In case anybody is interested, the following wrapper for NSTimer solves the
problem. (You can add the other methods yourself, if needed.)
#import <Foundation/Foundation.h>
@interface RTPTimer : NSObject
@property(nonatomic, weak) id target;
@property(nonatomic) SEL sel;
+ (RTPTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds
target:(id)target selector:(SEL)aSelector userInfo:(id)userInfo
repeats:(BOOL)repeats;
- (void)invalidate;
- (BOOL)isValid;
- (NSTimeInterval)timeInterval;
- (id)userInfo;
@end
#import "RTPTimer.h"
@interface RTPTimer ()
@property(nonatomic, strong) NSTimer *timer;
@end
@implementation RTPTimer
#pragma mark - Lifecycle
+ (RTPTimer *)scheduledTimerWithTimeInterval:(NSTimeInterval)seconds
target:(id)target
selector:(SEL)aSelector
userInfo:(id)userInfo
repeats:(BOOL)repeats {
RTPTimer *ourTimer = [[RTPTimer alloc] init];
ourTimer.sel = aSelector;
ourTimer.target = target;
ourTimer.timer = [NSTimer scheduledTimerWithTimeInterval:seconds
target:ourTimer
selector:@selector(executeSelector:)
userInfo:userInfo
repeats:repeats];
return ourTimer;
}
- (void)dealloc {
if(self.timer != nil) {
[self.timer invalidate];
self.timer = nil;
}
}
#pragma mark - Access
- (void)invalidate {
[self.timer invalidate];
self.timer = nil;
}
- (BOOL)isValid {
return [self.timer isValid];
}
- (NSTimeInterval)timeInterval {
return [self.timer timeInterval];
}
- (id)userInfo {
return [self.timer userInfo];
}
#pragma mark - Internal
- (void) executeSelector:(NSTimer*)timer {
if(self.target != nil) {
if([self.target respondsToSelector:self.sel]) // Needed?
[self.target performSelector:self.sel withObject:self];
}
else
[self invalidate];
}
@end
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