Question

我谈一下某些我们的问题。

- (void)translateTextPosition:(CGSize)size {
NSLog(@"before tx = %f, %f",_textMatrix.tx,size.width);
_textMatrix = CGAffineTransformTranslate(_textMatrix, size.width, size.height);
NSLog(@"tx = %f",_textMatrix.tx);
}

But output shows that

2011-10-26 18:57:03.351 PDF[62708:b903] Tm tx:48.437599 ty:752.559387
2011-10-26 18:57:03.353 PDF[62708:b903] before tx = 48.437599, 0.345000
2011-10-26 18:57:03.353 PDF[62708:b903] tx = 53.549774

That is not the correct result I want? What I expected is tx = 48.782599 Can someone enlighten me what is wrong with this?

Answer 1

你们正在用你现有的手法而不是其他方式,把翻译矩阵成倍。用途

_textMatrix = CGAffineTransformConcat(_textMatrix, CGAffineTransformMakeTranslation(size.width, size.height));

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