UIImageView默认的UserInteractionEnabled是NO

最新推荐文章于 2015-04-16 14:23:00 发布

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最新推荐文章于 2015-04-16 14:23:00 发布

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分类专栏： iphone 文章标签： UIImageView UserInteractionEnabled

本文链接：https://blog.youkuaiyun.com/lizaochengwen/article/details/84180045

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本文探讨了在iOS开发中遇到的问题：如何在UIImageView作为背景的情况下，使得按钮或UITextField能够响应事件。通过将按钮或UITextField放置在一个单独的UIView上，然后将这个UIView作为UIImageView的子视图，可以解决事件响应问题。此方法适用于解决类似场景下的界面布局与交互设计问题。

一直习惯用UIImageView作为背景，但直接把按钮或者UITextField放在上面无法相应事件。如下面：

UIImageView * commentBG = [[UIImageViewalloc]initWithFrame:CGRectMake(0,370, 320, 35)];
commentBG.image = [[UIImageimageNamed:@"seachbg.png"]stretchableImageWithLeftCapWidth:2topCapHeight:2];

UITextField * commentField = [[UITextFieldalloc] initWithFrame:CGRectMake(10,10,250,30)];
commentField.borderStyle =UITextBorderStyleRoundedRect;
commentField.placeholder =@"写评论";
commentField.backgroundColor = [UIColorwhiteColor];
commentField.delegate =self;
commentField.returnKeyType =UIReturnKeyGo;
[commentBG addSubview:commentField];
[commentField release];

[self.viewaddSubview:commentBG];
[commentBG release];

这是因为UIImageView默认的UserInteractionEnabled是NO，修改方法可以在添加
commentBG.UserInteractionEnabled＝NO;
也可以建一个UIView，把背景放在UIView上，再把按钮或者UITextField放在UIView上面。如下面：
UIView * commentView = [[UIViewalloc] initWithFrame:CGRectMake(0,370, 320, 35)];
UIImageView * commentBG = [[UIImageViewalloc]initWithFrame:CGRectMake(0,370, 320, 35)];
commentBG.image = [[UIImageimageNamed:@"seachbg.png"]stretchableImageWithLeftCapWidth:2topCapHeight:2];
[commentView addSubview:commentBG];
[commentBG release];

UITextField * commentField = [[UITextFieldalloc] initWithFrame:CGRectMake(10,10,250,30)];
commentField.borderStyle =UITextBorderStyleRoundedRect;
commentField.placeholder =@"写评论";
commentField.backgroundColor = [UIColorwhiteColor];
commentField.delegate =self;
commentField.returnKeyType =UIReturnKeyGo;
//commentField.userInteractionEnabled = YES;
[commentView addSubview:commentField];
[commentField release];

[self.viewaddSubview:commentView];
[commentView release];
原文地址：[url]http://blog.youkuaiyun.com/terrylee_cold/article/details/7198229[/url]