Iphone UIAlertView-从通过代码添加的文本字段中检索文本字段值
下面是我创建带有文本框的UIAlertView的代码Iphone UIAlertView-从通过代码添加的文本字段中检索文本字段值,iphone,xcode,Iphone,Xcode,下面是我创建带有文本框的UIAlertView的代码 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Enter A Username Here" message:@"this gets covered!" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTi
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Enter A Username Here" message:@"this gets covered!"
delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:@"OK!", nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
alert.tag = kAlertSaveScore;
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
[myTextField release];
我的问题是,如何从中的文本字段中获取值:
- (void) alertView:(UIAlertView *) actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
}
我知道我可以获得alertview的标准内容,比如actionSheet.tag等等,但是我如何获得上面创建的文本字段呢
@interface MyClass {
UITextField *alertTextField;
}
@end
与其在本地声明,不如使用它
//...
alertTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
//...
- (void) alertView:(UIAlertView *) alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
NSString *text = alertTextField.text;
alertTextField = nil;
}
给它一个标签,然后用标签找到它。因此,使用您的代码:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Enter A Username Here" message:@"this gets covered!"
delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:@"OK!", nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
alert.tag = kAlertSaveScore;
// Give the text field some unique tag
[myTextField setTag:10250];
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
[myTextField release];
然后,在回调中,无论在何处,都不必担心文本字段的内存管理或状态管理:
- (void) alertView:(UIAlertView *) actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
// Get the field you added to the alert view earlier (you should also
// probably validate that this field is there and that it is a UITextField but...)
UITextField* myField = (UITextField*)[actionSheet viewWithTag:10250];
NSLog(@"Entered text: %@", [myField text]);
}