6.UIAlertView的基本使用

1.输入文字的alertView

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"修改数据" message:nil delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

alert.alertViewStyle = UIAlertViewStylePlainTextInput;

UITextField *textField =  [alert textFieldAtIndex:0];

//textField.text =hero.name;

textField.placeholder=hero.name;

[alert show];

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

UITextField *textField =  [alertView textFieldAtIndex:0];

NSString *newStr = textField.text;

}