模块化xib

#import/**

*  可复用组件.用于编写可嵌套的 xib 组件.

*

*  适用场景: 需要静态确定布局的页面内的UI元素的复用性问题.

*  使用方法: 在xib或storyboard中,将某一用于占位的view的 custom class 设为对一个的 component, 则初始化时,会自动使用此component对应的xib文件中的内容去替换对应位置.

*  注意: 对于可动态确定布局的部分,如tableView中的cell,直接自行从xib初始化即可,不必继承于 MCComponent.

*/

@interface MCComponent : UIView

@end

#import "MCComponent.h"

@implementation MCComponent

- (instancetype)initWithCoder:(NSCoder *)aDecoder

{

self = [super initWithCoder:aDecoder];

if (nil != self) {

UIView * contentView = [[[NSBundle mainBundle] loadNibNamed: NSStringFromClass([self class]) owner:self options:nil] firstObject];

contentView.translatesAutoresizingMaskIntoConstraints = NO;

self.translatesAutoresizingMaskIntoConstraints = NO;

[self addSubview: contentView];

[self addConstraint: [NSLayoutConstraint constraintWithItem: contentView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem: self attribute:NSLayoutAttributeLeft multiplier: 1.0 constant: 0]];

[self addConstraint: [NSLayoutConstraint constraintWithItem: contentView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem: self attribute:NSLayoutAttributeRight multiplier: 1.0 constant: 0]];

[self addConstraint: [NSLayoutConstraint constraintWithItem: contentView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem: self attribute:NSLayoutAttributeTop multiplier: 1.0 constant: 0]];

[self addConstraint: [NSLayoutConstraint constraintWithItem: contentView attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem: self attribute:NSLayoutAttributeBottom multiplier: 1.0 constant: 0]];

}

return self;

}

/*

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

- (void)drawRect:(CGRect)rect {

// Drawing code

}

*/

@end