此處的圖片控件，我用的是UIButton，因爲它自身有點擊事件，不過UIImageView同理，爲其添加手勢即可實現同樣的效果。
//
// ServiceResultViewController.m
// Created by msk on 16/3/7.
//
#import "ServiceResultViewController.h"
static CGRect oldframe;//用於記錄按鈕放大之前的frame
@interface ServiceResultViewController ()<UIScrollViewDelegate>{
UIView *imgView;//展示圖片的父視圖
NSMutableArray *imagesArray;//存儲圖片
CATransition *animation;//縮放動畫效果
CGFloat scaleNum;//圖片放大倍數
}
@property(nonatomic,strong)UIScrollView *scrollview;//用於捏合放大與縮小的scrollView
@property(nonatomic,strong)UIButton *imgButton;//顯示圖片的按鈕
@end
@implementation ServiceResultViewController
#pragma mark - 獲取圖片
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor=[UIColor whiteColor];
imagesArray=[NSMutableArray array];
//獲取網絡圖片並存入到imagesArray中的代碼，放到此處,此處以本地圖片爲例
for (int i=0; i<5; i++) {
UIImage *image=[UIImage imageNamed:@"default_head"];
[imagesArray addObject:image];
}
//然後進行視圖的佈局,進行圖片的顯示
NSInteger rows =imagesArray.count%3==0?imagesArray.count/3:imagesArray.count/3+1;
CGFloat height = ((WIDTH -20)/3)+2.5;
imgView = [[UIView alloc]initWithFrame:CGRectMake(0,64,WIDTH, (10+(5+height)*rows))];
[self.view addSubview:imgView];
[selfloadImageShowOnView];
}
#pragma mark - 展示圖片
-(void)loadImageShowOnView{
CGRect aRect, bRect, bounds = CGRectMake(2.5, 10, imgView.bounds.size.width,10000000);
NSInteger rows =imagesArray.count%3==0?imagesArray.count/3:imagesArray.count/3+1;
for (int i =0; i<rows; i++) {
DivideWithPadding(bounds, &aRect, &bounds,90,5,CGRectMinYEdge);
for (int m =0; m<3; m++) {
NSInteger index = i * 3 + m;
if (index >= imagesArray.count) {
return;
}
DivideWithPadding(aRect, &bRect, &aRect, bounds.size.width/3-5,5,CGRectMinXEdge);
UIImage *img= [imagesArray objectAtIndex:index];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
button.frame = bRect;
[button setImage:imgforState:UIControlStateNormal];
[button addTarget:self action:@selector(enlargeImage:) forControlEvents:UIControlEventTouchUpInside];
button.exclusiveTouch =YES;//禁止兩個按鈕同時被點擊，引起圖片顯示錯亂現象發生
[imgView addSubview:button];
}
}
}
#pragma mark - 放大圖片
-(void)enlargeImage:(UIButton *)button{
scaleNum=1;
UIWindow *window=[UIApplication sharedApplication].keyWindow;
UIView *backgroundView=[[UIView alloc]initWithFrame:CGRectMake(0,0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height)];
oldframe=[button convertRect:button.bounds toView:imgView];
backgroundView.backgroundColor=[UIColor blackColor];
backgroundView.alpha=0;
button.tag=1;
//添加捏合手勢，放大與縮小圖片
self.scrollview=[[UIScrollView alloc]initWithFrame:backgroundView.bounds];
self.imgButton=button;
[self.scrollview addSubview:button];
//設置UIScrollView的滾動範圍和圖片的真實尺寸一致
self.scrollview.contentSize=button.frame.size;
//設置實現縮放
//設置代理scrollview的代理對象
self.scrollview.delegate=self;
//設置最大伸縮比例
self.scrollview.maximumZoomScale=3;
//設置最小伸縮比例
self.scrollview.minimumZoomScale=1;
[self.scrollview setZoomScale:1animated:NO];
self.scrollview.scrollsToTop =NO;
self.scrollview.scrollEnabled =YES;
self.scrollview.showsHorizontalScrollIndicator=NO;
self.scrollview.showsVerticalScrollIndicator=NO;
[backgroundView addSubview:self.scrollview];
[window addSubview:backgroundView];
