我有一个CG点:
ballVelocity = CGPointMake(kBallSpeedX,kBallSpeedX);
and i would like a label (xVelocityLabel) to view the "ballVelocity.x" value of the CGPoint. I have tried:
[xVelocityLabel setText:[NSString stringWithFormat:@"%@", ballVelocity.x]];
谢谢你的帮助 因为我是新来的
只需更改% f 而不是% 。
[xVelocityLabel setText:[NSString stringWithFormat:@"%f", ballVelocity.x]];
我想这会对你有所帮助
[xVeloityLabel setText:NSStringFromCGPoint(球速度)];
ballVelocity.x // this is a float value.
所以,你必须把它转换成NSString,然后把它放在UILABel上。
要在 xVelocityLabel 上设定值,该值应以字符串格式显示。请参见此转换 -
NSString *strNumber = [[NSNumber numberWithFloat:ballVelocity.x] stringValue];
[xVelocityLabel setText:strNumber];
谢谢!
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