【实例简介】

【实例截图】

【核心代码】

// UIAlertView AFNetworking.m

// Copyright (c) 2011–2015 Alamofire Software Foundation (http://alamofire.org/)

//

// Permission is hereby granted, free of charge, to any person obtaining a copy

// of this software and associated documentation files (the "Software"), to deal

// in the Software without restriction, including without limitation the rights

// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

// copies of the Software, and to permit persons to whom the Software is

// furnished to do so, subject to the following conditions:

//

// The above copyright notice and this permission notice shall be included in

// all copies or substantial portions of the Software.

//

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

// THE SOFTWARE.

#import "UIAlertView AFNetworking.h"

#if defined(__IPHONE_OS_VERSION_MIN_REQUIRED)

#import "AFURLConnectionOperation.h"

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000

#import "AFURLSessionManager.h"

#endif

static void AFGetAlertViewTitleAndMessageFromError(NSError *error, NSString * __autoreleasing *title, NSString * __autoreleasing *message) {

if (error.localizedDescription && (error.localizedRecoverySuggestion || error.localizedFailureReason)) {

*title = error.localizedDescription;

if (error.localizedRecoverySuggestion) {

*message = error.localizedRecoverySuggestion;

} else {

*message = error.localizedFailureReason;

}

} else if (error.localizedDescription) {

*title = NSLocalizedStringFromTable(@"Error", @"AFNetworking", @"Fallback Error Description");

*message = error.localizedDescription;

} else {

*title = NSLocalizedStringFromTable(@"Error", @"AFNetworking", @"Fallback Error Description");

*message = [NSString stringWithFormat:NSLocalizedStringFromTable(@"%@ Error: %ld", @"AFNetworking", @"Fallback Error Failure Reason Format"), error.domain, (long)error.code];

}

}

@implementation UIAlertView (AFNetworking)

#if __IPHONE_OS_VERSION_MIN_REQUIRED >= 70000

(void)showAlertViewForTaskWithErrorOnCompletion:(NSURLSessionTask *)task

delegate:(id)delegate

{

[self showAlertViewForTaskWithErrorOnCompletion:task delegate:delegate cancelButtonTitle:NSLocalizedStringFromTable(@"Dismiss", @"AFNetworking", @"UIAlertView Cancel Button Title") otherButtonTitles:nil, nil];

}

(void)showAlertViewForTaskWithErrorOnCompletion:(NSURLSessionTask *)task

delegate:(id)delegate

cancelButtonTitle:(NSString *)cancelButtonTitle

otherButtonTitles:(NSString *)otherButtonTitles, ... NS_REQUIRES_NIL_TERMINATION

{

NSMutableArray *mutableOtherTitles = [NSMutableArray array];

va_list otherButtonTitleList;

va_start(otherButtonTitleList, otherButtonTitles);

{

for (NSString *otherButtonTitle = otherButtonTitles; otherButtonTitle != nil; otherButtonTitle = va_arg(otherButtonTitleList, NSString *)) {

[mutableOtherTitles addObject:otherButtonTitle];

}

}

va_end(otherButtonTitleList);

__block __weak id observer = [[NSNotificationCenter defaultCenter] addObserverForName:AFNetworkingTaskDidCompleteNotification object:task queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notification) {

NSError *error = notification.userInfo[AFNetworkingTaskDidCompleteErrorKey];

if (error) {

NSString *title, *message;

AFGetAlertViewTitleAndMessageFromError(error, &title, &message);

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:delegate cancelButtonTitle:cancelButtonTitle otherButtonTitles:nil, nil];

for (NSString *otherButtonTitle in mutableOtherTitles) {

[alertView addButtonWithTitle:otherButtonTitle];

}

[alertView setTitle:title];

[alertView setMessage:message];

[alertView show];

}

[[NSNotificationCenter defaultCenter] removeObserver:observer];

}];

}

#endif

#pragma mark -

(void)showAlertViewForRequestOperationWithErrorOnCompletion:(AFURLConnectionOperation *)operation

delegate:(id)delegate

{

[self showAlertViewForRequestOperationWithErrorOnCompletion:operation delegate:delegate cancelButtonTitle:NSLocalizedStringFromTable(@"Dismiss", @"AFNetworking", @"UIAlertView Cancel Button Title") otherButtonTitles:nil, nil];

}

(void)showAlertViewForRequestOperationWithErrorOnCompletion:(AFURLConnectionOperation *)operation

delegate:(id)delegate

cancelButtonTitle:(NSString *)cancelButtonTitle

otherButtonTitles:(NSString *)otherButtonTitles, ... NS_REQUIRES_NIL_TERMINATION

{

NSMutableArray *mutableOtherTitles = [NSMutableArray array];

va_list otherButtonTitleList;

va_start(otherButtonTitleList, otherButtonTitles);

{

for (NSString *otherButtonTitle = otherButtonTitles; otherButtonTitle != nil; otherButtonTitle = va_arg(otherButtonTitleList, NSString *)) {

[mutableOtherTitles addObject:otherButtonTitle];

}

}

va_end(otherButtonTitleList);

__block __weak id observer = [[NSNotificationCenter defaultCenter] addObserverForName:AFNetworkingOperationDidFinishNotification object:operation queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification *notification) {

if (notification.object && [notification.object isKindOfClass:[AFURLConnectionOperation class]]) {

NSError *error = [(AFURLConnectionOperation *)notification.object error];

if (error) {

NSString *title, *message;

AFGetAlertViewTitleAndMessageFromError(error, &title, &message);

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:delegate cancelButtonTitle:cancelButtonTitle otherButtonTitles:nil, nil];

for (NSString *otherButtonTitle in mutableOtherTitles) {

[alertView addButtonWithTitle:otherButtonTitle];

}

[alertView setTitle:title];

[alertView setMessage:message];

[alertView show];

}

}

[[NSNotificationCenter defaultCenter] removeObserver:observer];

}];

}

@end

#endif