//设置颜色
[changePhotoBtn setTitleColor:kBtnColor forState:UIControlStateNormal];
//设置大小
changePhotoBtn.titleLabel.font = [UIFont systemFontOfSize:16];
//设置颜色
[changePhotoBtn setTitleColor:kBtnColor forState:UIControlStateNormal];
//设置大小
changePhotoBtn.titleLabel.font = [UIFont systemFontOfSize:16];