iOS: How to dynamically add image to a parent view?

问题

I've got a main image on the screen, and have an "overlay" UIView placed on top of it with the background color set to Clear Color. I want to dynamically place other images inside the overlay view as follows:

UIImage* m_icon = [[UIImage alloc]initWithContentsOfFile:@"icon.png"]; 
UIImageView *imageView = [[UIImageView alloc] initWithImage:m_icon];
[m_OverlayView addSubview:imageView];

But the icon image isn't showing up. What am I missing?

回答1:

You may try:

NSString *icon_path = [[NSBundle mainBundle] pathForResource:@"icon" ofType:@"png"];
UIImage* m_icon = [[UIImage alloc]initWithContentsOfFile:icon_path]; 
UIImageView *imageView = [[UIImageView alloc] initWithImage:m_icon];
[m_OverlayView addSubview:imageView];

来源：https://stackoverflow.com/questions/22571075/ios-how-to-dynamically-add-image-to-a-parent-view