Web7 apr. 2024 · NSString *filePath = [ [NSBundle mainBundle] pathForResource:@"FileName" ofType:@"FileSuffix"]; NSFileManager *manager = [NSFileManager defaultManager]; NSDictionary *fileDic = [manager attributesOfItemAtPath:filePath error:nil]; unsigned long long size = [ [fileDic objectForKey:NSFileSize] longLongValue]; int filesize = size; //第一 … WebiOS开发--字典 (NSDictionary)和JSON字符串 (NSString)之间互转. 1. 字典转Json字符串. NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dict …
Objective-C NSFileManager的使用_wx5be2d044ee179的技术博 …
Web12 feb. 2015 · How to convert NSDictionary to NSString which contains JSON of NSDictionary ? I have tried but without success //parameters is NSDictionary let … Web首先NSDictionary和数组是差不多的 区别是数组的每一项就是每一下,但是字典的每一项是两个东西key和value 这两个是一一对应的,即key:value的形式 另外字典里面只能存储object … selling scripts for facebook
如何有效降低APP的崩溃率?[通俗易懂] - 思创斯聊编程
Web12 apr. 2024 · 6.NSString crash (字符串操作的crash) 7.UI not on Main Thread Crash (非主线程刷UI(机制待改善)) 下面会一一讲解如何解决这些carsh. unrecognized selector crash. unrecognized selector类型的crash是经常发生的carsh,我们要解决这个carsh就必须先了解它产生的具体原因和流程。 Web1.字符串转字典 NSString * jsonString = @""; NSData *jsonData = [jsonString dataUsingEncoding:NSUTF8StringEncoding]; NSDictionary *dic = … Web9 apr. 2024 · 回顾 转大写 - (NSString*)uppercaseString; - (NSString*)lowercaseString; - (NSString*)capitalizedString; - (BOOL)isEqualToString: (NSString*)aString; - (NSComparisonResult)compare: (NSString*)aString; - (BOOL)hasPrefix: (NSString*)aString; - (BOOL)hasSuffix: (NSString*)aString; - (NSRange)rangeOfString: … selling script online course