Programmer Think

Articles Catalogue Drawing pictures UIImage class Drawing method Use Watermarking Use Classification.h Classification.m Use classification Code 1: Cut out circular pictures Clipping by drawing Other methods Screen capture Use Crash problem of error-reporting permission to save pictures: Code ...

I. Preface In many graphics software, when switching pictures, you can bring animation transition or switching effect, which is more human-oriented. In fact, it is mainly dazzling, such as shutters, transparency changes, lower left corner flying in, etc. No matter how many kinds of effects, the core is around QPainter to carry out the correspon ...

In practice, we may encounter tables that need to operate on other database instances, but do not want the system to connect to multiple libraries. At this point, we need to use data table mapping. Like DBlink in Oracle, anyone who has used Oracle DBlink database links knows that they can query data across instances. Similarly, Mysql's own FEDE ...

Links to the original text: http://www.cnblogs.com/riasky/p/3481600.html The foreach statement in C # can be used to iterate through elements in a collection, and all types that support IEnumerable or IEnumerable < T> generic inte ...

Learning Catalogue Preface primary Rookie Entry Detailed configuration Simple secondary development Advanced UserManager parsing RoleManager parsing Validator parsing SignInManager parsing Why is there configuration? Normally, users of any product will do some customized functions according ...

vps of vultr, bought last month, still feel slow to watch videos, so look for tutorials online, open BBR acceleration here and record it, which may be used later. BBR is a new congestion control algorithm proposed by Google, which can significantly improve the throughput of Linux servers and reduce the delay of TCP connections. BBR solves t ...

From: http://sindrilin.com/ios-dev/2016/09/23/UITextField UITextField is used as an important control to obtain user information in project, but there are many pits in practical application: modifying keyboard type to limit the type of keyboard, but it is difficult to limit the type of input of third-party keyboard; restricting the length ...

In mobile web development, you will find that when you set an overflow:sroll attribute to an element, when you slide the page on the ios side, the response of page scroll is very slow, there is a kind of Katon feeling, but it scrolls very fast on the Android side, so some people think of using iscroll.js plug-in, so that there is overflow:scrol ...

Introduction to Baas Baas, short for Backend as a Service, is "Mobile Backend as a Service". "Mobile Backend as a Service" is a typical practice of mobile platform in the concept of "cloud". Baas helps us pack things in servers. People who are mobile end don't need to think about how to write servers, how to des ...

Original: Click to visit Now more and more software has begun to use the immersion status bar. Here are two ways to use the immersion status bar. Be careful! Immersive status bar only supports Android Version 4.4 and above Status Bar: Gradient color on 4.4, transparent on 5.0. This simulator demonstrates 4.4. Effect map: Be car ...