#import "ViewController.h"

@interface ViewController ()

@property(strong,nonatomic)UIImageView *imgView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
   
    self.imgView = [[UIImageView alloc] initWithFrame:CGRectMake(200, 200, 200, 200)];
    [self.view addSubview:self.imgView];
    //圖片裁剪重新生成一張照片
    
    //加載照片
    UIImage *image = [UIImage imageNamed:@""];
    
    //設(shè)置圓形裁剪區(qū)域，正切與圖片
    //創(chuàng)建圓形的路徑
    UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, image.size.width, image.size.height)];
    //把路徑設(shè)置為裁剪區(qū)域
    [path addClip];
    
    //繪制圖片
    [image drawAtPoint:CGPointZero];
    
    //從上下文中獲取圖片
    UIImage *clipImage = UIGraphicsGetImageFromCurrentImageContext();
    
    //關(guān)閉上下文
    UIGraphicsEndImageContext();
    
    self.imgView.image = clipImage;

}