Iphone 如何停止在objective c中移动图像？

我已经做了编码来检查图像是否穿过了特定区域

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

CGPoint loc=[touch locationInView:self.view];

if (touch.view==img2Obj) {
    NSLog(@"image2");
    img2Obj.center=loc;

    currentx1=img2Obj.frame.origin.x;
    currenty1=img2Obj.frame.origin.y;
    //NSLog(@"top left corner x and y is %.1f and %.1f",img2Obj.frame.origin.x,img2Obj.frame.origin.y);
    [self isImg1InPos];

}}
-(void)isImg1InPos {

int dx,dy;

dx=currentx1-x1;
dy=currenty1-y1;
if (abs(dx)<5 && abs(dx)<5) {
    NSLog(@"Image must stop moving after this!!!");
    [img2Obj setUserInteractionEnabled:FALSE];
}
//NSLog(@"unsigned int is %d",abs(dx));

}

但是它不起作用，有人能告诉我如何解决这个问题吗

---

提前非常感谢

只需保留一个单独的

BOOL

值，称为

movingabled

，并根据此标志值提前退出

touchesMoved

例程（即在调整图像位置之前）。

是否满足条件？也就是说，NSLog是否打印该语句？@Aadhira Ya条件满足，但图像仍在移动

[img2Obj setUserInteractionEnabled:FALSE];