如何将uitextfield中的值传递给CGAffineTransformMakeRotation

你只需要把字符串转换成一个数字。

CGAffineTransformMakeRotation([mytextfield.text floatValue]);

#define DEGREES_TO_RADIANS(__ANGLE__) ((__ANGLE__) / 180.0 * M_PI)

-(IBAction)RotateButtonPressed:(id)sender;
{   
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:1.5];
    arrow.center = CGPointMake(151.0,80.0);
arrow.transform = CGAffineTransformMakeRotation(DEGREES_TO_RADIANS([degrees.text floatValue]));
    [UIView commitAnimations];


}

这就是我如何将弧度转换成度来进行CGAffineTransformMakeRotation的方法

供任何人日后参考