Lvalue required as left operand of assignment error

最新推荐文章于 2025-04-07 13:46:15 发布

iteye_34

最新推荐文章于 2025-04-07 13:46:15 发布

阅读量940

点赞数

CC 4.0 BY-SA版权

分类专栏： iPhone 文章标签： xcode

本文链接：https://blog.youkuaiyun.com/iteye_34/article/details/82240420

iPhone 专栏收录该内容

20 篇文章

订阅专栏

本文介绍了一种在iOS开发中遇到的L值所需作为赋值的左操作数错误，并通过修改UIView框架属性的方式成功解决了该问题。文章详细展示了如何获取CGRect并更改其属性，再将其设置回UIView。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Hello I get the "Lvalue required as left operand of assignment" error in xcode. Why? Here is my code (window1/2 are UIViewController) : - (void)loadView { UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0,0,320,460)]; UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0,0,640,460)]; self.window1 = [TweetViewController alloc]; self.window2 = [InfoViewController alloc]; [contentView addSubview:self.window1.view]; self.window2.view.frame.origin.x = 320; //HERE IS THE ERROR!! [contentView addSubview:self.window2.view]; [scrollView addSubview:contentView]; scrollView.contentSize = contentView.frame.size; scrollView.pagingEnabled = YES; self.view = scrollView; [contentView release]; [scrollView release]; } The part self.window2.view.frame will leave you with a getter, not actually reaching into and grabbing the internal frame CGRect. What you need to do is get the CGRect change it and then set it back into the view. CGRect f = self.window2.view.frame; // calls the getter f.origin.x = 320; self.window2.view.frame = f; // calls the setter