limsco_的专栏

-(NSString *)stringFormDict:(NSDictionary*)dict{    NSMutableString *str =[NSMutableStringstring];    NSArray *keys =[dict allKeys];    for(NSString *keyin keys)    {        if ([[dict

id obj =[dic objectForKey:@"name"];  [friendsArray addObject:obj] ;这段代码会抛出exception；改为id obj =[dic objectForKey:@"name"];if(obj){[friendsArrayaddObject:obj]; };

1 首先导入AFNetWorking 库，然后Build phases 添加SystemConfiguration.framework+MobileCoreServices.framework+security.framework~2然后再工程pch文件添加#import和#import Over~

网上看了很多例子，都是用这个方法实现- (CGSize)sizeWithFont:(UIFont *)font constrainedToSize:(CGSize)size lineBreakMode:(UILineBreakMode)lineBreakMode;不过查阅apple文档发现，在iOS7中用boundingRectWithSize：options:attributes