我想这是另一个新手问题，但是在按下按钮后，四处寻找将按钮的图像和按钮背景更改为xcode的方法， 我只能找到setBackgroundImage：forState：UIControlStatePressed方法，看起来很简单但仅限于使用光栅图形。
如果使用UIBezierPath使用曲线和渐变制作按钮，我真的找不到如何产生相同的效果。
提前感谢您的帮助
这里我插入我放入自定义按钮类的方法：CButton.m 我试图设置一个if .. else条件链接到按钮压力，但仍然没有结果
- (void)drawRect:(CGRect)rect
{
if (UIControlEventAllTouchEvents) {
CGContextRef context = UIGraphicsGetCurrentContext();
UIColor* color2 = [UIColor colorWithRed:0 green:0.429 blue:0.429 alpha:1];
UIColor* color3 = [UIColor colorWithRed:0.8 green: 0.933 blue: 1 alpha:1];
UIColor* shadow = [color2 colorWithAlphaComponent: 0.09];
CGSize shadowOffset = CGSizeMake(13.1, 13.1);
CGFloat shadowBlurRadius = 0.5;
myButton = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(8, 6.5, 185, 50.8) cornerRadius:3.1];
CGContextSaveGState(context);
CGContextSetShadowWithColor(context, shadowOffset,shadowBlurRadius, shadow.CGColor);
[color3 setFill];
[myButton fill];
CGContextRestoreGState(context);
}
else if (!UIControlEventAllTouchEvents) {
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = UIGraphicsGetCurrentContext();
UIColor* color2 = [UIColor colorWithRed:1 green:0.933 blue:0.8 alpha:1];
UIColor* color3 = [UIColor colorWithRed:1 green:0.114 blue:0.114 alpha:1];
NSArray* gradientColors = [NSArray arrayWithObjects:
(id)color2.CGColor,
(id)[UIColor colorWithRed:1 green:0.524 blue:0.457 alpha:1].CGColor,
(id)color3.CGColor,nil];
CGFloat gradientLocations[] = {0, 0.29, 1};
CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)(gradientColors), gradientLocations);
myButton = [UIBezierPath bezierPathWithArcCenter:CGPointMake(32.2, 30) radius:0.5 startAngle:5 endAngle:50 clockwise:YES];
[myButton moveToPoint:CGPointMake(102.5, 59)];
[myButton addCurveToPoint:CGPointMake(88.5, 97) controlPoint1:CGPointMake(103.07, 64.7) controlPoint2:CGPointMake(88.5, 97)];
[myButton addLineToPoint:CGPointMake(113.5, 66)];
[myButton addLineToPoint:CGPointMake(144.5, 114)];
[myButton addLineToPoint:CGPointMake(131.5, 59)];
[myButton addLineToPoint:CGPointMake(211.5, 66)];
[myButton addLineToPoint:CGPointMake(131.5, 41)];
[myButton addLineToPoint:CGPointMake(126.5, 7)];
[myButton addLineToPoint:CGPointMake(113.5, 41)];
[myButton addLineToPoint:CGPointMake(77.5, 23)];
[myButton addCurveToPoint:CGPointMake(102.5, 59) controlPoint1:CGPointMake(77.5, 23) controlPoint2:CGPointMake(101.93, 53.3)];
[myButton closePath];
myButton.miterLimit = 11;
CGContextSaveGState(context);
[myButton addClip];
CGContextDrawRadialGradient(context, gradient, CGPointMake(118.72, 52.63), 3.79,
CGPointMake(107.76, 55.37), 94.63,
kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation);
CGContextRestoreGState(context);
CGGradientRelease(gradient);
CGColorSpaceRelease(colorSpace);
}
}
@end
在我的ViewController中我当然是一个用于检测按钮压力的IBActyion。
抱歉我缺乏适当的解释，但我仍然很擅长objc 再次提前致谢答案 0 :(得分：0)
使用相同的代码
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state
控件的状态
控件一次可以有多个状态。取决于控制，国家的识别方式不同
enum {
UIControlStateNormal = 0,
UIControlStateHighlighted = 1 << 0,
UIControlStateDisabled = 1 << 1,
UIControlStateSelected = 1 << 2,
UIControlStateApplication = 0x00FF0000,
UIControlStateReserved = 0xFF000000
};
答案 1 :(得分：0)
好的，我解决了删除我的自定义按钮类并实现“普通”UIButton设置UIControlState，如Ramshad提供的枚举所示。 我也可以实现一个UIBezierPath将它加载到一个单独的UIImage *对象
中这是我至少在ViewController.m中使用的代码：
这样可以在触摸时实现按钮更改：
-(UIImage*) preTouch{
CGRect rect = CGRectMake(0.0, 0.0, 100.0, 100.0);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = UIGraphicsGetCurrentContext();
UIGraphicsBeginImageContext(rect.size);
UIColor* color2 = [UIColor colorWithRed:1 green:0.933 blue:0.8 alpha:1];
UIColor* color3 = [UIColor colorWithRed:1 green:0.114 blue:0.114 alpha:1];
NSArray* gradientColors = [NSArray arrayWithObjects:
(id)color2.CGColor,
(id)[UIColor colorWithRed:1 green:0.524 blue:0.457 alpha:1].CGColor,
(id)color3.CGColor,nil];
CGFloat gradientLocations[] = {0, 1};
CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef)(gradientColors), gradientLocations);
UIBezierPath* newBezier = [UIBezierPath bezierPath];//]WithArcCenter:CGPointMake(32.2, 30) radius:0.5 startAngle:5 endAngle:50 clockwise:YES];
[newBezier moveToPoint:CGPointMake(31.48, 59.3)];
[newBezier addLineToPoint:CGPointMake(17.81, 65.66)];
[newBezier addLineToPoint:CGPointMake(39.29, 67.25)];
[newBezier addLineToPoint:CGPointMake(51, 89.5)];
[newBezier addLineToPoint:CGPointMake(56.86,68.84)];
[newBezier addLineToPoint:CGPointMake(92, 59.3)];
[newBezier addLineToPoint:CGPointMake(63.69, 50.56)];
[newBezier addLineToPoint:CGPointMake(76.38, 0.5)];
[newBezier addLineToPoint:CGPointMake(51,45)];
[newBezier addLineToPoint:CGPointMake(31.48,16.39)];
[newBezier addLineToPoint:CGPointMake(39.29,45)];
[newBezier addLineToPoint:CGPointMake(10,35.46)];
[newBezier addLineToPoint:CGPointMake(31.48,59.3)];
[newBezier closePath];
newBezier.miterLimit = 18;
[color3 setFill];
[newBezier fill];
CGContextSaveGState(context);
[newBezier addClip];
CGContextDrawRadialGradient(context, gradient, CGPointMake(118.72, 52.63), 3.79,
CGPointMake(107.76, 55.37), 94.63,
kCGGradientDrawsBeforeStartLocation | kCGGradientDrawsAfterEndLocation);
CGContextRestoreGState(context);
CGGradientRelease(gradient);
CGColorSpaceRelease(colorSpace);
CGContextAddPath(context, newBezier.CGPath);
UIImage *buttonImage1 = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsPopContext();
UIGraphicsEndImageContext();
return buttonImage1;}
这是在触摸按钮时设置行为
- (IBAction)buttonPressed: (UIButton*) sender{
UIImage* buttonImage = [[UIImage alloc]init];
buttonImage = [self preTouch];
UIImage* myImage = buttonImage;
[newButton setBackgroundImage: myImage forState:1 <<0];
再次感谢支持