一，效果圖。

二，工程圖。

三，代碼。

RootViewController.m

#import "RootViewController.h"@interface RootViewController ()@end@implementation RootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self; }- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view.//UIViewUIView *view=[[UIView alloc]initWithFrame:CGRectMake(50, 100, 200, 50)];view.backgroundColor=[UIColor redColor];[self.view addSubview:view];//在UIImageView中顯示截取的圖片UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(50, 200, 200, 100)];imageView.image=[self screenShotView:view];[self.view addSubview:imageView]; } #pragma -mark -functions // 對指定視圖進行截圖 - (UIImage *)screenShotView:(UIView *)view {UIImage *imageRet = nil;if (view){if(UIGraphicsBeginImageContextWithOptions){UIGraphicsBeginImageContextWithOptions(view.frame.size, NO, 0.0);}else{UIGraphicsBeginImageContext(view.frame.size);}//獲取圖像[view.layer renderInContext:UIGraphicsGetCurrentContext()];imageRet = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();}else{}return imageRet; }- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated. }

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轉載于:https://www.cnblogs.com/yang-guang-girl/p/5174427.html

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