For the iOS asynchronous image view, select learning IOS programming source code, a good reference.

JBAsyncImageView
JBAsyncImageView.xcodeproj
..........................\project.pbxproj
..........................\project.xcworkspace
..........................\...................\contents.xcworkspacedata
..........................\...................\xcuserdata
..........................\...................\..........\jessebunch.xcuserdatad
..........................\...................\..........\......................\UserInterfaceState.xcuserstate
..........................\xcuserdata
..........................\..........\jessebunch.xcuserdatad
..........................\..........\......................\xcdebugger
..........................\..........\......................\..........\Breakpoints.xcbkptlist
..........................\..........\......................\xcschemes
..........................\..........\......................\.........\JBAsyncImageView.xcscheme
..........................\..........\......................\.........\xcschememanagement.plist
................\AppDelegate.h
................\AppDelegate.m
................\en.lproj
................\........\InfoPlist.strings
................\........\ViewController_iPad.xib
................\........\ViewController_iPhone.xib
................\JBAsyncImageView-Info.plist
................\JBAsyncImageView-Prefix.pch
................\main.m
................\ViewController.h
................\ViewController.m
readme.md
Source
......\JBAsyncImageView.h
......\JBAsyncImageView.m

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