label.position = CGPointMake(self.size.width*0.125, self.size.height-CGFloat(0.15)*self.size.height*_activeEnemiesArray.count)
I get an error pointing to self.size.width
that says
'CGFloat' is not convertible to 'Double'.
This makes sense, since a CGFloat
value and a Double
value cannot be multiplied, but then when I convert the 0.125
to CGFloat
:
label.position = CGPointMake(self.size.width*CGFloat(0.125), self.size.height-0.15*self.size.height*_activeEnemiesArray.count)
I get an error pointing to self.size.width
that says
'CGFloat' is not convertible to 'UInt8'
This does not make any sense. Has anyone else been experiencing this and what could be the cause?
你试一试
self.frame.size.width
Xcode is leading you astray -- literals shouldn't really ever cause problems, as they'll get converted into Double
or CGFloat
as needed once everything else is the same type. Instead, what's going on is that you have an Int
at the very end of your line:
... * self.size.height * _activeEnemiesArray.count)
That count
property needs to be converted to CGFloat
so it can be used with the rest:
... * self.size.height * CGFloat(_activeEnemiesArray.count))
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