ios - 如何从 NSUserDefaults 中检索无符号整数？

Question

我已经使用 NSUserDefaults 保存了一个 u_int32_t 值

[[NSUserDefaults standardUserDefaults] setObject:[NSNumber numberWithUnsignedInteger:(unsigned value) forKey:@"xyz"]

但我无法使用

检索它

[[NSUserDefaults standardUserDefaults] objectForKey:@"xyz"]

Answer 1

I get "Warning: Incompatible pointer to integer conversion assigning to 'u_int32_t from 'id_Nullable'"

这是因为您取回了包含在 NSNumber 中的 unsigned int。现在你需要打开它:

unsigned int uv = [[[NSUserDefaults standardUserDefaults] objectForKey:@"xyz"] unsignedIntValue];