iOS開發_條紋背景

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主控制器的關鍵代碼：

ViewController.m

#import "ViewController.h"@interface ViewController ()@property (weak, nonatomic) IBOutlet UITextView *textF;@end@implementation ViewController- (void)viewDidLoad {    [super viewDidLoad];        //1. 建立一行背景圖    CGFloat rowW = self.view.frame.size.width;    CGFloat rowH = 40;    UIGraphicsBeginImageContextWithOptions(CGSizeMake(rowW, rowH), NO, 0.0);        //畫矩形框    CGContextRef ctx = UIGraphicsGetCurrentContext();    [[UIColor whiteColor] set];    CGContextAddRect(ctx, CGRectMake(0, 0, rowW, rowH));    CGContextFillPath(ctx);        //2.畫線    [[UIColor blackColor] set];    CGFloat lineWidth = 1;    CGContextSetLineWidth(ctx, lineWidth);    CGFloat dividerX = 10;    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.設定背景    self.textF.backgroundColor =[UIColor colorWithPatternImage:newImage];    }-(void)imagebg{    UIImage *oldImage = [UIImage imageNamed:@"me"];    UIGraphicsBeginImageContextWithOptions(self.view.frame.size, NO, 0.0);    [oldImage drawInRect:self.view.bounds];    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();    UIGraphicsEndImageContext();        self.view.backgroundColor =[UIColor colorWithPatternImage:newImage];}@end

 

iOS開發_條紋背景