为什么这个NSLog代码为值打印零？

Question

为什么这个objective-c代码为值打印0,而在调试器中我可以看到它们具有非0值:

码

CGRect currFrame = label.frame;                 
currFrame.origin.y = currVertPos;
currFrame.origin.x = 0;
currFrame.size.height = expectedLabelSize.height;
currFrame.size.width = maxWidt  h;
NSLog(@"  currFrame dimensions:x/y/height/width = %d / %d / %d / %d", 0, currVertPos, expectedLabelSize.height, maxWidth);

什么是印刷品

currFrame dimensions:x/y/height/width = 0 / 0 / 0 / 0

Answer 1

所有这些值都有CGFloat类型,但您尝试将它们打印为ints.只需更换%d用%f.

PS苹果开发者不得不CGRect偶尔打印,所以他们提出了一些方便的方法.试试NSLog(@"currFrame dimensions: %@", NSStringFromCGRect(currFrame)).