最近打算使用 Storyboard 開(kāi)發(fā)項(xiàng)目，但某些場(chǎng)景會(huì)用到 Storyboard 中引用 Xib，根據(jù)網(wǎng)上教程搞了一翻，但由于環(huán)境各有差異，按網(wǎng)上教程沒(méi)弄出來(lái)，后來(lái)發(fā)現(xiàn)可能是 IB 更新的原因，新版 IB 中沒(méi)有 widthable 和 heightable 屬性，所以導(dǎo)致要復(fù)用 Xib 時(shí)，AutoLayout 無(wú)效。
自己寫(xiě)了個(gè)基類(lèi)來(lái)解決這個(gè)問(wèn)題， OC 版的項(xiàng)目在 Github 上，點(diǎn)擊前往
pod 'YYNib'
Swift 版本 點(diǎn)擊前往
pod 'YYNib-swift'
兩個(gè)工程中可以使用Pod引入，注意: 如果需要支持 iOS7 的話，swift 版本不能使用 Pod 引入。
OC主要代碼如下

#import "YYNibView.h"

@implementation YYNibView

- (instancetype)initWithFrame:(CGRect)frame {
    if (self = [super initWithFrame:frame]) {
        [self initSubviews];
        
        if (CGRectIsEmpty(frame)) {
            self.frame = _contentView.bounds;
        } else {
            _contentView.frame = self.bounds;
        }
    }
    return self;
}

- (instancetype)initWithCoder:(NSCoder *)aDecoder {
    if (self = [super initWithCoder:aDecoder]) {
        [self initSubviews];
        _contentView.frame = self.bounds;
    }
    return self;
}

- (void)setFrame:(CGRect)frame {
    [super setFrame:frame];
    _contentView.frame = self.bounds;
}

- (void)setBackgroundColor:(UIColor *)backgroundColor {
    [super setBackgroundColor:backgroundColor];
    _contentView.backgroundColor = backgroundColor;
}

- (void)initSubviews {
    NSString *className = NSStringFromClass([self class]);
    _contentView = [[NSBundle mainBundle] loadNibNamed:className owner:self options:nil].firstObject;
    _contentView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    [self addSubview:_contentView];
    // Fix backgroundColor
    self.backgroundColor = _contentView.backgroundColor;
}

@end

Swift 主要代碼如下

import UIKit

class YYNibView: UIView {
    
    var contentView:UIView!;
    
    override init(frame: CGRect) {
        super.init(frame: frame);
        
        self.initWithSubviews();
        if (CGRectIsEmpty(frame)) {
            self.frame = (contentView?.bounds)!;
        } else {
            contentView?.frame = self.bounds;
        }
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder);
        self.initWithSubviews();
        self.contentView?.frame = self.bounds;
    }
    
    override var frame: CGRect {
        didSet {
            self.contentView?.frame = self.bounds;
        }
    }
    
    override var backgroundColor: UIColor? {
        didSet {
            self.contentView?.backgroundColor = self.backgroundColor;
        }
    }
    
    func initWithSubviews() {
        let className = "\(self.classForCoder)"
        self.contentView = NSBundle.mainBundle().loadNibNamed(className, owner: self, options: nil).first as? UIView;
        self.contentView?.autoresizingMask = [UIViewAutoresizing.FlexibleWidth, UIViewAutoresizing.FlexibleHeight];
        self.addSubview(self.contentView!);
        // Fix backgroundColor
        self.backgroundColor = self.contentView?.backgroundColor;
    }
    
}