CODEWITHSUNDEEP
iosobjective-cuibutton
BlackMamba
BlackMamba

Reputation: 10254

How to pass target parameter for UIButton?

I write one category method in UIView+Extensions.m:

@interface UIView (Extensions)
+ (UIView*)configureMoreViewWithBtns:(NSArray*)btnsConf;
@end

+ (UIView*)configureMoreViewWithBtns:(NSArray*)btnsConf
{
    UIView* moreView = [[self alloc] initWithFrame:CGRectMake(195, 180, 120, 100)];
    [moreView setBackgroundColor:[UIColor lightGrayColor]];
    for (int i = 0; i < btns.count; i++) {
        NSDictionary* confDict = btnsConf[i];

        UIButton* btn = [[UIButton alloc] initWithFrame:CGRectMake(0, i*30 + 10, 120, 20)];
        btn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;
        [btn setTitle:confDict[@"title"] forState:UIControlStateNormal];
        [btn addTarget:self 
                action:NSSelectorFromString(confDict[@"selector"] 
    forControlEvents:UIControlEventTouchUpInside];
        [moreView addSubView:btn];
    }
    return moreView;
}

But this implement is wrong, because i don't know how pass target parameter from my ViewController?

In my viewController, i called this method like this:

- (void)handleMoreImageTapped:(UITapGestureRecognizer*)gestureRecognizer
{
    NSLog(@"%s", __FUNCTION__);
    UITableViewCell* tappedCell = [UIView tableViewCellFromTapGestture:gestureRecognizer];

    NSArray* btnsConf = @[
        @{@"title": @"分享", @"selector": NSStringFromSelector(@selector(handleShare:))},
        @{@"title": @"私信", @"selector": NSStringFromSelector(@selector(handleSiXin:))},
        @{@"title": @"举报或屏蔽", @"selector": NSStringFromSelector(@selector(handleJuBao:))}
                         ];  
    UIView* moreView = [UIView configureMoreViewWithBtns:btnsConf];    
}

Upvotes: 0

Views: 205

Answers (1)

hoiberg
hoiberg

Reputation: 361

You need to also pass the target (the object the selector would be called on, in this case the viewcontroller from which you call the configuremoreviewwithbtns method) in the dictionairies. So a dictionairy you add to the array would become

@{@"title": @"thetitle", @"selector": NSStringFromSelector(@selector(theselector:)), @"target": self},

and you'd have to change the UIView extension to this:

[btn addTarget:confDict[@"target"]
            action:NSSelectorFromString(confDict[@"selector"] 
forControlEvents:UIControlEventTouchUpInside];

Upvotes: 2

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