Looking in the headers, I can see that for the 64-bit system I'm compiling for, both NSUInteger and UInt32 are defined as 32 bit unsigned integers, so why is Xcode claiming a loss in precision in a warning when I assign one to the other?Looking in the headers, I can see that for the
阅读背景：
Cocoa：NSUInteger和UInt32都定义为32位无符号整数。那警告为什么呢？
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