//單擊手勢
UITapGestureRecognizer *singleTapGesture = [[UITapGestureRecognizer alloc]initWithTarget:selfaction:@selector(handleSingleTap:)];
singleTapGesture.numberOfTapsRequired = 1;
singleTapGesture.numberOfTouchesRequired =1;
[backgroundView addGestureRecognizer:singleTapGesture];
//雙擊手勢
UITapGestureRecognizer *doubleTapGesture = [[UITapGestureRecognizer alloc]initWithTarget:selfaction:@selector(handleDoubleTap:)];
doubleTapGesture.numberOfTapsRequired = 2;
doubleTapGesture.numberOfTouchesRequired =1;
[backgroundView addGestureRecognizer:doubleTapGesture];
[singleTapGesture requireGestureRecognizerToFail:doubleTapGesture];
[UIViewanimateWithDuration:0.3animations:^{
button.frame=CGRectMake(0,([UIScreen mainScreen].bounds.size.height-(button.frame.size.height*[UIScreen mainScreen].bounds.size.width/button.frame.size.width+80))/2, [UIScreen mainScreen].bounds.size.width, button.frame.size.height*[UIScreen mainScreen].bounds.size.width/button.frame.size.width+80);
backgroundView.alpha=1;
} completion:^(BOOL finished) {
button.userInteractionEnabled=NO;
}];
}
#pragma mark - 還原圖片
-(void)hideImage:(UITapGestureRecognizer*)tap{
UIView *backgroundView=tap.view;
UIButton *button=(UIButton *)[tap.viewviewWithTag:1];
animation = [CATransition animation];
animation.duration =0.2;
animation.timingFunction =UIViewAnimationCurveEaseInOut;
animation.fillMode =kCAFillModeForwards;
animation.type =kCATransition;
backgroundView.alpha=0;
[backgroundView.layer addAnimation:animation forKey:@"animation"];
button.frame=oldframe;
[imgView addSubview:button];
button.userInteractionEnabled=YES;
}
#pragma mark - 處理單擊手勢
-(void)handleSingleTap:(UIGestureRecognizer *)sender{
UITapGestureRecognizer *tap=(UITapGestureRecognizer *)sender;
[self hideImage:tap];
}
#pragma mark - 處理雙擊手勢
-(void)handleDoubleTap:(UIGestureRecognizer *)sender{
if (scaleNum>=1&&scaleNum<=2) {
scaleNum++;
}else{
scaleNum=1;
}
[self.scrollviewsetZoomScale:scaleNumanimated:YES];
}
#pragma mark - UIScrollViewDelegate,告訴scrollview要縮放的是哪個子控件
-(UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
return self.imgButton;
}
#pragma mark - 等比例放大，讓放大的圖片保持在scrollView的中央
- (void)scrollViewDidZoom:(UIScrollView *)scrollView{
CGFloat offsetX = (self.scrollview.bounds.size.width > self.scrollview.contentSize.width)?(self.scrollview.bounds.size.width - self.scrollview.contentSize.width) *0.5 : 0.0;
CGFloat offsetY = (self.scrollview.bounds.size.height > self.scrollview.contentSize.height)?
(self.scrollview.bounds.size.height - self.scrollview.contentSize.height) *0.5 : 0.0;
self.imgButton.center =CGPointMake(self.scrollview.contentSize.width *0.5 + offsetX,self.scrollview.contentSize.height *0.5 + offsetY);
}
#pragma mark - 自動排列圖片
void DivideWithPadding(CGRect rect,CGRect *slice,CGRect *remainder,CGFloat amount,CGFloat padding,CGRectEdge edge) {
CGRect tmpSlice;
CGRectDivide(rect, &tmpSlice, &rect, amount, edge);
if (slice) {
*slice = tmpSlice;
}
CGRectDivide(rect, &tmpSlice, &rect, padding, edge);
if (remainder) {
*remainder = rect;
}
}
- (void)didReceiveMemoryWarning {
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end