boolean isValid=<EditText Variable>.getText().toString().matches(\\d{2}\\.\\d{2});

或者

EditText text = new EditText(this);
    InputFilter[] filters = new InputFilter[1];
    filters[0] = new InputFilter() {
        public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
            if (end > start) {
                String destTxt = dest.toString();
                String resultingTxt = destTxt.substring(0, dstart) + source.subSequence(start, end) + destTxt.substring(dend);
                if (!resultingTxt.matches("^\\d(\\d(\\.\\d{0,2})?)?")) {
                    return "";
                }
            }
        return null;
        }
    };
    text.setFilters(filters);

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="horizontal" android:layout_width="fill_parent"
    android:layout_height="fill_parent" android:gravity="center_vertical">
    <CheckBox android:id="@+id/checkbox" 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />
    <TextView android:id="@+id/textView" android:layout_alignParentRight="true"
        android:layout_width="wrap_content" android:layout_height="60dp" 
        android:layout_marginLeft="6dp" android:layout_marginRight="6dp"
        android:gravity="center_vertical|right" android:layout_weight="2"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="#2B78E4" />
    <TextView android:id="@+id/txt1"
        android:layout_width="fill_parent" android:layout_height="wrap_content" 
        android:layout_marginLeft="6dp" android:layout_marginTop="6dp"
        android:layout_toRightOf="@id/checkbox" android:layout_toLeftOf="@id/textView"
        android:gravity="center_vertical" android:singleLine="true"
        android:textAppearance="?android:attr/textAppearanceMedium" />
    <TextView android:id="@+id/txt2" android:layout_below="@id/txt1"
        android:layout_width="fill_parent" android:layout_height="wrap_content" 
        android:layout_marginLeft="6dp" android:layout_marginTop="3dp"
        android:layout_toRightOf="@id/checkbox" android:layout_toLeftOf="@id/textView"
        android:gravity="center_vertical" android:singleLine="true" 
        android:textAppearance="?android:attr/textAppearanceSmall" />
</RelativeLayout>

 

for(UIView *view in [self.view subviews])
{
   [view removefromsuperview];
}