可可触摸-以编程方式添加UIImageView吗？ [英] Cocoa Touch - Adding a UIImageView programmatically?

问题描述

如何在Objective-c中创建和放置新的图像视图？

How can I create and position a new imageview in objective-c?

谢谢！

I尝试过这个但是它似乎没有任何作用...

I tried this but it doesnt seem to do anything...

-(void)drawStars{ //uses random numbers to display a star on screen
    //create random position
    int xCoordinate = arc4random() % 10;
    int yCoordinate = arc4random() % 10;

    UIImageView *starImgView = [[UIImageView alloc] initWithFrame:CGRectMake(xCoordinate, yCoordinate, 58, 40)]; //create ImageView 

    starImgView.image = [UIImage imageNamed:@"star.png"];


    [starImgView release];

我将此方法放在了我的视图控制器中。我看到一些CG东西需要导入核心图形或其他东西吗？ （反正核心图形是什么？）

I placed this method in my viewcontroller. I see some CG stuff do I need to import core graphics or something? (what is core graphics anyway?)

推荐答案

您正在询问iPhone图像视图。对？然后尝试这个

You are asking about iPhone image view. Right? Then try this

UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 10, 100, 50)];

这将创建100 x 50尺寸的图像视图，并定位（10，10）父视图。

This will create an image view of 100 x 50 dimension and locating (10, 10) of parent view.

检查参考手册中的 UIImageView 和 UIView 。您可以使用 image 属性。

Check the reference manual for UIImageView and UIView. You can set an image by using image property of imageView.

imgView.image = [UIImage imageNamed:@"a_image.png"];

，您可以使用 contentMode 属性可配置如何在视图中放置图像。例如，您可以使用

And you can use the contentMode property of UIView to configure how to fit the image in the view. For example you can use

imgView.contentMode = UIViewContentModeCenter

将所需的图像放置在视图的中心。列出了可用的contentModes 此处

to place the desired image to the center of the view. The available contentModes are listed here

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