iOS放大镜例子，用View类实现

来源：互联网发布：软件开发兼职网编辑：程序博客网时间：2024/04/29 10:38

之前传过一个用window类实现的，但在实际项目中用多个window会出现一些不必要的冲突。所以用View重新实现一个。

例子：http://download.csdn.net/detail/qqmcy/7025253

ViewController.h

////  ViewController.h//  放大镜例子////  Created by 杜甲 on 14-3-10.//  Copyright (c) 2014年 杜甲. All rights reserved.//#import <UIKit/UIKit.h>#import "MagnifierV.h"@interface ViewController : UIViewController@property (strong , nonatomic) MagnifierV* magnifier;@end

ViewController.m

////  ViewController.m//  放大镜例子////  Created by 杜甲 on 14-3-10.//  Copyright (c) 2014年 杜甲. All rights reserved.//#import "ViewController.h"@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.        UIImageView* image = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"changmen.jpg"]];    image.frame  = CGRectMake(0, 0, 320, 548);    [self.view addSubview:image];            /*要将放大镜视图最后 addSubview 到视图中*/    self.magnifier = [[MagnifierV alloc] initWithFrame:CGRectMake(0, 0, 80, 80)];    self.magnifier.viewToMagnify = self.view;    [self.view addSubview:self.magnifier];        self.magnifier.hidden = YES;}- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {        self.magnifier.hidden = NO;        UITouch* touch = [touches anyObject];    CGPoint point = [touch locationInView:self.view];    self.magnifier.touchPoint = point;    [self.magnifier setNeedsDisplay];    }- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {[self handleAction:touches];}- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {self.magnifier.hidden = YES;}- (void)handleAction:(id)timerObj {NSSet *touches = timerObj;UITouch *touch = [touches anyObject];       CGPoint point =[touch locationInView:self.view];    self.magnifier.touchPoint = point;[self.magnifier setNeedsDisplay];}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end

0 0