自动消失的UIAlert
#import <UIKit/UIKit.h>
@interface ActivityIndicatorAlertView : UIAlertView
@property (nonatomic, retain) UIActivityIndicatorView *activityIndicator;
@property (nonatomic, assign) BOOL showActivityIndicator;
- (void) stopActivityIndicator;
+ (void) alertViewAutoDismiss:(float) time title:(NSString *) title msg:(NSString *) message showActivityIndicator:(BOOL) showIndicator;
@end
#import "ActivityIndicatorAlertView.h"
#define UIAlertViewHeight 10
@implementation ActivityIndicatorAlertView
@synthesize activityIndicator, showActivityIndicator;
- (void) dealloc {
[activityIndicator release];
[super dealloc];
}
- (void)drawRect:(CGRect)rect
{
if (showActivityIndicator)
{
[self setFrame:CGRectMake(self.frame.origin.x, self.frame.origin.y-UIAlertViewHeight/2, self.frame.size.width, self.frame.size.height+UIAlertViewHeight)];
UIView *lowestView;
for (int i = 0; i < [self.subviews count]; i++)
{
if (![[self.subviews objectAtIndex:i] isKindOfClass:[UIControl class]])
{
lowestView = [self.subviews objectAtIndex:i];
}
}
activityIndicator.center = CGPointMake(rect.size.width/2, rect.size.height/2 + 10);
[activityIndicator startAnimating];
for (UIView *sv in self.subviews)
{
if ([sv isKindOfClass:[UIControl class]])
{
sv.frame = CGRectMake(sv.frame.origin.x, sv.frame.origin.y + UIAlertViewHeight, sv.frame.size.width, sv.frame.size.height);
}
}
} else
{
[super drawRect:rect];
}
}
- (void) stopActivityIndicator
{
if (activityIndicator)
{
[activityIndicator stopAnimating];
}
}
- (void) dismissWithClickedButtonIndex:(NSInteger)buttonIndex animated:(BOOL)animated
{
if (activityIndicator)
{
[activityIndicator stopAnimating];
}
[super dismissWithClickedButtonIndex:buttonIndex animated:animated];
}
- (void)show
{
[self prepare];
[super show];
}
- (void)prepare
{
if (showActivityIndicator)
{
if (!self.activityIndicator)
{
self.activityIndicator = [[[UIActivityIndicatorView alloc]initWithFrame:CGRectMake(0, 0, 80, 80)] autorelease];
[self insertSubview:activityIndicator atIndex:0];
}
}
[self setNeedsDisplay];
}
+ (void) alertViewAutoDismiss:(float) time title:(NSString *) title msg:(NSString *) message showActivityIndicator:(BOOL) showIndicator
{
ActivityIndicatorAlertView *alert = [[super alloc] initWithTitle:@""
message:message
delegate:nil
cancelButtonTitle:nil
otherButtonTitles:nil];
alert.showActivityIndicator = showIndicator;
[alert show];
[NSTimer scheduledTimerWithTimeInterval:time
target:self
selector:@selector(dismissAlert:)
userInfo:[NSDictionary dictionaryWithObjectsAndKeys:alert, @"alert", nil]
repeats:NO];
NSLog(@"release alert");
[alert release];
}
+(void) dismissAlert:(NSTimer *)timer
{
UIAlertView *alert = [[timer userInfo] objectForKey:@"alert"];
[alert dismissWithClickedButtonIndex:0 animated:YES];
}
@end