为什么在storyboard里面都是隐藏的,但是编译之后还是显示出来了?
UIImageView能用来做sprite吗?
imageView.clipsToBounds = YES;
have a try
想修改图片于View的相对坐标,可以增加一个CALayer用于存放图片,或者索性将一个UIImageView *a作为另一个UIView *b的subview,然后调整a的frame。
下面代码示范了如何使用CAlayer做到修改图片坐标
此类继承自UIView,setImageFrame方法可以修改图片相对于View的坐标或大小等。
// // OTImageView.m // ClipDemo // // Created by openthread on 5/31/12. // Copyright (c) 2012 __MyCompanyName__. All rights reserved. // #import "OTImageView.h" #import <QuartzCore/QuartzCore.h> @implementation OTImageView { CALayer *_imageLayer; } #pragma mark - Image Methods - (UIImage *)image { CGImageRef imageRef = (__bridge CGImageRef)_imageLayer.contents; UIImage *image = [UIImage imageWithCGImage:imageRef]; return image; } - (void)setImage:(UIImage *)image { CGImageRef imageRef = image.CGImage; _imageLayer.contents = (__bridge id)imageRef; } #pragma mark - Frame Methods - (void)setImageFrame:(CGRect)imageFrame { _imageLayer.frame = imageFrame; } #pragma mark Life Cycle - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; if (self) { _imageLayer = [CALayer layer]; _imageLayer.backgroundColor = [UIColor blueColor].CGColor; _imageLayer.frame = CGRectMake(0, 0, frame.size.width, frame.size.height); [self.layer addSublayer:_imageLayer]; } return self; } @end