UITextField

来源：互联网发布：保暖帽知乎编辑：程序博客网时间：2024/04/28 04:45

AppDelegate.h

#import <UIKit/UIKit.h>@interface AppDelegate : UIResponder <UIApplicationDelegate>@property (strong, nonatomic) UIWindow *window;@end

AppDelegate.m

#import "AppDelegate.h"@interface AppDelegate ()@property(nonatomic, retain)UITextField *secondText;@property(nonatomic, retain)UITextField *textField;@end@implementation AppDelegate- (void)dealloc {    [_window release];    [_secondText release];    [_textField release];    [super dealloc];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];    // Override point for customization after application launch.    self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];    [_window release];    self.textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 150, 50)];    self.textField.backgroundColor = [UIColor yellowColor];    [self.window addSubview:self.textField];    [self.textField release];    //  边框    self.textField.layer.borderWidth = 1;    //  弧度    self.textField.layer.cornerRadius = 10;//    textField.text = @"hehehe和";    self.textField.textColor = [UIColor redColor];    self.textField.textAlignment = NSTextAlignmentCenter;    self.textField.font = [UIFont systemFontOfSize:21];//    [textField sizeToFit];//    textField.center = CGPointMake(100, 100);    self.textField.placeholder = @"请输入内容";    //  控制能否使用输入框    self.textField.enabled = YES;    //  密码效果    self.textField.secureTextEntry = NO;    //  键盘类型//    textField.keyboardType = UIKeyboardTypeNumberPad;    //  改变return按钮的样式    self.textField.returnKeyType = UIReturnKeyYahoo;    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 0, 100)];    view.backgroundColor = [UIColor yellowColor];    //  可以通过自定义的视图, 取代键盘//    textField.inputView = view;//    textField.inputAccessoryView = view;    //  清除按钮    self.textField.clearButtonMode = UITextFieldViewModeAlways;    //  给textFlield添加一个事件    [self.textField addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventEditingChanged];    [_textField release];    NSLog(@"%p", self.textField);    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 200, 150, 50)];    label.layer.borderWidth = 1;    label.layer.cornerRadius = 10;    [self.window addSubview:label];    [label release];    label.tag = 1000;    //  控件写成属性, 一定要使用    self.secondText = [[UITextField alloc] initWithFrame:CGRectMake(100, 300, 150, 50)];    self.secondText.backgroundColor = [UIColor cyanColor];    [self.window addSubview:self.secondText];    [self.secondText release];    [self.secondText addTarget:self action:@selector(valueChange:) forControlEvents:UIControlEventEditingChanged];    NSLog(@"%p", self.secondText);    [_secondText release];#warning 在给某些控件绑定方法的时候, 一般会在写方法的时候给同一个类型的参数, 哪个控件去执行方法, 对应的参数就是哪个对象, 省去寻找触发事件的对象的麻烦    return YES;}- (void)valueChange:(UITextField *)textfield {//    NSLog(@"%@", textfield);    //  先通过tag值找到指定的label    UILabel *label = (UILabel *)[self.window viewWithTag:1000];//    label.text = textfield.text;    if ([self.secondText.text isEqualToString:self.textField.text]) {        label.text = @"相同";    } else {        label.text = @"不同";    }}

0 0