UIButton 字体颜色 粗体

UIButton * btn=[[UIButton alloc] initWithFrame:CGRectMake(5, 5,50,30)];

[btn setTitle:@"xxx" forState:UIControlStateNormal];btn.backgroundColor=YYColor(247, 247, 247);[btn setTitleColor:YYColor(234, 167, 39)  forState:UIControlStateNormal];btn.font=[UIFont systemFontOfSize:15];

//粗体
[btn setFont :[ UIFont fontWithName : @”Helvetica-Bold” size : 15 ]];
[self.view addSubview:btn];

//边框线
btn.layer.borderWidth = 1;
btn.layer.borderColor = [[UIColor grayColor] CGColor];