我使用UIAlertViewStylePlainTextInput
樣式顯示UIAlertView
樣式。然後我嘗試驗證的空場是這樣的:uialertview中的textfield驗證
-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (buttonIndex == 1) {
if ([[alertView textFieldAtIndex:0].text length] > 0 ||
[alertView textFieldAtIndex:0].text != nil ||
[[alertView textFieldAtIndex:0].text isEqual:@""] == FALSE)
{
NSLog(@"error");
}
else
{
[self postToServer];
}
} else {
//close alertview
}
}
但它爲我的錯誤消息日誌即使文本字段不爲空。
修改此語句[alertView textFieldAtIndex:0] .text length]> 0 as [alertView textFieldAtIndex:0] .text length] == 0 – Sumanth