[控件] 创建出条形间隔效果的背景LineBackgroundView

//
//  ViewController.m
//  LineBackgroundView
//
//  Created by XianMingYou on 15/3/4.
//  Copyright (c) 2015年 XianMingYou. All rights reserved.
//

#import "ViewController.h"
#import "LineBackgroundView.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
[super viewDidLoad];

UIColor *color             = [[UIColor blackColor] colorWithAlphaComponent:0.05f];
LineBackgroundView *bgView = [LineBackgroundView createViewWithFrame:self.view.bounds
LineWidth:4
lineGap:4
lineColor:color];
[self.view addSubview:bgView];
}

@end

//
//  LineBackgroundView.h
//  LineBackgroundView
//
//  Created by XianMingYou on 15/3/4.
//  Copyright (c) 2015年 XianMingYou. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface LineBackgroundView : UIView

@property (nonatomic) CGFloat            lineWidth;
@property (nonatomic) CGFloat            lineGap;
@property (nonatomic, strong) UIColor   *lineColor;

- (void)buildView;
+ (instancetype)createViewWithFrame:(CGRect)frame
LineWidth:(CGFloat)width
lineGap:(CGFloat)lineGap
lineColor:(UIColor *)color;

@end

//
//  LineBackgroundView.m
//  LineBackgroundView
//
//  Created by XianMingYou on 15/3/4.
//  Copyright (c) 2015年 XianMingYou. All rights reserved.
//

#import "LineBackgroundView.h"

// 将度数转换为弧度
#define   RADIAN(degrees)  ((M_PI * (degrees))/ 180.f)

@interface LineBackgroundView ()

@property (nonatomic, strong) UIView *containerView;

@end

@implementation LineBackgroundView

- (instancetype)initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
self.layer.masksToBounds = YES;
}
return self;
}

- (void)buildView {

if (self.lineGap <= 0 && self.lineWidth <= 0) {
return;
}

// 获取长度
CGFloat width  = self.bounds.size.width;
CGFloat height = self.bounds.size.height;
CGFloat containerViewWidth = (width + height) * 0.75;

// 初始化containView
self.containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0,
containerViewWidth,
containerViewWidth)];
self.containerView.layer.borderWidth = 1.f;
self.containerView.center            = CGPointMake(self.bounds.size.width / 2.f,
self.bounds.size.height / 2.f);

NSInteger lineViewCount = containerViewWidth / (self.lineGap + self.lineWidth);
for (int count = 0; count < lineViewCount + 1; count++) {
UIView *tempView = [[UIView alloc] initWithFrame:CGRectMake(count * (self.lineGap + self.lineWidth),
0,
self.lineWidth,
containerViewWidth)];
if (self.lineColor) {
tempView.backgroundColor = self.lineColor;
} else {
tempView.backgroundColor = [UIColor blackColor];
}

[self.containerView addSubview:tempView];
}

self.containerView.transform = CGAffineTransformRotate(self.containerView.transform, RADIAN(45));
[self addSubview:self.containerView];
}

+ (instancetype)createViewWithFrame:(CGRect)frame
LineWidth:(CGFloat)width
lineGap:(CGFloat)lineGap
lineColor:(UIColor *)color {
LineBackgroundView *bgView = [[LineBackgroundView alloc] initWithFrame:frame];
bgView.lineWidth           = width;
bgView.lineGap             = lineGap;
bgView.lineColor           = color;
[bgView buildView];

return bgView;
}

@end