UIButton的resizableImageWithCapInsets使用解析

//
//  ViewController.m
//  SpecialButton
//
//  Created by XianMingYou on 15/1/21.
//  Copyright (c) 2015年 XianMingYou. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    /*
     UIImageResizingModeTile    ：平铺模式，通过重复显示UIEdgeInsets指定的矩形区域来填充图片
     */
    UIButton *button1    = [[UIButton alloc] initWithFrame:CGRectMake(65, 250, 202, 29)];
    UIImage *norImage1   = [UIImage imageNamed:@"normal"];
    norImage1            = [norImage1 resizableImageWithCapInsets:UIEdgeInsetsMake(2, 2, 2, 2)
                                                   resizingMode:UIImageResizingModeTile];
    [button1 setBackgroundImage:norImage1 forState:UIControlStateNormal];
    [self.view addSubview:button1];
    
    /*
     UIImageResizingModeStretch ：拉伸模式，通过拉伸UIEdgeInsets指定的矩形区域来填充图片
     */
    UIButton *button2    = [[UIButton alloc] initWithFrame:CGRectMake(65, 300, 202, 29)];
    UIImage *norImage2   = [UIImage imageNamed:@"normal"];
    norImage2            = [norImage2 resizableImageWithCapInsets:UIEdgeInsetsMake(2, 2, 2, 2)
                                                   resizingMode:UIImageResizingModeStretch];
    [button2 setBackgroundImage:norImage2 forState:UIControlStateNormal];
    [self.view addSubview:button2];
}

@end