GCD large central Distribution simple application Example

@interface Viewcontroller ()

{

Uiimageview* IV;

uibutton* btn;

Uilabel* LBL;

}

@end

@implementation Viewcontroller

-(void) Viewdidload {

[Super Viewdidload];

Iv=[[uiimageview alloc]initwithframe:cgrectmake (0, 0, 100, 100)];

Lbl=[[uilabel alloc]initwithframe:cgrectmake (0, 100, 100, 30)];

Btn=[[uibutton alloc]initwithframe:cgrectmake (0, 130, 100, 30)];

[Btn addtarget:self Action: @selector (LoadData) forcontrolevents:uicontroleventtouchupinside];

Btn.backgroundcolor=[uicolor Orangecolor];

[Self.view Addsubview:iv];

[Self.view ADDSUBVIEW:LBL];

[Self.view ADDSUBVIEW:BTN];

}

-(void) LoadData

{

Dispatch_async (Dispatch_get_global_queue (dispatch_queue_priority_high, 0), ^{

nsstring* [email protected] "http://f4.topitme.com/4/e4/5e/1132253263b8b5ee44o.jpg";

nsdata* data=[[nsdata Alloc]initwithcontentsofurl:[nsurl Urlwithstring:url];

uiimage* Image=[[uiimage Alloc]initwithdata:data];

if (image) {

Dispatch_async (Dispatch_get_main_queue (), ^{

self->iv.image=image;

});

}

Else

{

NSLog (@ "Download error");

}

});

Dispatch_async (Dispatch_get_global_queue (dispatch_queue_priority_high, 0), ^{

nsstring* [email protected] "123";

if (str) {

Dispatch_async (Dispatch_get_main_queue (), ^{

self->lbl.text=str;

});

}

Else

{

NSLog (@ "Download error");

}

});

}

GCD large central Distribution simple application Example