iOS多图下载案例（一）

没有优化前

#import"ViewController.h"

#import"App.h"

@interfaceViewController()

@property(nonatomic,strong)NSArray*apps;

@end

@implementationViewController

- (NSArray*)apps{

if(_apps==nil) {

NSArray*ary = [NSArrayarrayWithContentsOfFile:[[NSBundlemainBundle]pathForResource:@"apps"ofType:@"plist"]];

NSMutableArray*ary1 = [NSMutableArrayarray];

for(NSDictionary*dicinary) {

[ary1addObject:[AppappWithdic:dic]];

}

_apps= ary1;

}

return_apps;

}

- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section{

returnself.apps.count;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView*)tableView{

return1;

}

- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath{

staticNSString* ID =@"app";

UITableViewCell*cell =[tableViewdequeueReusableCellWithIdentifier:ID];

App*app =_apps[indexPath.row];

cell.textLabel.text= app.name;

cell.detailTextLabel.text=app.download;

//下载图片

NSURL*url = [NSURLURLWithString:app.icon];

NSData*imageData = [NSDatadataWithContentsOfURL:url];

UIImage*image = [UIImageimageWithData:imageData];

cell.imageView.image=image;

returncell;

}

//UI很不流畅-》开子线程下载

//图片重复下载-》缓存

@end

#import

@interfaceApp :NSObject

@property(nonatomic,strong)NSString*name;

@property(nonatomic,strong)NSString*icon;

@property(nonatomic,strong)NSString*download;

+(instancetype)appWithdic:(NSDictionary*)dic;

@end

#import "App.h"

@implementation App

+(instancetype)appWithdic:(NSDictionary *)dic{

App *app = [[App alloc]init];

//KVC

[app setValuesForKeysWithDictionary:dic];

return app;

}

@end