将图片以动态方式加载到tableviewcell中

- (UIImage *)imageForMagnitude:(CGFloat)magnitude { 
if (magnitude >= 5.0) {
    return [UIImage imageNamed:@\"5.0.png\"];
}
if (magnitude >= 4.0) {
    return [UIImage imageNamed:@\"4.0.png\"];
}
if (magnitude >= 3.0) {
    return [UIImage imageNamed:@\"3.0.png\"];
}
if (magnitude >= 2.0) {
    return [UIImage imageNamed:@\"2.0.png\"];
}
return nil;

<math.h>

floorf

MIN

MAX

int realMagnitude = (int) MAX(MIN(floorf(magnitude), 5.0f), 2.0f);
return [UIImage imageNamed:[NSString stringWithFormat:@\"%d.0.png\", realMagnitude]];

-tableView:cellForRowAtIndexPath:

NSIndexPath

cell.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:@\"%d.jpg\", indexPath.row]];

[NSString stringWithFormat:@\"%d.0.png\", newMagnitude];