SelecterContentScrollView.m 1.8 KB

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  1. //
  2. // SelecterContentScrollView.m
  3. // SelecterTools
  4. //
  5. // Created by zhao on 16/3/15.
  6. // Copyright © 2016年 xincheng. All rights reserved.
  7. //
  8. #import "SelecterContentScrollView.h"
  9. #define WIDTH [UIScreen mainScreen].bounds.size.width
  10. #define HEIGHT [UIScreen mainScreen].bounds.size.height
  11. @interface SelecterContentScrollView ()<UIScrollViewDelegate>
  12. @property(nonatomic,retain)NSArray *vcArr;
  13. @property(nonatomic,copy)ScrollPage scrollPage;
  14. @end
  15. @implementation SelecterContentScrollView
  16. -(instancetype)initWithSeleterConditionTitleArr:(NSArray *)vcArr andBtnBlock:(ScrollPage)page
  17. {
  18. self = [super init];
  19. if (self) {
  20. self.frame = CGRectMake(0,104,WIDTH,HEIGHT-self.frame.origin.y);
  21. self.backgroundColor = [UIColor whiteColor];
  22. _vcArr = vcArr;
  23. [self lazyLoadVcFromIndex:0];
  24. self.pagingEnabled = YES;
  25. self.contentSize = CGSizeMake(WIDTH * vcArr.count,self.frame.size.height);
  26. self.delegate = self;
  27. self.scrollPage = page;
  28. }
  29. return self;
  30. }
  31. -(void)updateVCViewFromIndex:(NSInteger )index
  32. {
  33. // [self lazyLoadVcFromIndex:index];
  34. [self setContentOffset:CGPointMake(index*WIDTH, 0) animated:YES];
  35. }
  36. //懒加载策略
  37. -(void)lazyLoadVcFromIndex:(NSInteger )index
  38. {
  39. UIViewController *vc = _vcArr[index];
  40. vc.view.frame = CGRectMake(WIDTH*index,0, WIDTH,self.frame.size.height);
  41. [self addSubview:vc.view];
  42. }
  43. -(void)scrollViewDidScroll:(UIScrollView *)scrollView
  44. {
  45. int page = (scrollView.contentOffset.x+WIDTH/2)/WIDTH;
  46. [self lazyLoadVcFromIndex:page];
  47. self.scrollPage(page);
  48. }
  49. /*
  50. // Only override drawRect: if you perform custom drawing.
  51. // An empty implementation adversely affects performance during animation.
  52. - (void)drawRect:(CGRect)rect {
  53. // Drawing code
  54. }
  55. */
  56. @end