多值参数
如果一个参数对应着多个值，那么直接按照"参数=值&参数=值"的方式拼接
-
多值参数的写法
//错误的写法: http://120.25.226.186:32812/weather?place=Beijing&guangzhou
//正确的写法: http://120.25.226.186:32812/weather?place=Beijing&place=guangzhou
示例代码:
-(void)test
{
//1.确定URL
NSURL *url = [NSURL URLWithString:@"http://120.25.226.186:32812/weather?place=Beijing&place=Guangzhou"];
//2.创建请求对象
NSURLRequest *request = [NSURLRequest requestWithURL:url];
//3.发送请求
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse * _Nullable response, NSData * _Nullable data, NSError * _Nullable connectionError) {
//4.解析
NSLog(@"%@",[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]);
}];
}
中文输出
- 如何解决字典和数组中输出乱码的问题
给字典和数组添加一个分类，重写descriptionWithLocale方法，在该方法中拼接元素格式化输出。
-(nonnull NSString *)descriptionWithLocale:(nullable id)locale
示例代码:- 重写字典的
descriptionWithLocale方法
- 重写字典的
#import "NSDictionary+log.h"
@implementation NSDictionary (log)
//重写字典的descriptionWithLocale:indent:方法,实现中文的输出
-(NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level
{
//创建一个可变字符串,用于拼接输出的内容
NSMutableString * strM = [NSMutableString string];
[strM appendString:@"\t{\n"];
//使用迭代法遍历字典中的键值对
[self enumerateKeysAndObjectsUsingBlock:^(id _Nonnull key, id _Nonnull obj, BOOL * _Nonnull stop) {
[strM appendFormat:@"\t%@:",key];
[strM appendFormat:@"%@,\n",obj];
}];
[strM appendString:@"\t}"];
//删除最后一个逗号
NSRange range = [strM rangeOfString:@"," options:NSBackwardsSearch];
if (range.location != NSNotFound) {
[strM deleteCharactersInRange:range];
}
return strM;
}
@end
- 重写数组的
descriptionWithLocale方法
@implementation NSArray (log)
//重写数组的descriptionWithLocale:indent方法
-(NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level
{
NSMutableString * strM = [NSMutableString string];
[strM appendString:@"\t[\n"];
//用迭代法遍历数组
[self enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
[strM appendFormat:@"%@,\n",obj];
}];
[strM appendString:@"\t]"];
//删除最后一个逗号
NSRange range = [strM rangeOfString:@"," options:NSBackwardsSearch];
if (range.location != NSNotFound) {
[strM deleteCharactersInRange:range];
}
return strM;
}
@end
