核心圖：如何在左側，右側，頂部和底部添加四個軸

Question

默認情況下，左側和底部只有兩個軸，我想在右側和底部添加另一個拖動軸以顯示相同的刻度和標籤。

在此先感謝。

Answer 1

你可以做到這一點的限制使你的軸時，

CPTXYAxis *x = [self _makeDefaultAxis]; 
x.coordinate = CPTCoordinateX; 
x.axisConstraints = [CPTConstraints constraintWithLowerOffset:0.0]; 
x.tickDirection = CPTSignPositive; 
// ... 

CPTXYAxis *y = [self _makeDefaultAxis]; 
y.coordinate = CPTCoordinateY; 
y.axisConstraints = [CPTConstraints constraintWithLowerOffset:0.0]; 
y.tickDirection = CPTSignPositive; 
// ... 

CPTXYAxis *y2 = [self _makeDefaultAxis]; 
y2.coordinate = CPTCoordinateY; 
y2.axisConstraints = [CPTConstraints constraintWithUpperOffset:0.0]; 
y2.tickDirection = CPTSignNegative; 
// ... 

CPTXYAxis *x2 = [self _makeDefaultAxis]; 
x2.coordinate = CPTCoordinateX; 
x2.axisConstraints = [CPTConstraints constraintWithUpperOffset:0.0]; 
x2.tickDirection = CPTSignNegative; 

其中給出類似，

所以也表明你需要的標籤，以調節填充等