iOS 条形码 code39 生成器
使用简单，只需将"HYCode39.h"和"HYCode39.m"文件添加到项目中，导入头文件并且使用一行代码便搞定：
#import "HYCode39.h"
barCode1.image = [HYCode39 code39ImageWithString:@"A012345-Z"
imageSize:CGSizeMake(w, h)];
也可以改变颜色和边距：
UIImageView *barCode2 = [[UIImageView alloc] initWithFrame:CGRectMake(x, 400, w, h)];
barCode2.image = [HYCode39 code39ImageWithString:@"012345STUVWXYZ-. $/+%"
imageSize:CGSizeMake(800, h)
edgeInsets:UIEdgeInsetsMake(5, 10, 5, 10)];
[self.view addSubview:barCode2];
UIImageView *barCode3 = [[UIImageView alloc] initWithFrame:CGRectMake(x, 500, w, h)];
barCode3.image = [HYCode39 code39ImageWithString:@"WWW.HLZHY.COM"
imageSize:CGSizeMake(600, h)
edgeInsets:UIEdgeInsetsMake(0, 10, 0, 10)
backgroundColor:[UIColor whiteColor]
barColor:[UIColor colorWithRed:1 green:0.75 blue:0.79 alpha:1]];
[self.view addSubview:barCode3];