git checkout [commit번호] [file...]
link색깔을 바꿀수도 있음.
height 조절할 때, 먼저 최대화 해준후, sizeToFit
OHAttributedLabel
- (NSString *)stringByReplacingOccurrencesOfString:(NSString *)target withString:(NSString *)replacement
http://stackoverflow.com/questions/668228/string-replacement-in-objective-c
