//
//  JLViewController.m
//  05-條紋背景
//
//  Created by Mac on 15-3-22.
//  Copyright (c) 2015年 vxinyou. All rights reserved.
//

#import "JLViewController.h"

@interface JLViewController ()

@end

@implementation JLViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
//    [self tile];
    
//    [self fill];
    
    [self listBackground];
}

/**
 *  模仿listView的分割線，給view設定條紋背景，效果圖如圖3所示。
 */
- (void)listBackground{

    // 1.建立一行背景圖片(會以這張圖片為單位，平鋪整個view)
    CGFloat rowW = self.view.frame.size.width;
    //    CGFloat rowH = 40;
    CGFloat rowH = 30;
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(rowW, rowH), NO, 0.0);
    
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    // 畫矩形框
    [[UIColor colorWithRed:142/255.0 green:255/255.0 blue:180/255.0 alpha:255/255.0] set];
    CGContextAddRect(ctx, CGRectMake(0, 0, rowW, rowH));
    CGContextFillPath(ctx);
    
    // 2.畫線
    [[UIColor grayColor] set];
    CGFloat lineWidth = 2;
    CGContextSetLineWidth(ctx, lineWidth);
    CGFloat dividerX = 5;
    CGFloat dividerY = rowH - lineWidth;
    CGContextMoveToPoint(ctx, dividerX, dividerY);
    CGContextAddLineToPoint(ctx, rowW - dividerX, dividerY);
    CGContextStrokePath(ctx);
    
    // 3.取圖
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    // 4.結束上下文
    UIGraphicsEndImageContext();
    
    // 5.設定為背景
    self.view.backgroundColor = [UIColor colorWithPatternImage:newImage];
}

/**
 *  將一張圖片填充整個view，效果圖如圖2所示
 */
- (void)fill{

    UIImage *image = [UIImage imageNamed:@"me"];
    
    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, NO, 0.0);
    
    [image drawInRect:self.view.bounds];
    
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    // UIView不像UIImageView有個image屬性。
    self.view.backgroundColor = [UIColor colorWithPatternImage:newImage];
}

/**
 *  將一張圖片以平鋪的方式鋪滿整個view，效果圖如圖1所示
 */
- (void)tile{

    UIImage *image = [UIImage imageNamed:@"me"];
    
    self.view.backgroundColor = [UIColor colorWithPatternImage:image];
}

@end