#import "ViewController.h"@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIButton *questionImageBtn;
@property (strong, nonatomic) UIButton *mask;
@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];// Do any additional setup after loading the view, typically from a nib.
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}//解决状态栏黑掉的方法
- (UIStatusBarStyle)preferredStatusBarStyle
{return UIStatusBarStyleLightContent;
}- (UIButton *)mask
{if (_mask == nil) {//1,新增一个蒙版_mask = [[UIButton alloc] initWithFrame:self.view.bounds];//背景色及其透明度_mask.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.5];//0.5是颜色的透明度_mask.alpha = 0;[_mask addTarget:self action:@selector(smallImage) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:_mask];}return _mask;
}
//放大或者缩小图片
- (IBAction)bigImage:(id)sender {if (self.mask.alpha == 0) {//放大图片//1,显示蒙版self.mask.alpha = 1;//2,将图片放到最外层[self.view bringSubviewToFront:self.questionImageBtn];//3,放大图片NSInteger bigImageWith = self.view.bounds.size.width;NSInteger bigImageHeight = bigImageWith;NSInteger bitImageX = 0;NSInteger bigImageY = (self.view.bounds.size.height-bigImageHeight)*0.5;[UIView animateWithDuration:1 animations:^{self.questionImageBtn.frame = CGRectMake(bitImageX, bigImageY, bigImageWith, bigImageHeight);}];}else{//缩小图片[self smallImage];}}- (void)smallImage
{[UIView animateWithDuration:1 animations:^{//1,图片回到初始状态self.questionImageBtn.frame = CGRectMake(85, 98, 150, 150);} completion:^(BOOL finished) {//2,蒙版透明度变为0[UIView animateWithDuration:1 animations:^{self.mask.alpha = 0;}];}];
}@end