UIScrollView的常见属性

1.CGPoint contentOffset：用来表示UIScrollView滚动的位置

2.CGSize contentSize：用来表示UIScrollView内容的尺寸，滚动范围

3.UIEdgeInsets contentInset：能够在UIScrollView的4周增加额外的滚动区域

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIScrollView *scrollView;
@property (weak, nonatomic) IBOutlet UIImageView *mView;

- (IBAction)scroll;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

     self.scrollView.contentSize = self.mView.frame.size; // 总体内容的范围(滚动范围)

    self.scrollView.contentInset = UIEdgeInsetsMake(200, 400, 800, 1600);//设置内边距
   }
-(IBAction)scroll{
    CGPoint offset = self.scrollView.contentOffset;
    offset.x+=10;
    offset.y+=10;
    [self.scrollView  setContentOffset:offset animated:YES];
}

@end