YYXC_Student/jiaPei/EXButton.m

#import "EXButton.h"

@implementation EXButton

-(id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        [self.titleLabel setTextAlignment:NSTextAlignmentCenter];
    }
    return self;
}

-(void)drawRect:(CGRect)rect
{
    //画贝塞尔曲线之类的
    CGFloat lw = 2.0;
    UIColor *color = KlineColor;
    [color set];//设置线条颜色
    CGFloat d = self.frame.size.width * .8;
    CGFloat x = (self.width - d)/2.0;
    UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(x, x, d, d)];
    path.lineWidth = lw;
    [path stroke];//空心的图形
}

-(CGRect)imageRectForContentRect:(CGRect)contentRect
{
    CGFloat d = self.width * .8;
    CGFloat x = (self.width - d)/2.0;
    return CGRectMake(x, x, d, d);
}

-(CGRect)titleRectForContentRect:(CGRect)contentRect
{
    return self.bounds;
}

@end


/**
 往btn里面加图片如何。
 */