設置repeatCount到1e100f給予警告

Question

從Apple Documentation：

Setting the repeatCount to 1e100f will cause the animation to repeat until it is removed from the layer. 

這裏是我的代碼：

CABasicAnimation *flicker = [CABasicAnimation animationWithKeyPath:@"opacity"]; 
flicker.repeatCount = 1e100f; 

Xcode中給出了一個警告：

Semantic Issue: Magnitude of floating-point constant too large for type 'float'; maximum is 1.7014116E+38 

什麼我做錯了嗎？

Answer 1

嘗試使用HUGE_VALF（我認爲是1e50f，但使用常量）。查找repeatCount告訴我們：

將此屬性設置爲HUGE_VALF將導致動畫永久重複。

Answer 2

change flicker.repeatCount = 1e100f; 至 flicker.repeatCount = 1e100;