关于UIScrollView，UIImageView等控件不能响应touch事件，主要涉及到事件响应者链的问题，如果在UIScrollView，UIImageView等控件添加了子View，这样事件响应将会被UIScrollView，UIImageView等控件终止，而且这些控件的userInteractionEnabled属性默认的是NO，所以想要解决使用触摸事件，我通过两种方法进行解决。
方法一：
创建UIScrollView，UIImageView等控件的类别文件，将touch的四个方法进行父类方法重写：（创建Objective-C File文件，然后修改类型，创建对应的类别文件）
#import "UIScrollView+TouchEvent.h"
@implementation UIScrollView (TouchEvent)
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
[[self nextResponder] touchesBegan:touches withEvent:event];
[super touchesBegan:touches withEvent:event];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
[[self nextResponder] touchesMoved:touches withEvent:event];
[super touchesMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[[self nextResponder] touchesEnded:touches withEvent:event];
[super touchesEnded:touches withEvent:event];
}
-(void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[[self nextResponder] touchesEnded:touches withEvent:event];
[super touchesEnded:touches withEvent:event];
}
@end
方法二：通过给UIScrollView，UIImageView等控件添加手势，执行对应的方法
如：
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
bgScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 200, 400)];
bgScrollView.backgroundColor = [UIColor lightGrayColor];
//添加手势
UITapGestureRecognizer *tapGestureR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(updateImageVAction:)];
[bgScrollView setUserInteractionEnabled:YES];
[bgScrollView addGestureRecognizer:tapGestureR];
[self.view addSubview:bgScrollView];
textFie = [[UITextField alloc] initWithFrame:CGRectMake(50, 50, 100, 50)];
textFie.layer.borderWidth = 1;
[bgScrollView addSubview:textFie];
}
//手势执行的方法
-(void)updateImageVAction:(UITapGestureRecognizer *)tapGR
{
[textFie resignFirstResponder];
}