Use Uiimageview to show pictures from the web

This article reprinted to http://www.cnblogs.com/chivas/archive/2012/05/21/2512324.html

Uiimageview: You can assign a picture to Uiimageview by uiimage loading, you can specify the location and size of the display after loading.

1. Initialization

Uiimageview *imageview = [[Uiimageview alloc] Initwithframe:cgrectmake (0.0,45.0,300,300)];

Imageview.image = [UIImage imagenamed:@ "a.png"];//load into picture

[Self.view Addsubview:image];

[ImageView release];

The Imagenamed method is not able to load a picture through a path, which can cause a memory warning to cause an automatic exit problem.

It is best to solve this problem by directly reading the file path [UIImage imagewithcontentsoffile] .

Nsimage *image = [[Nsimage alloc]initwithcontentsofurl: (Nsurl *)];

Nsimage *image = [[Nsimage alloc]initwithcontentsoffile: (NSString *)];

Such as:

1, ""

UIImage *image = [[UIImage alloc] initwithdata:[nsdata datawithcontentsofurl:[nsurl urlwithstring:@ "/http/ Farm4.static.flickr.com/3092/2915896504_a88b69c9de.jpg "]];

Uiimageview *imageview = [[Uiimageview alloc] initwithimage:image];

2, ""

Nsstring *path = [[NSBundle mainbundle]pathforresource:@ "icon" oftype:@ "PNG"];

Nsimage *myimage = [UIImage Imagewithcontentsoffile:path];

let a uiimageview respond to a click event

Uiimageview *imgview =[[uiimageview alloc] Initwithframe:cgrectmake (0, 0,320, 44)];
Imgview.userinteractionenabled=yes;
UITapGestureRecognizer *singletap =[[uitapgesturerecognizeralloc]initwithtarget:selfaction: @selector ( Onclickimage)];
[Imgview Addgesturerecognizer:singletap];
[Singletap release];



-(void) onclickimage{
Here, does whatever you wantto do
NSLog (@ "ImageView is clicked!");
}

Use Uiimageview to show pictures from the web