IOS入门之网络请求
- (void)getPath:(NSString *)path
parameters:(NSDictionary *)parameters
success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
NSURLRequest *request = [self requestWithMethod:@"GET" path:path parameters:parameters];
AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:success failure:failure];
[self enqueueHTTPRequestOperation:operation];
}
- (void)postPath:(NSString *)path
parameters:(NSDictionary *)parameters
success:(void (^)(AFHTTPRequestOperation *operation, id responseObject))success
failure:(void (^)(AFHTTPRequestOperation *operation, NSError *error))failure
{
NSURLRequest *request = [self requestWithMethod:@"POST" path:path parameters:parameters];
AFHTTPRequestOperation *operation = [self HTTPRequestOperationWithRequest:request success:success failure:failure];
[self enqueueHTTPRequestOperation:operation];
}
AFHTTPRequestOperation#responseString
TBXML *xml = [[TBXML alloc] initWithXMLString:raw_stringerror:nil]; TBXMLElement *element = [TBXMLchildElementNamed:@"child_name"parentElement:parent]; [TBXML nextSiblingNamed:@"element_name" searchFromElement:element] text = [TBXML textForElement : element]
NSNotificationCenter的使用
NSNotificationCenter作用类似与Android中广播
+ (instancetype)defaultCenter; - (instancetype)init; /* designated initializer */ - (void)addObserver:(id)observer selector:(SEL)aSelector name:(NSString *)aName object:(id)anObject; - (void)postNotification:(NSNotification *)notification; - (void)postNotificationName:(NSString *)aName object:(id)anObject; - (void)postNotificationName:(NSString *)aName object:(id)anObject userInfo:(NSDictionary *)aUserInfo; - (void)removeObserver:(id)observer; - (void)removeObserver:(id)observer name:(NSString *)aName object:(id)anObject;
eg:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(mytest:) name:@" mytest" object:nil];
[[NSNotificationCenter defaultCenter] postNotificationName:@"mytest" object:searchFriendArray];
dispatch_once 实现单例
+ (AFOSCClient *)sharedClient {
static AFOSCClient *_sharedClient = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_sharedClient = [[AFOSCClient alloc] initWithBaseURL:[NSURL URLWithString:kAFUrl]];
[_sharedClient setDefaultHeader:@"User-Agent" value:[NSString stringWithFormat:@"%@/%@", [Tool getOSVersion], [Config Instance].getIOSGuid]];
});
return _sharedClient;
}
简单数据存储
NSUserDefaults * setting = [NSUserDefaults standardUserDefaults]; [setting setObject:str forKey:key]; [setting synchronize];
异步加载图片
EGOImagView
EGOImageView *imageView = [[EGOImageView alloc] initWithPlaceholderImage:[UIImage imageNamed:@"placeholder.png"]]; imageView.imageURL = [NSURL URLWithString:str]; imageView.frame = CGRectMake(4.0f, 4.0f, 36.0f, 36.0f); [self.view addSubView:imageView];