| 默认样式 |  | |
| barTintColor |  | .searchBar.barTintColor = [UIColor orangeColor] |
| backgroundImage |  | .backgroundImage = [[UIImage alloc] init]; 变为透明背景 |
| backgroundColor(单独不起作用) |  | searchBar.backgroundImage = [[UIImage alloc] init];searchBar.backgroundColor = [UIColor whiteColor]; |
| 内置的textFeild,可用kvc设置 |  | UITextField *tf = [searchBar valueForKey:@"_searchField"]; tf.backgroundColor = [UIColor redColor] |
| 隐藏边缘的黑线 | sb.layer.borderWidth = 1; sb.layer.borderColor = [[UIColor whiteColor] CGColor]; | |