IOS开发－UI学习－UITextField的具体属性及用法

直接上代码，里面有各种属性的用法注释，至于每个属性有多个可以设置的值，每个值的效果如何，可以通过查看这个函数参数的枚举量，并逐一测试。

 //制作登陆界面
 #import "ViewController.h"

 @interface ViewController (){

 //定义全局变量（控件）
     UITextField *username;
     UITextField *password;
     UIButton *resignbutton;
     UIButton *loginbutton;
     int i;
     NSMutableArray *imagearray;
     UIImageView *nameImage;
 }
 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

 //    获取屏幕分辨率
     CGRect rect = [[UIScreen mainScreen]bounds];
     CGFloat screenw = rect.size.width;
     CGFloat screenh = rect.size.height;

 //    初始化密码掩码标志位
     i=;

 // 用户名输入框
 //    创建
     username = [[UITextField alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
 //    设置边框
     [username setBorderStyle:UITextBorderStyleRoundedRect];
 //    设置水印提示
     username.placeholder = @"请输入用户名：";
 //    设置自动联想输入
     username.autocorrectionType = UITextAutocorrectionTypeYes;
 //    自动联想输入方式设置为根据单词首字母联想
     username.autocapitalizationType = UITextAutocapitalizationTypeWords;
 //    键盘右下角按键的类型
     username.returnKeyType = UIReturnKeyDone;
 //    右侧图片设置
 //  nameImage.image = [UIImage imageNamed:@"cat_eat0000.jpg"];
 //    设置代理
     username.delegate = self;
 //    设置右侧清除按钮模式
     username.clearButtonMode = UITextFieldViewModeWhileEditing;
 //    初始化动画素材存放数组
     imagearray = [[NSMutableArray alloc]initWithCapacity:];
 //    通过循环为数组装载图片
     for (int x=; x<; x++) {
         [imagearray addObject:[UIImage imageNamed:[NSString stringWithFormat:@"cat_eat00%.2d.jpg",x]]];
     }
 //    初始化图片位置，大小，由于图片限制在输入框右侧，所用坐标设置为0
     nameImage = [[UIImageView alloc]initWithFrame:CGRectMake(, ,   , )];
 //    设置输入框右侧动画图片来源为图片数组
     nameImage.animationImages = imagearray;
 //    设置动画播放持续时长
     nameImage.animationDuration = ;
 //    设置动画重复次数为无限循环
     nameImage.animationRepeatCount = ;

 //    设置输入框右侧图片
     username.rightView = nameImage;
 //    设置右侧图片模式
     password.rightViewMode = UITextFieldViewModeWhileEditing;
 //    在启动程序后获取焦点
     [username becomeFirstResponder];
 //    加载到View上
     [self.view addSubview:username];

 //    密码输入框
     password = [[UITextField alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
     [password setBorderStyle:UITextBorderStyleRoundedRect];
 //    设置输入提示水印文字
     password.placeholder = [NSString stringWithFormat:@"请输入密码："];
 //    设置输入掩码
     password.secureTextEntry = YES;
     username.returnKeyType = UIReturnKeyDone;
 //    设置字体和字号
     password.font = [UIFont fontWithName:@"Arial" size:];

     UIImageView *rightImage = [[UIImageView alloc]initWithFrame:CGRectMake(, , , )];
     rightImage.image = [UIImage imageNamed:@""];
     password.rightView = rightImage;
     password.rightViewMode = UITextFieldViewModeWhileEditing;
     [self.view addSubview:password];

 //    设置密码输入框密码掩码开关的按钮
     UIButton *eyebutton = [[UIButton alloc]initWithFrame:CGRectMake(*screenw/-*screenw/, *screenh/+, *screenw/, screenh/)];
     eyebutton.backgroundColor = [UIColor whiteColor];
 //    eyebutton.alpha = 0;
         eyebutton.alpha = 0.1;

     [eyebutton addTarget:self action:@selector(haha:) forControlEvents:UIControlEventTouchUpInside];
     [self.view addSubview:eyebutton];

 //    注册按钮
     resignbutton = [[UIButton alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
     [resignbutton setTitle:@"注册" forState:UIControlStateNormal];
     resignbutton.backgroundColor = [UIColor colorWithRed:0.461 green:1.000 blue:0.856 alpha:1.000];
     [self.view addSubview:resignbutton];

 //    登陆按钮
     loginbutton = [[UIButton alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
     [loginbutton setTitle:@"登陆" forState:UIControlStateNormal];
     loginbutton.backgroundColor = [UIColor colorWithRed:0.461 green:1.000 blue:0.856 alpha:1.000];
     [self.view addSubview:loginbutton];

 //    用户名提示
     UILabel *usernamelabel =[[UILabel alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
     usernamelabel.text = @"用户名：";
     [self.view addSubview:usernamelabel];

 //    密码输入提示
     UILabel *passwordlabel =[[UILabel alloc]initWithFrame:CGRectMake(*screenw/, *screenh/, *screenw/, screenh/)];
     passwordlabel.text = @"密码：";
     [self.view addSubview:passwordlabel];
 }

 //UiTextField代理事件
 - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
     [nameImage startAnimating];
     return YES;
 }

 //设置密码输入框密码掩码开关的按钮响应事件
 -(void)haha:(id)sender{
     i++;
     if (i%==) {
         password.secureTextEntry = NO;
     }if (i%==) {
         password.secureTextEntry = YES;
     }

 }

 //输入完后点击输入框空白处让键盘消失
 -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
     [username resignFirstResponder];
     [password resignFirstResponder];
 }

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

 @end

具体效果如下：