在UIImageView中显示图像数组 [英] Display array of Images in UIImageView

问题描述

添加到Project中的图像数组

array of images added into Project

成像是 UIImageView 而imagg是图像由用户选择其默认值
_imaging.image = imagg;

imaging is the UIImageView and imagg is Image choosen by user its default _imaging.image=imagg;

    arr = [NSArray arrayWithObjects:
                        [UIImage imageNamed:@"1.jpg"],
                        [UIImage imageNamed:@"2.jpeg"],
                        [UIImage imageNamed:@"3.jpeg"],
                        [UIImage imageNamed:@"4.jpeg"],
                        [UIImage imageNamed:@"5.jpeg"],
              nil];

假设用户选择了第三张图像，即3.jpeg我在imageview中显示3.jpeg。然后分别使用两个按钮操作下一步和上一页下一张或上一张图像3.jpeg应显示。

assume user selected third image i.e 3.jpeg i am showing the 3.jpeg in imageview. Then using two button actions respectively Next and Previous next or previous images 3.jpeg should display.

   - (IBAction)previous:(id)sender {

    ////

    }

- (IBAction)next:(id)sender {

 //////
 }

}

对于下一个动作，它从第2张图片开始，即使是之前的动作，也是从第1张图片开始。

for the next action its starting from 2nd image even for previous action its starting from 1st image.

推荐答案

这是一个简单的概念，这是静态方法，但工作正常

this is the simple concept, this is working in static method, but working fine

分配一个全局变量

@property (strong,nonatomic) NSString *imagestr;


- (IBAction)previous:(id)sender {


int str=[imagestr integerValue];

NSLog(@"the int value==%d",str);
switch (str) {
    case 0:
        _imaging.image=[arr objectAtIndex:4];
        imagestr=@"4";
        break;
    case 1:
        _imaging.image=[arr objectAtIndex:0];
        imagestr=@"0";
        break;
    case 2:
        _imaging.image=[arr objectAtIndex:1];
        imagestr=@"1";
        break;
    case 3:
        _imaging.image=[arr objectAtIndex:2];
        imagestr=@"2";
        break;
    case 4:
        _imaging.image=[arr objectAtIndex:3];
        imagestr=@"3";
        break;


    default:
        break;

}
}

- (IBAction)next:(id)sender {



int str=[imagestr integerValue];

NSLog(@"the int value==%d",str);
switch (str) {
    case 0:
        _imaging.image=[arr objectAtIndex:1];
        imagestr=@"1";
        break;
    case 1:
        _imaging.image=[arr objectAtIndex:2];
         imagestr=@"2";
        break;
    case 2:
        _imaging.image=[arr objectAtIndex:3];
         imagestr=@"3";
        break;
    case 3:
        _imaging.image=[arr objectAtIndex:4];
         imagestr=@"4";
        break;
    case 4:
        _imaging.image=[arr objectAtIndex:0];
         imagestr=@"0";
        break;


    default:
        break;
}



 }

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