私は主にSOから取得した次のコードを持っていますが、画像がまだトリミングされていません、何が間違っていますか?
@synthesize TopImage;
@synthesize BottomImage;
@synthesize RotaterImage;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
TopImage = [UIImage imageNamed:@"zero.png"];
[TopImage drawAtPoint:CGPointMake(0, 0)];
[self cropImage:TopImage:0];
[self addSubview:[[UIImageView alloc] initWithImage:TopImage]];
// BottomImage = [UIImage imageNamed:@"zero.png"];
// [BottomImage drawAtPoint:CGPointMake(0, 55)];
// [self cropImage:BottomImage:50];
// [self addSubview:[[[UIImageView alloc] initWithImage:BottomImage]retain]];
// RotaterImage = [UIImage imageNamed:@"zero.png"];
// [RotaterImage drawAtPoint:CGPointMake(0, 0) blendMode:kCGBlendModeNormal alpha:0];
// [self addSubview:[[[UIImageView alloc] initWithImage:RotaterImage]retain]];
// [self cropImage:RotaterImage:50];
}
return self;
}
-(void)cropImage:(UIImage *)image:(int)startCroppingPosition{
CGRect tempRect = CGRectMake(0, startCroppingPosition, 23, 40);
CGImageRef imageRef = CGImageCreateWithImageInRect([image CGImage], tempRect);
// or use the UIImage wherever you like
image = [UIImage imageWithCGImage:imageRef];
CGImageRelease(imageRef);
}
私はIOSを初めて使用するので、助けていただければ幸いです。