定义一个UIScrollview后往里面添加多张图片使其滑动显示,可以这么写:
IBOutlet UIScrollview *parkScrollView;
- parkScrollView.contentSize=CGSizeMake(1024*3, 768);
- for (int i=0; i<4; i++) {
- NSString *imgName=[[NSString alloc]initWithFormat:@"m_side0_%d",i];
- UIImage *img1=[[UIImage alloc]initWithContentsOfFile:[[NSBundle mainBundle]pathForResource:imgName ofType:@"png"]];
- UIImageView *imgView1=[[UIImageView alloc]initWithFrame:CGRectMake(1024*i, 0, 1024, 768)];
- [imgView1 setImage:img1];
- [parkScrollView addSubview:imgView1];
- [imgName release];
- [img1 release];
- [imgView1 release];
- }
这么写确实达到效果了,但是,每当执行这段代码时,scrollview里面就会add几个ImageView,它是一直占用着系统内存.
有一个解决办法是,得到里面的ImageView,分别把他们remove掉,再执行添加操作.
- int l=[parkScrollView.subviews count];
- UIView *subview;
- while (l>0) {
- subview=[parkScrollView.subviews objectAtIndex:0];
- [subview removeFromSuperview];
- l=[parkScrollView.subviews count];
- }