UIActivityIndicatorView的详细使用

网站：

http://www.cnblogs.com/top5/archive/2012/05/17/2506623.html

核心代码：

- (void) enterNickName:(NSString*)msg

{

prompt = [[UIAlertViewalloc] initWithTitle:@"设置昵称"

message:msg

delegate:self

cancelButtonTitle:nil

otherButtonTitles:nil];

UITextField *textField = [[UITextFieldalloc] initWithFrame:CGRectMake(27.0,70.0, 230.0, 30.0)];

[textField setBackgroundColor:[UIColorwhiteColor]];

[textField setPlaceholder:@"输入昵称"];

textField.layer.cornerRadius=6.0;

textField.delegate=self;

textField.contentVerticalAlignment=UIControlContentVerticalAlignmentCenter;

[prompt addSubview:textField];

[textField becomeFirstResponder];

textField.keyboardType=UIKeyboardTypeDefault;

textField.keyboardAppearance=UIKeyboardAppearanceDefault;

textField.returnKeyType=UIReturnKeyDone;

[textField release];

[promptsetTransform:CGAffineTransformMakeTranslation(0.0, -40.0)]; //可以调整弹出框在屏幕上的位置

[prompt show];

}

#pragma textField delegate

- (BOOL)textFieldShouldReturn:(UITextField *)textField

{

NSLog(@"nickname=%@",textField.text);

if (nil==textField.text ||0==[[textField.textstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceCharacterSet]] length])

{

prompt.message=@"\n\n昵称不能为空!";

return YES;

}

if ([[textField.textstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceCharacterSet]] length]<2

||[[textField.textstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceCharacterSet]] length]>15)

{

prompt.message=@"\n\n昵称只支持2-15个字，请重新设置";

return YES;

}

[prompt dismissWithClickedButtonIndex:0animated:NO];//触发dismiss

[prompt release];

}