ios 360度旋转效果demo ios 360度旋转效果demo
demo功能:用UIimageView实现360度旋转效果。
demo说明:iPhone6.1 测试成功。主要代码在:FVImageSequence.m中。在touchesMoved事件中,通过替换UIimageView的image来产生旋转效果。
demo截屏:
demo主要代码:
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-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[super touchesMoved:touches withEvent:event];
UITouch *touch = [[event allTouches] anyObject];
CGPoint touchLocation = [touch locationInView:self];
int location = touchLocation.x;
//根据移动偏移量,判断旋转的方向。
if(location < previous)
current += increment;
else
current -= increment;
previous = location;
//图片临界点限制,在demo中的image文件夹下有所有图片,是从不同角度拍摄的,将这些图片依次显示就可以实现360的旋转效果
if(current > numberOfImages)
current = 0;
if(current < 0)
current = numberOfImages;
NSString *path = [NSString stringWithFormat:@"%@%d", prefix, current];
NSLog(@"%@", path);
path = [[NSBundle mainBundle] pathForResource:path ofType:extension];
UIImage *img = [[UIImage alloc] initWithContentsOfFile:path];
//设置UIimageView的image为新的image,实现360度旋转效果
[self setImage:img];
[img release];
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