自定義控制元件實時檢視

• 建立一個xib檔案關聯某個view
• 在view定義哪裡新增IB_DESIGNABLE

IB_DESIGNABLE
@interface xxView ()
@end

• 圖片不顯示是由於bundel問題,寫個UIImage的分類

+ (UIImage *)imageWithNamed:(NSString *)name bundleForClass:(Class)cls {
    NSBundle *bundle;
#if TARGET_INTERFACE_BUILDER
    bundle = [NSBundle
 
 bundleForClass:cls];
#else
    bundle = [NSBundle mainBundle];
#endif
    return [UIImage imageNamed:name inBundle:bundle compatibleWithTraitCollection:nil];
}