UIScrollView的contentOffset

Question

我怎样才能获得contentOffset的x位置？

这是我的代码,但在日志中总是抛出0

- (void)adjustAreaScroll:(NSNotification *)notification
{
    int value = [[notification object] intValue];
    NSLog(@"adjustAreaScroll, %i", value);

    switch (value) {
        case 0:
            [topScroll setContentOffset:CGPointMake(0, 0)];
            break;
        case 1:
            [topScroll setContentOffset:CGPointMake(1024, 0)];
            break;
        case 2:
            [topScroll setContentOffset:CGPointMake(2048, 0)];
            break;
        case 3:
            [topScroll setContentOffset:CGPointMake(3072, 0)];
            break;
    }
    NSLog(@"target position -----> %i", self.topScroll.contentOffset.x);
}

Answer 1

CGPointMake返回一个CGPoint,它由CGFloats组成.将%i设为%f.