设置UIView UIImage 拉伸

1、 self.view.backgroundColor = [UIColorcolorWithPatternImage:[UIImageimageNamed:@"image.jpg"]];(占内存,且不能拉伸)
2、 NSString *path = [[NSBundlemainBundle]pathForResource:@"image"ofType:@"jpg"];

self.view.backgroundColor = [UIColorcolorWithPatternImage:[UIImageimageWithContentsOfFile:path]];(同样占内存,且不能拉伸)

3、添加uiimageview (代码量太多,麻烦)
4、推荐使用
NSString *path = [[NSBundlemainBundle]pathForResource:@"image"ofType:@"jpg"];
UIImage *image = [UIImageimageWithContentsOfFile:path];
self.view.layer.contents = (id)image.CGImage;

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