//将字典转成json字符串
+ (NSString*)convertToJSONData:(id)infoDict
{
NSError*error;
NSData*jsonData = [NSJSONSerializationdataWithJSONObject:infoDict
options:NSJSONWritingPrettyPrinted// Pass 0 if you don't care about the readability of the generated string
error:&error];
NSString*jsonString =@"";
if(! jsonData)
{
NSLog(@"Got an error: %@", error);
}else
{
jsonString = [[NSStringalloc]initWithData:jsonDataencoding:NSUTF8StringEncoding];
}
jsonString = [jsonStringstringByTrimmingCharactersInSet:[NSCharacterSetwhitespaceAndNewlineCharacterSet]];//去除掉首尾的空白字符和换行字符
[jsonStringstringByReplacingOccurrencesOfString:@"\n"withString:@""];
returnjsonString;
}
//截取最大长度的字符串不够的补全
+(NSString*)finalText:(NSString*)string
{
NSString*string1=string;
NSStringEncodingenc =CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSData*data = [string1dataUsingEncoding:enc];
if(data.length>12) {
data = [datasubdataWithRange:NSMakeRange(0,12)];
string1 = [[NSStringalloc]initWithData:dataencoding:enc];
if(!string1) {
data = [datasubdataWithRange:NSMakeRange(0,12-1)];
string1 = [[NSStringalloc]initWithData:dataencoding:enc];
}
string1 = [string1stringByAppendingString:@""];
returnstring1;
}
else
{
for(inta=0; a<12-data.length; a++)
{
string=[NSStringstringWithFormat:@"%@%s",string," "];
}
returnstring;
}
}
#pragma mark - 截取字符串
+(NSString*)finalText:(NSString*)string maxChar:(int)maxChar
{
NSString*string1=string;
NSStringEncodingenc =CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingGB_18030_2000);
NSData*data = [string1dataUsingEncoding:enc];
if(data.length> maxChar) {
data = [datasubdataWithRange:NSMakeRange(0, maxChar)];
string1 = [[NSStringalloc]initWithData:dataencoding:enc];
if(!string1) {
data = [datasubdataWithRange:NSMakeRange(0, maxChar -1)];
string1 = [[NSStringalloc]initWithData:dataencoding:enc];
}
string1 = [string1stringByAppendingString:@""];
}
returnstring1;
}
