如何使用NSLog打印CGPoint、CGSize、CGRect

平时调试程序的时候，经常会使用NSLog打印出来。当有CGPoint、CGSize、CGRect对象要打印时，一般要写成下面的方式：

CGPoint point = CGPointMake(0, 20);
NSLog(@"Point: x=%f, y=%f", point.x, point.y);

CGSize size = CGSizeMake(200, 100);
NSLog(@"Size: w=%f, h=%f", size.width, size.height);

CGRect rect = CGRectMake(0, 0, 200, 100);
NSLog(@"Rect: x=%f, y=%f, w=%f, h=%f", rect.origin.x, rect.origin.y, rect.size.width, rect.size.height);

今天看到一篇文章：How to Use NSLog to Debug CGRect and CGPoint，才了解到有一些其他方便的方法。

CGPoint point = CGPointMake(0, 20);
NSLog(@"Point: %@", NSStringFromCGPoint(point));

CGSize size = CGSizeMake(200, 100);
NSLog(@"Size: %@", NSStringFromCGSize(size));

CGRect rect = CGRectMake(0, 0, 200, 100);
NSLog(@"Rect: %@", NSStringFromCGRect(rect));

打印结果：

Point: {0, 20}
Size: {200, 100}
Rect: \{\{0, 0\}, \{200, 100\}\}