關於UIScrollView，UIImageView等控制元件不能響應touch事件，主要涉及到事件響應者鏈的問題，如果在UIScrollView，UIImageView等控制元件添加了子View，這樣事件響應將會被UIScrollView，UIImageView等控制元件終止，而且這些控制元件的userInteractionEnabled屬性預設的是NO，所以想要解決使用觸控事件，我通過兩種方法進行解決。

方法一：

建立UIScrollView，UIImageView等控制元件的類別檔案，將touch的四個方法進行父類方法重寫：（建立Objective-C File檔案，然後修改型別，建立對應的類別檔案）

#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：通過給UIScrollView，UIImageView等控制元件新增手勢，執行對應的方法

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];

//新增手勢

    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];
    
}

//手勢執行的方法

-(void)updateImageVAction:(UITapGestureRecognizer *)tapGR
{
    [textFie resignFirstResponder];
}