不需要一句代碼，給UI控件設(shè)置圓角和陰影及1px的兼容

• 在看這篇文章之前 請(qǐng)先參看IBInspectable 和 IB_DESIGNABLE
• 在Xib中 系統(tǒng)自帶的UI控件中 添加一些 額外的屬性

• eg：

  
  

• 效果

  
  

示例代碼：

特別注意：
如果想實(shí)時(shí)監(jiān)聽MBIBnspectable的改變的話，需要繼承一個(gè)空的基類，或者自定義的類。
如果需要的話請(qǐng)繼承于PXBaseView.h

• UIView的xib擴(kuò)展
• .h文件

#import <UIKit/UIKit.h>
IB_DESIGNABLE
/** View的XIB可視化擴(kuò)展類> */
@interface UIView (IBnspectable)
/*!
 * 給UIView 設(shè)置圓角
 */
@property (assign,nonatomic) IBInspectable NSInteger cornerRadius;
@property (assign,nonatomic) IBInspectable BOOL  masksToBounds;

/*!
 * 設(shè)置 view的 邊框顏色(選擇器和Hex顏色) 
 * 以及 邊框的寬度
 */
@property (assign,nonatomic) IBInspectable NSInteger borderWidth;
@property (strong,nonatomic) IBInspectable NSString  *borderHexRgb;
@property (strong,nonatomic) IBInspectable UIColor   *borderColor;
/*!
 * 設(shè)置view的背景Hex顏色 (選擇器顏色 是系統(tǒng)自帶的不需要寫)
 */
@property (assign,nonatomic) IBInspectable NSString  *hexRgbColor;
//TODO: 特別注意
/*!
 * 這個(gè)屬性可以開啟 Retina屏對(duì) 1px的支持
 * Retain屏的分辨率 [UIScreen mainScreen].scale分辨率是 >=2
 * 
 */
@property (assign,nonatomic) IBInspectable BOOL      onePx;
@end

• .m文件的實(shí)現(xiàn)

@implementation UIView (IBnspectable)
- (void)setCornerRadius:(NSInteger)cornerRadius{
    self.layer.cornerRadius = cornerRadius;
    self.layer.masksToBounds = cornerRadius > 0;
}

- (NSInteger)cornerRadius{
    return self.layer.cornerRadius;
}

- (void)setBorderWidth:(NSInteger)borderWidth{
    self.layer.borderWidth = borderWidth;
}

- (NSInteger)borderWidth{
    return self.layer.borderWidth;
}

- (void)setBorderColor:(UIColor *)borderColor{
    self.layer.borderColor = borderColor.CGColor;
}

- (UIColor *)borderColor{
    return [UIColor colorWithCGColor:self.layer.borderColor];
}

- (void)setBorderHexRgb:(NSString *)borderHexRgb{
    NSScanner *scanner = [NSScanner scannerWithString:borderHexRgb];
    unsigned hexNum;
    //這里是將16進(jìn)制轉(zhuǎn)化為10進(jìn)制
    if (![scanner scanHexInt:&hexNum])
        return;
    self.layer.borderColor = [self colorWithRGBHex:hexNum].CGColor;
}

-(NSString *)borderHexRgb{
    return @"0xffffff";
}

- (void)setMasksToBounds:(BOOL)bounds{
    self.layer.masksToBounds = bounds;
}

- (BOOL)masksToBounds{
    return self.layer.masksToBounds;
}

#pragma mark - hexRgbColor
- (void)setHexRgbColor:(NSString *)hexRgbColor{
    NSScanner *scanner = [NSScanner scannerWithString:hexRgbColor];
    unsigned hexNum;
    if (![scanner scanHexInt:&hexNum]) return;
    self.backgroundColor = [self colorWithRGBHex:hexNum];
}

- (UIColor *)colorWithRGBHex:(UInt32)hex {
    int r = (hex >> 16) & 0xFF;
    int g = (hex >> 8) & 0xFF;
    int b = (hex) & 0xFF;
    
    return [UIColor colorWithRed:r / 255.0f
                           green:g / 255.0f
                            blue:b / 255.0f
                           alpha:1.0f];
}


- (NSString *)hexRgbColor{
    return @"0xffffff";
}

#pragma mark - setOnePx
- (void)setOnePx:(BOOL)onePx{
    if (onePx) {
        CGRect rect = self.frame;
        rect.size.height = 5/ [UIScreen mainScreen].scale;
        self.frame = rect;
    }
}

- (BOOL)onePx{
    return self.onePx;
}
@end

GitHub地址：https://github.com/421696067/Category-Xib.git