【移動(dòng)應(yīng)用開發(fā)技術(shù)】iOS中如何實(shí)現(xiàn)設(shè)置清除緩存功能

【移動(dòng)應(yīng)用開發(fā)技術(shù)】iOS中如何實(shí)現(xiàn)設(shè)置清除緩存功能

/upload/information/20200623/126/121396.png具體步驟1.創(chuàng)建自定義Cell，命名為GYLClearCacheCell-

(instancetype)initWithStyle:(UITableViewCellStyle)style

reuseIdentifier:(NSString

*)reuseIdentifier

{

if

(self

=

[super

initWithStyle:style

reuseIdentifier:reuseIdentifier])

{

//

設(shè)置加載視圖

UIActivityIndicatorView

*loadingView

=

[[UIActivityIndicatorView

alloc]

initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];

[loadingView

startAnimating];

self.accessoryView

=

loadingView;

//設(shè)置文字

self.textLabel.text

=

@"清楚緩存";

self.detailTextLabel.text

=

@"正在計(jì)算";

}

return

self;

}2.計(jì)算緩存文件大小unsigned

long

long

size

=

[NSSearchPathForDirectoriesInDomains(NSCachesDirectory,

NSUserDomainMask,

YES).lastObject

stringByAppendingPathComponent:@"CustomFile"].fileSize;

//fileSize是封裝在Category中的。

size

+=

[SDImageCache

sharedImageCache].getSize;

//CustomFile

+

SDWebImage

緩存

//設(shè)置文件大小格式

NSString

sizeText

=

nil;

if

(size

>=

pow(10,

9))

{

sizeText

=

[NSString

stringWithFormat:@"%.2fGB",

size

/

pow(10,

9)];

}else

if

(size

>=

pow(10,

6))

{

sizeText

=

[NSString

stringWithFormat:@"%.2fMB",

size

/

pow(10,

6)];

}else

if

(size

>=

pow(10,

3))

{

sizeText

=

[NSString

stringWithFormat:@"%.2fKB",

size

/

pow(10,

3)];

}else

{

sizeText

=

[NSString

stringWithFormat:@"%zdB",

size];

}3.添加手勢監(jiān)聽//計(jì)算完成后，回到主線程繼續(xù)處理，顯示文件大小，除去加載視圖，顯示箭頭，添加點(diǎn)擊事件

dispatch_async(dispatch_get_main_queue(),

^{

self.detailTextLabel.text

=

[NSString

stringWithFormat:@"%@",sizeText];

self.accessoryView

=

nil;

self.accessoryType

=

UITableViewCellAccessoryDisclosureIndicator;

[self

addGestureRecognizer:[[UITapGestureRecognizer

alloc]

initWithTarget:self

action:@selector(clearCacheClick)]];

});4.清除緩存-

(void)clearCacheClick

{

[SVProgressHUD

showWithStatus:@"正在清除緩存···"];

[SVProgressHUD

setDefaultMaskType:SVProgressHUDMaskTypeBlack];

[[SDImageCache

sharedImageCache]

clearDiskOnCompletion:^{

dispatch_async(dispatch_get_global_queue(0,

0),

^{

NSFileManager

*mgr

=

[NSFileManager

defaultManager];

[mgr

removeItemAtPath:GYLCustomFile

error:nil];

[mgr

createDirectoryAtPath:GYLCustomFile

withIntermediateDirectories:YES

attributes:nil

error:nil];

dispatch_async(dispatch_get_main_queue(),

^{

[SVProgressHUD

dismiss];

//

設(shè)置文字

self.detailTextLabel.text

=

nil;

});

});

}];

}5.其他注意點(diǎn)6.使用#import

"GYLSettingViewController.h"

#import

"GYLClearCacheCell.h"

@implementation

GYLSettingViewController

static

NSString

*

const

GYLClearCacheCellID

=

@"ClearCache";

static

NSString

*

const

GYLSettingCellID

=

@"Setting";

-

(instancetype)init

{

return

[self

initWithStyle:UITableViewStyleGrouped];

}

-

(void)viewDidLoad

{

[super

viewDidLoad];

self.view.backgroundColor

=

GYLBGColor;

self.navigationItem.title

=

@"設(shè)置";

[self.tableView

registerClass:[GYLClearCacheCell

class]

forCellReuseIdentifier:GYLClearCacheCellID];

[self.tableView

registerClass:[UITableViewCell

class]

forCellReuseIdentifier:GYLSettingCellID];

}

-

(NSInteger)numberOfSectionsInTableView:(UITableView

*)tableView

{

return

3;

}

-

(NSInteger)tableView:(UITableView

*)tableView

numberOfRowsInSection:(NSInteger)section

{

return

1;

}

-

(UITableViewCell

*)tableView:(UITableView

*)tableView

cellForRowAtIndexPath:(NSIndexPath

*)indexPath

{

if

(indexPath.section

==

0

&&

indexPath.row

==

0)

{

return

[[GYLClearCacheCell

alloc]

initWithStyle:UITableViewCellStyleValue1

reuseIdentifier:GYLClearCacheCellID];

}

UITableViewCell

*cell

=

[tableView

dequeueReusableCellWithIdentifier:GYLSettingCellID];

cell.textLabel.text

=

[NSString

stringWithFormat:@"section-%zd,row--%zd",inde