-
使用方法
- 遵守
UIScrollViewDelegate协议 - 实现
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView方法 - 返回要缩放的图片
- minimumZoomScale 最小倍数
- maximumZoomScale 最大倍数
- 需要注意：该方法返回的类型为UIView，故能通过该方法实现所有控件的缩放
- 需要缩放的控件必须是UIScrollView的子控件
- 遵守
- 示例代码如下
@interface ViewController () <UIScrollViewDelegate>
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property (weak, nonatomic) IBOutlet UIImageView *image;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.scrollView.contentSize = self.image.frame.size;
self.scrollView.delegate = self;
self.scrollView.minimumZoomScale = 0.2;
self.scrollView.maximumZoomScale = 2.0;
// NSLog(@"%@",NSStringFromCGPoint(self.scrollView.contentOffset));
}
/**
* ssss
*
* @param sender ffff
*/
- (IBAction)Left:(id)sender {
// self.scrollView.contentOffset = CGPointMake(0, 0);
NSLog(@"%@",NSStringFromCGPoint(self.scrollView.contentOffset));
[UIView animateWithDuration:1 animations:^{
self.scrollView.contentOffset = CGPointMake(0, self.scrollView.contentOffset.y);
} completion:^(BOOL finished){
if(finished)
{
NSLog(@"执行完毕");
}
}];
}
- (IBAction)Top:(id)sender {
// self.scrollView.contentOffset = CGPointMake(self.scrollView.contentOffset.x, 0);
CGPoint offset = CGPointMake(self.scrollView.contentOffset.x, 0);
[self.scrollView setContentOffset:offset animated:YES];
}
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView
{
return self.image;
}
@end
效果图
