Is it possible to progra开发者_如何学编程m multiple UIAlertViews for one IBAction in Xcode to show at random. For example: I am making an app with multiple questions shown at random, when the submit button is pressed, an alert is shown saying if the answer is correct or not. I want there to be different messages for the alert such as one time it shows one message, then the next time it shows a different message at random. How would I program this?
In your .h:
@interface MyViewController : UIViewController {
NSArray *messages;
}
@property (nonatomic, retain) NSArray *messages;
In your .m
@implementation MyViewController
@synthesize messages;
- (dealloc) {
[messages release];
}
- (void)viewDidLoad {
messages = [[NSArray alloc] initWithObjects:@"Funny Message", @"Even Funnier Message", @"Hilarious message", @"ROFL", @"OK this is getting boring...", nil];
}
When you need an alert:
NSUInteger messageCount = [messages count];
int randomMessageIndex = arc4random() % messageCount;
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Title" message:[messages objectAtIndex:randomMessageIndex] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
[alert release];
define the following macro for the project:
for the msg section as try a Array with random Index
#define KAlert(TITLE,MSG) [[[[UIAlertView alloc] initWithTitle:(TITLE)
message:(MSG)
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil] autorelease] show]
Which could be used as simple call:
KAlert(@"Title", @"Message");
or KAlert(@"Title",@"[youarray objectatindex:randindex]");
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