为UIView添加点击回调

给UIView添加手势使用block回调写法

• .h

#import <UIKit/UIKit.h>

NS_ASSUME_NONNULL_BEGIN

@interface UIView (Action)
- (void)extAction:(void (^)(void))action;
@end

NS_ASSUME_NONNULL_END

• .m

#import "UIView+Action.h"
#import <objc/message.h>

@interface UIView ()
@property (nonatomic, copy) void (^action)(void);
@end


@implementation UIView (Action)

- (void)setAction:(void (^)(void))action {
    objc_setAssociatedObject(self, @selector(action), action, OBJC_ASSOCIATION_COPY);
}
- (void (^)(void))action {
    return objc_getAssociatedObject(self, _cmd);
}

- (void)extAction:(void (^)(void))action {
    
    self.userInteractionEnabled = YES;
    
    [self addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(extAddTap)]];
    self.action = action;
}

- (void)extAddTap {
    if (self.action) {
        self.action();
    }
}

@end

• vc调用

- (void)test {
    [_vTest extAction:^{
        NSLog(@"tap1");
    }];
    
    __weak __typeof(self)weakSelf = self;
    [_ivTest extAction:^{
        __strong __typeof(weakSelf)strongSelf = weakSelf;
        
    }];
}