImage = [nextStepImage resizableImageWithCapInsets:UIEdgeInsetsMake(8, 8, 8, 8)];
nextStepDownImage = [nextStepDownImage resizableImageWithCapInsets:UIEdgeInsetsMake(8, 8, 8, 8)];
[confirmButton setBackgroundImage:nextStepImage forState:UIControlStateNormal];
[confirmButton setBackgroundImage:nextStepDownImage forState:UIControlStateHighlighted];
[confirmButton setTitle:@"确定" forState:UIControlStateNormal];
[confirmButton addTarget:self action:@selector(confirm:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:confirmButton];