// 字典转json字符串方法
-(NSString *)convertToJsonData:(NSDictionary *)dict
{
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString;
if (!jsonData) {
NSLog(@"%@",error);
}else{
jsonString = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];
}
NSMutableString *mutStr = [NSMutableString stringWithString:jsonString];
NSRange range = {0,jsonString.length};
//去掉字符串中的空格
[mutStr replaceOccurrencesOfString:@" " withString:@"" options:NSLiteralSearch range:range];
NSRange range2 = {0,mutStr.length};
//去掉字符串中的换行符
[mutStr replaceOccurrencesOfString:@"\n" withString:@"" options:NSLiteralSearch range:range2];
return mutStr;
}
// 数组转json字符串方法
-(NSString *)convertToJsonDataWithArray:(NSArray *)array
{
NSError *error;
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:array options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonString;
if (!jsonData) {
NSLog(@"%@",error);
}else{
jsonString = [[NSString alloc]initWithData:jsonData encoding:NSUTF8StringEncoding];
}
NSMutableString *mutStr = [NSMutableString stringWithString:jsonString];
NSRange range = {0,jsonString.length};
//去掉字符串中的空格
[mutStr replaceOccurrencesOfString:@" " withString:@"" options:NSLiteralSearch range:range];
NSRange range2 = {0,mutStr.length};
//去掉字符串中的换行符
[mutStr replaceOccurrencesOfString:@"\n" withString:@"" options:NSLiteralSearch range:range2];
return mutStr;
}
//url转uiimage获取网络图片
-(UIImage *) getImageFromURL:(NSString *)fileURL {
UIImage * result;
NSData * data = [NSData dataWithContentsOfURL:[NSURL URLWithString:fileURL]];
result = [UIImage imageWithData:data];
return result;
}
//提取URl参数
-(NSDictionary *)dictionaryWithUrlString:(NSString *)urlStr
{
if (urlStr && urlStr.length && [urlStr rangeOfString:@"?"].length == 1) {
NSArray *array = [urlStr componentsSeparatedByString:@"?"];
if (array && array.count == 2) {
NSString *paramsStr = array[1];
if (paramsStr.length) {
NSMutableDictionary *paramsDict = [NSMutableDictionary dictionary];
NSArray *paramArray = [paramsStr componentsSeparatedByString:@"&"];
for (NSString *param in paramArray) {
if (param && param.length) {
NSArray *parArr = [param componentsSeparatedByString:@"="];
if (parArr.count == 2) {
[paramsDict setObject:parArr[1] forKey:parArr[0]];
}
}
}
return paramsDict;
}else{
return nil;
}
}else{
return nil;
}
}else{
return nil;
}
}
//按指定尺寸比例压缩图片
-(UIImage *)compressImage:(UIImage *)image Width:(CGFloat)width{
float scaleSize = image.size.height / image.size.width;
if (width == 240) {
UIGraphicsBeginImageContext(CGSizeMake(240,240 * scaleSize));
[image drawInRect:CGRectMake(0, 0, 240, 240 * scaleSize)];
}else if(width == 320){
UIGraphicsBeginImageContext(CGSizeMake(320,320 * scaleSize));
[image drawInRect:CGRectMake(0, 0, 320, 320 * scaleSize)];
}else if(width == 200){
UIGraphicsBeginImageContext(CGSizeMake(200,200 * scaleSize));
[image drawInRect:CGRectMake(0, 0, 200, 200 * scaleSize)];
}else{
UIGraphicsBeginImageContext(CGSizeMake(720,720 * scaleSize));
[image drawInRect:CGRectMake(0, 0, 720, 720 *scaleSize)];
}
UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return scaledImage;
}
//按系数压缩图片
- (UIImage*)imageCompressWithSimple:(UIImage*)image
{
CGSize size = image.size;
CGFloat scale = 1.0;
//TODO:KScreenWidth屏幕宽
CGFloat KScreenWidth = [UIScreen mainScreen].bounds.size.width;
CGFloat KScreenHeight = [UIScreen mainScreen].bounds.size.height;
if (size.width > KScreenWidth || size.height > KScreenHeight) {
if (size.width > size.height) {
scale = KScreenWidth / size.width;
}else {
scale = KScreenHeight / size.height;
}
}
CGFloat width = size.width;
CGFloat height = size.height;
CGFloat scaledWidth = width * scale;
CGFloat scaledHeight = height * scale;
CGSize secSize =CGSizeMake(scaledWidth, scaledHeight);
//TODO:设置新图片的宽高
UIGraphicsBeginImageContext(secSize); // this will crop
[image drawInRect:CGRectMake(0,0,scaledWidth,scaledHeight)];
UIImage* newImage= UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
//色值转换
-(UIColor*)toUIColorByStr:(NSString*)colorStr{
NSString *cString = [[colorStr stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
if ([cString length] != 6) return [UIColor blackColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:1.0f];
}
//json字符串转字典
+ (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString
{
if (jsonString == nil) {
return nil;
}
NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding];
NSError *err;
NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:jsonData
options:NSJSONReadingMutableContainers
error:&err];
if(err)
{
NSLog(@"json解析失败：%@",err);
return nil;
}
return dic;
}
// 图片转成base64字符串需要先取出所有空格和换行符
- (NSString *)removeSpaceAndNewline:(NSString *)str
{
NSString *temp = [str stringByReplacingOccurrencesOfString:@" " withString:@""];
temp = [temp stringByReplacingOccurrencesOfString:@"\r" withString:@""];
temp = [temp stringByReplacingOccurrencesOfString:@"\n" withString:@""];
return temp;
}
//转换为标准格式时间转换str = @"yyyy-MM-dd"
-(NSString *)getTimeString:(NSString *)str
{
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:str];
// 得到当前时间（世界标准时间 UTC/GMT）
NSDate *nowDate = [NSDate date];
NSString *nowDateString = [dateFormatter stringFromDate:nowDate];
return nowDateString;
}
