自定义ScrollView，如何让NSView setFrame: 更快？
我正在制作自己的 ScrollView。 这是我用于使用鼠标滚轮或触摸板滚动的代码 但它的工作并不完美。它有点滞后。
- (void) scrollWheel:(NSEvent *)theEvent
{
NSRect rect = [contentView frame];
rect.origin.x += [theEvent deltaX];
rect.origin.y += [theEvent deltaY];
[contentView setFrame:rect];
}
当我对图层执行相同的操作（用于测试）时，效果会更好。
[CATransaction setDisableActions:YES];
[CATransaction begin];
[contentView layer].frame = newRect;
[CATransaction commit];
如何让setFrame完美工作？
I am making my own ScrollView.
here is the code i use for scrolling with mouse wheel or touchpad
but it doesn't work flawless. it lags a bit.
- (void) scrollWheel:(NSEvent *)theEvent
{
NSRect rect = [contentView frame];
rect.origin.x += [theEvent deltaX];
rect.origin.y += [theEvent deltaY];
[contentView setFrame:rect];
}
when i do the same with layers (for test) it works much better.
[CATransaction setDisableActions:YES];
[CATransaction begin];
[contentView layer].frame = newRect;
[CATransaction commit];
how to make setFrame work flawless?
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我正在努力研究苹果在 NSScrollView 中是如何做到这一点的。答案是他们进行高性能绘图 - 仅更改部分，而不是通常完成的整个视图。
之后我决定自定义标准滚动视图和标准滚动条。
I was looking hard, on how it is done by apple in NSScrollView. and the answer is that they make high performance drawing - only the changed parts, not the whole view as it is usually done.
After that i decided to customize the standard scrollView and standard scrollers.