[iOS開發] 如何做一個Username/Password彈跳視窗(UIAlertView)?

1. 首先，你要初始化一個UIAlertView物件。然後你必須將message的參數值設為@”\n\n\n”，這是用來多留幾行空白以便擺放輸入框欄位。
2. 建立兩個UITextField物件，將他們加至UIAlertView裡成為subview。別忘了設定輸入框的背景色(setBackgroundColor)、預設文字(setPlaceholder)、安全表示(setSecureTextEntry，輸入文字時會變成星號，用於密碼欄)。
3. 最後，在呈現UIAlertView時，在垂直位移加上一點Shift值並且有需要的話將之設定為FirstResponder。

Source Code:

view sourceprint?

01.UITextField *textField;

02.UITextField *textField2;

03.

04.UIAlertView *prompt = [[UIAlertView alloc] initWithTitle:@"Username and password"

05.message:@"\n\n\n" // IMPORTANT

06.delegate:nil

07.cancelButtonTitle:@"Cancel"

08.otherButtonTitles:@"Enter", nil];

09.

10.textField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 50.0, 260.0, 25.0)];

11.[textField setBackgroundColor:[UIColor whiteColor]];

12.[textField setPlaceholder:@"username"];

13.[prompt addSubview:textField];

14.

15.textField2 = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 85.0, 260.0, 25.0)];

16.[textField2 setBackgroundColor:[UIColor whiteColor]];

17.[textField2 setPlaceholder:@"password"];

18.[textField2 setSecureTextEntry:YES];

19.[prompt addSubview:textField2];

20.

21.// set place

22.[prompt setTransform:CGAffineTransformMakeTranslation(0.0, 110.0)];

23.[prompt show];

24.[prompt release];

25.

26.// set cursor and show keyboard

27.[textField becomeFirstResponder];

Reference:

http://iphone-dev-tips.alterplay.com/2009/12/username-and-password-uitextfields-in.html

http://fstoke.me/blog/?p=2643