ARC и свойства

 self.path = @"init";
 [NSThread detachNewThreadSelector:@selector(thread1:) toTarget:self withObject:nil];    
 [NSThread detachNewThreadSelector:@selector(thread2:) toTarget:self withObject:nil]; 
 
 
-(void) thread2:(id)anObject{
    
    NSLog(@"%@", self.path); //всё равно выдает "thread1String"
 
[NSThread exit];
}
 
 
 
-(void) thread1:(id)anObject{
 
    self.path = @"thread1String";
[NSThread exit];
}

- (void)doMagic {
    [NSThread detachNewThreadSelector:@selector(stringWriter) toTarget:self withObject:nil];//запускаем метод в другом потоке
}
 
- (void)stringWriter {
    NSTimer *timer = [NSTimer timerWithTimeInterval:0.01 target:self selector:@selector(readString) userInfo:nil repeats:YES]; //вызов "someMethod"а будет происходить с интервалом 0.01 секунды.
    [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];// добавляем таймер в текуший runLoop
}

- (void)loadView {
    
     
    [NSThread detachNewThreadSelector:@selector(stringReader) toTarget:self withObject:nil];
    [NSThread detachNewThreadSelector:@selector(stringWriter) toTarget:self withObject:nil];
 
     }
 
 
- (void)stringWriter {
    
 
    NSTimer *timer = [NSTimer timerWithTimeInterval:0.01 target:self selector:@selector(writeString) userInfo:nil repeats:YES]; 
      [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];
}
 
 
- (void)stringReader {
   
 
    NSTimer *timer = [NSTimer timerWithTimeInterval:0.01 target:self selector:@selector(readString) userInfo:nil repeats:YES]; 
    [[NSRunLoop mainRunLoop] addTimer:timer forMode:NSRunLoopCommonModes];    
}
 
 
 
- (void)writeString {
 
    self.filePath = @"newString";
}
 
 
- (void)readString {
    
    NSLog(@"%@",self.filePath);
    
}