UITextField的简单使用

关于UITextField的简单实用和注释
 
 1 - (void)viewDidLoad {
    [super viewDidLoad];
    
//    self.view.backgroundColor = [UIColor grayColor];
    
    //输入框默认为全透明
    //不管frame多大，默认输入框高度为30
    UITextField *textfield1 = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 200, 30)];
    //设置边框类型，默认为无边框
    textfield1.borderStyle = UITextBorderStyleLine;
    //设置背景颜色，默认为透明色
    textfield1.backgroundColor = [UIColor orangeColor];
    
    [self.view addSubview:textfield1];

    
    //设置居中
    textfield1.textAlignment = NSTextAlignmentCenter;
    //设置密码显示形式
//    textfield1.secureTextEntry = YES;
    
    //设置键盘类型
    textfield1.keyboardType = UIKeyboardTypeEmailAddress;
    
    //设置清除按钮合适显示
    textfield1.clearButtonMode = UITextFieldViewModeWhileEditing;
    
    //关闭首字母大写
    textfield1.autocapitalizationType = UITextAutocapitalizationTypeNone;
    //输入框为空时的提示文字
    textfield1.placeholder = @"请输入您的帐号";
    
    textfield1.text = @"hahha";
    //设置文本字体
    textfield1.font = [UIFont systemFontOfSize:11];
    //设置代理
    textfield1.delegate = self;
//    self.ibTextField.delegate = self;
    
    textfield1.tag = 100;
//    self.ibTextField.tag = 200;
    /*
     使用代理方法：
     1.遵从协议
     2.设置代理
     3.实现协议方法
     
     */
    
    
}

#define mark  textFeildDelegate
//开始编辑
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
    
    NSLog(@"j将要开始编辑,%ld",textField.tag);
    //决定你的textField是否可以编辑
    return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
    NSLog(@"开始编辑");

}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{
    
    NSLog(@"将要结束编辑");
    return YES;
    
}

- (void)textFieldDidEndEditing:(UITextField *)textField{
    
    NSLog(@"结束编辑");
}
//点击清除按钮的时候调用
- (BOOL)textFieldShouldClear:(UITextField *)textField{
    NSLog(@"clear");
    return YES;
}
//点击键盘return时调用
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
    NSLog(@"return");
    //取消第一响应者，收起键盘
    [textField resignFirstResponder];
    return YES;
}